• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention discloses an organic electrolyte for a wide-temperature and high-voltage super capacitor which is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent. The formula of 5 the organic electrolyte for a super capacitor is optimized in the present invention, specifically, components of the solvent, having a low melting point, added into the organic electrolyte are selected; the ionic liquid is added to improve the high-temperature resistance and high-voltage resistance while decreasing the solidifying point of the electrolyte. The organic electrolyte for a 10 super capacitor of the present invention has excellent low-temperature resistance, high-temperature resistance and high-voltage resistance. The present invention further discloses a method for preparing the organic solution for a wide-temperature and high-voltage super capacitor. This preparation method has simple steps and high operability and is suitable for industrial 15 production.
    公开号:NL2015823A
    申请号:NL2015823
    申请日:2015-11-20
    公开日:2016-09-20
    发明作者:Ruan Dianbo；Zeng Fudi；Fu Guansheng
    申请人:Ningbo Csr New Energy Tech Co Ltd；
    IPC主号:
    专利说明:

    ORGANIC ELECTROLYTE FOR WIDE-TEMPERATURE AND HIGH-VOLTAGE SUPER CAPACITORS
    Technical Field of the Invention
    The present invention relates to the technical field of electrolytes for super capacitors, and in particular to an organic electrolyte for a wide-temperature and high-voltage super capacitor and a preparation method thereof.
    Background of the Invention
    Electrochemical double-layer capacitors, also known as super capacitors, ultra-capacitors and the like, are novel energy storage devices falling in between secondary batteries and traditional electrostatic capacitors. The energy density of the electrochemical double-layer capacitors is higher than that of the traditional electrostatic capacitors, and the power density of the electrochemical double-layer capacitors is higher than that of the secondary batteries. The electrochemical double-layer capacitors have advantages of high power density, long cycle life, wide range of the operating temperature and excellent cyclic stability, and they are maintenance-free and environmentally friendly. Such capacitors have shown a wide prospect application in fields such as rail transit, wind power generation, hybrid electric vehicles, and standby power supplies for electronic devices.
    An organic electrolyte for an existing super capacitor mainly contains an organic solvent and an organic salt. The solvent includes acetonitrile, propylene carbonate and the like, and the organic salt includes tetraethylammonium tetrafluoroborate and triethylmethylammonium tetrafluoroborate. The operating voltage is generally 2.7 V while the lowest operating temperature is -50°C. This is because that if the temperature is lower than -50°C, the electrolyte will be crystallized, as a result, the capacitor fails to realize the functions of charge and discharge.
    In many fields such as aerospace, military and polar environment, the operating temperature of electronic energy storage devices is required to be -60 °C or below, it was reported by National Aeronautics and Space Administration that a super capacitor made by adding methyl formate, 1,3-dioxolane, methyl acetate, ethyl formate and the like into an acetonitrile electrolyte may work at a low temperature of -60 °C . However, the aforementioned solvents in the electrolyte have defects. For example, the boiling point of methyl formate is just 39 °C , this results in poor high-temperature performance of the super capacitor, and the capacitor will swell because of the volatilization of the solvents when working at 50°C. Additionally, since such an electrolyte system has poor voltage resistance, the capacitor works generally under 2.5 V.
    Chinese Patent Application CN102254691A, filed on November 23, 2011, disclosed an electrolyte for a super capacitor. By adding a solvent having a low melting point into the dominant solvent, i.e., acetonitrile or propylene carbonate, the electrolyte for the super capacitor has excellent ionic conductivity at a low temperature, so that the super capacitor can work at a low temperature. This electrolyte has the following deficiency: due to its poor high-temperature resistance and high-voltage resistance, the applicable range of this low-temperature electrolyte is extremely limited.
    Summary of the Invention
    In order to solve the problem that an organic electrolyte for a super capacitor cannot have low-temperature resistance, high-temperature resistance and high-voltage resistance so that applicable range of the electrolyte is extremely limited, the present invention provides an organic electrolyte for a wide-temperature and high-voltage super capacitor, which has excellent low-temperature resistance, high-temperature resistance and high-voltage resistance as well as a wide applicable range.
    The present invention further provides a method for preparing the organic solution for a wide-temperature and high-voltage super capacitor. This preparation method has simple steps and high operability and is suitable for industrial production.
    The present invention employs the following technical solutions to achieve the aforementioned objective.
    An organic electrolyte for a wide-temperature and high-voltage super capacitor is provided. This organic electrolyte is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent; and the concentration of the electrolyte salt in the organic electrolyte ranges from 0.5 mol/L to 1.5 mol/L, the concentration of the ionic liquid ranges from 0.01 mol/L to 0.05 mol/L, and the mixed organic solvent is formed by mixing acetonitrile and a solvent having a low melting point at a volume ratio of 1:0.1-2. The formula of the organic electrolyte for a super capacitor is optimized in the present invention, specifically, the solvent having a low melting point and the ionic liquid are added into the organic electrolyte to improve the high-temperature resistance and high-voltage resistance while decreasing the solidifying point of the electrolyte; since the operating temperature has a wide range from 65 °C to 70 °C, the electrolyte has excellent low-temperature resistance and high-temperature resistance; and since the voltage resistance range may be up to about 2.75 V, the electrolyte has excellent high-voltage resistance.
    Preferably, the electrolyte salt is one or more of tetraethylammonium tetrafluoroborate, tetramethylammonium tetrafluoroborate, triethylmethylammonium tetrafluoroborate, N,N-dimethylpyrrolidine tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, N-methyl-N-ethylpyrrolidine tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, and 5-azaaspiro[4,4] nonane tetrafluoroborate.
    Preferably, the ionic liquid is one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1 -butyl-3-methylimidazolium tetrafluoroborate, N-methyl,propyl piperidin bis(trifluoromethylsulfony)imide and N-methyl,propyl pyrrolidine bis(trifluoromethylsulfony)imide.
    Preferably, the solvent having a low melting point is one or more of diethyl carbonate, ethyl propionate, butyric acid ester, dimethyl sulfite, diethyl sulfite, isobutyl formate, n-butyl acetate, hexyl acetate and butyl valerate. A method for preparing the organic electrolyte for a wide-temperature and high-voltage super capacitor is provided, including the following steps of: weighing the electrolyte salt, the ionic liquid and the mixed organic solvent according to the aforementioned ratio, then dissolving the electrolyte salt and the ionic liquid in the mixed organic solvent, and ultrasonic dispersion the mixture in vacuum, to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor. In the present invention, the components are mixed and then ultrasonically dispersed in vacuum, and some bubbles are generated during the ultrasonic dispersion. However, the generation of bubbles may be effectively eliminated during the ultrasonic dispersion in vacuum, and the dispersion uniformity of the components is better.
    Preferably, the electrolyte salt is one or more of tetraethylammonium tetrafluoroborate, tetramethylammonium tetrafluoroborate, triethylmethylammonium tetrafluoroborate, N,N-dimethylpyrrolidine tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, N-methyl-N-ethylpyrrolidine tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, and 5-azaaspiro[4,4] nonane tetrafluoroborate.
    Preferably, the ionic liquid is one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1 -butyl-3-methylimidazolium tetrafluoroborate, N-methyl,propyl piperidin bis(trifluoromethylsulfony)imide and N-methyl,propyl pyrrolidine bis(trifluoromethylsulfony)imide.
    Preferably, the solvent having a low melting point is one or more of diethyl carbonate, ethyl propionate, butyric acid ester, dimethyl sulfite, diethyl sulfite, isobutyl formate, n-butyl acetate, hexyl acetate and butyl valerate.
    Preferably, the temperature during the ultrasonic dispersion is controlled to be 25°C to 35°C. The effect of ultrasonic waves in dispersion of liquid mainly depends upon ultrasonic cavitation of the liquid. The cavitation will generate a lot of bubbles in the electrolyte, and the bubbles in the electrolyte escape slowly. Consequently, the efficiency of removal in vacuum is significantly influenced. Therefore, in the present invention, the temperature during the ultrasonic dispersion is controlled to be 25 °C to 35 °C to accelerate the bubbles to escape and break, thereby facilitating the improvement of the degassing efficiency.
    Preferably, during the ultrasonic dispersion, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring, and an amount of nitrogen gas without causing the electrolyte to splash out is preferred. A lot of bubbles will be generated in the electrolyte during the ultrasonic dispersion, and these bubbles escape slowly; and furthermore, the ultrasonic dispersion brings a thermal effect which can result in change in the temperature of the entire electrolyte system, which is not conducive to control of the temperature of the ultrasonic dispersion. Hence, in the present invention, in order to solve the aforementioned two problems, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring. The passed nitrogen gas has the following effects: first, it is passed for a purpose of stirring and cooling so that heat generated by the ultrasonic dispersion may be taken away in time, and thus the stability of the dispersion temperature may be ensured; and second, by the passed nitrogen gas, the electrolyte may roll over from bottom to top, thereby accelerating the escape of bubbles in the electrolyte and further improving the mixing uniformity of components in the electrolyte.
    Hence, the present invention has the following beneficial effects: (1) the formula of the organic electrolyte for a super capacitor is optimized in the present invention, specifically, components of the solvent, having a low melting point, added into the organic electrolyte are selected; the ionic liquid is added to improve the high-temperature resistance and high-voltage resistance while decreasing the solidifying point of the electrolyte; the operating temperature has a wide range from -65°C to 70°C; the organic electrolyte for a super capacitor in the present invention has excellent low-temperature resistance, high-temperature resistance and high-voltage resistance; and the voltage resistance range may be up to about 2.75 V; and (2) the preparation method has simple steps, excellent dispersion uniformity of components, and high operability, and is suitable for industrial production.
    Detailed Description of the Invention
    The present invention will be further described below in detail by specific implementations.
    In the present invention, all percentages represent a unit of weight, unless otherwise specifically noted. All equipment and raw materials may be commercially available or common in the art. Methods mentioned in the following embodiments are all conventional methods in the art, unless otherwise specifically noted.
    Embodiment 1
    An organic electrolyte for a wide-temperature and high-voltage super capacitor is provided; it is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent; and the concentration of the electrolyte salt in the organic electrolyte is 0.5 mol/L, the concentration of the ionic liquid is 0.01 mol/L, and the mixed organic solvent is formed by mixing acetonitrile and a solvent having a low melting point at a volume ratio of 1:0.1, wherein the electrolyte salt is tetraethylammonium tetrafluoroborate, the ionic liquid is 1-ethyl-3-methylimidazolium tetrafluoroborate, and the solvent having a low melting point is diethyl carbonate.
    The organic electrolyte for a wide-temperature and high-voltage super capacitor is prepared by the following method: weighing the electrolyte salt, the ionic liquid and the mixed organic solvent according to the aforementioned ratio, then dissolving the electrolyte salt and the ionic liquid in the mixed organic solvent, and ultrasonically dispersing the mixture in vacuum, to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor. During the ultrasonic dispersion, the temperature is controlled to be 25°C, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring, and an amount of nitrogen gas without causing the electrolyte to splash out is preferred. A super capacitor prepared from the electrolyte in the embodiment may charge and discharge under 2.7 V at a low temperature of -65°C; when the temperature is -50°C, 85% of the capacity at a normal temperature of 25°C is retained; when the temperature drops to -55°C, the capacity retention ratio is 76%; when the temperature drops to -60°C, the capacity retention ratio is 61.8%; when the temperature drops to -65°C, the capacity retention ratio is 44%; and the super capacitor may realize 10000 charge-discharge cycles at 70°C, with a capacity loss of 5%.
    Embodiment 2
    An organic electrolyte for a wide-temperature and high-voltage super capacitor is provided; it is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent; and the concentration of the electrolyte salt in the organic electrolyte is 1.5 mol/L, the concentration of the ionic liquid is 0.05 mol/L, and the mixed organic solvent is formed by mixing acetonitrile and a solvent having a low melting point at a volume ratio of 1:2, wherein the electrolyte salt is formed by mixing tetraethylammonium tetrafluoroborate, tetramethylammonium tetrafluoroborate and triethylmethylammonium tetrafluoroborate at a mole ratio of 1:1:3, the ionic liquid is formed by mixing 1-ethyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-methylimidazolium tetrafluoroborate at a mole ratio of 1:2, and the solvent having a low melting point is formed by mixing diethyl carbonate, diethyl sulfite and isobutyl formate at a volume ratio of 1:3:1.
    The organic electrolyte for a wide-temperature and high-voltage super capacitor is prepared by the following method: weighing the electrolyte salt, the ionic liquid and the mixed organic solvent according to the aforementioned ratio, then dissolving the electrolyte salt and the ionic liquid in the mixed organic solvent, and ultrasonically dispersing the mixture in vacuum, to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor. During the ultrasonic dispersion, the temperature is controlled to be 35°C, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring, and an amount of nitrogen gas without causing the electrolyte to splash out is preferred. A capacitor prepared from the electrolyte in the embodiment may charge and discharge under 2.75 V at a low temperature of -65 °C; when the temperature is -50°C, 86% of the capacity at a normal temperature of 25°C is retained; when the temperature drops to -55°C, the capacity retention ratio is 78%; when the temperature drops to -60°C, the capacity retention ratio is 65%; when the temperature drops to -65°C,the capacity retention ratio is 49%; and the super capacitor may realize 10000 charge-discharge cycles at 70°C, with a capacity loss of 5%.
    Embodiment 3
    An organic electrolyte for a wide-temperature and high-voltage super capacitor is provided; it is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent; and the concentration of the electrolyte salt in the organic electrolyte is 1 mol/L, the concentration of the ionic liquid is 0.02 mol/L, and the mixed organic solvent is formed by mixing acetonitrile and a solvent having a low melting point at a volume ratio of 1:0.6, wherein the electrolyte salt is formed by mixing Ν,Ν-dimethylpyrrolidine tetrafluoroborate, N-methyl-N-ethylpyrrolidine tetrafluoroborate and N,N-diethylpyrrolidine tetrafluoroborate at a mole ratio of 3:1:1, the ionic liquid is N-methyl,propylpyrrolidine bis(trifluoromethylsulfony)imide, and the solvent having a low melting point is formed by mixing butyric acid ester, dimethyl sulfite at a volume ratio of 1:1.
    The organic electrolyte for a wide-temperature and high-voltage super capacitor is prepared by the following method: weighing the electrolyte salt, the ionic liquid and the mixed organic solvent according to the aforementioned ratio, then dissolving the electrolyte salt and the ionic liquid in the mixed organic solvent, and ultrasonic dispersion the mixture in vacuum, to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor. During the ultrasonic dispersion, the temperature is controlled to be 30°C, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring, and an amount of nitrogen gas without causing the electrolyte to splash out is preferred. A capacitor prepared from the electrolyte in the embodiment may charge and discharge under 2.8 V at a low temperature of -65 °C; when the temperature is -50°C, 83% of the capacity at a normal temperature of 25°C is retained; when the temperature drops to -55°C, the capacity retention ratio is 75%, and when the temperature drops to -60°C, the capacity retention ratio is 60%; when the temperature drops to -65°C,the capacity retention ratio is 43%; and the super capacitor may realize 10000 charge-discharge cycles at 70°C, with a capacity loss of 7%.
    Embodiment 4
    An organic electrolyte for a wide-temperature and high-voltage super capacitor is provided; it is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent; and the concentration of the electrolyte salt in the organic electrolyte is 1.5 mol/L, the concentration of the ionic liquid is 0.02 mol/L, and the mixed organic solvent is formed by mixing acetonitrile and a solvent having a low melting point at a volume ratio of 1:1, wherein the electrolyte salt is formed by mixing triethylmethylammonium tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, N-methyl-N-ethylpyrrolidine tetrafluoroborate and Ν,Ν-dimethylpyrrolidine tetrafluoroborate at a mole ratio of 1:2:2:1, the ionic liquid is formed by mixing 1-ethyl-3-methylimidazolium tetrafluoroborate, 1 -butyl-3-methylimidazolium tetrafluoroborate, N-methyl,propyl piperidin bis(trifluoromethylsulfony)imide and N-methyl,propyl pyrrolidine bis(trifluoromethylsulfony)imide at a mole ratio of 1:3:1:3, and the solvent having a low melting point is formed by mixing diethyl carbonate and ethyl propionate at a volume ratio of 1:1.
    The organic electrolyte for a wide-temperature and high-voltage super capacitor is prepared by the following method: weighing the electrolyte salt, the ionic liquid and the mixed organic solvent according to the aforementioned ratio, then dissolving the electrolyte salt and the ionic liquid in the mixed organic solvent, and ultrasonic dispersion the mixture in vacuum, to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor. During the ultrasonic dispersion, the temperature is controlled to be 28°C, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring, and an amount of nitrogen gas without causing the electrolyte to splash out is preferred. A super capacitor prepared from the electrolyte in the embodiment may charge and discharge under 2.75V at a low temperature of -70°C; when the temperature is -50°C, 87% of the capacity at a normal temperature of 25°C is retained; when the temperature drops to -55°C, the capacity retention ratio is 81%, and when the temperature drops to -60°C, the capacity retention ratio is 69%; when the temperature drops to -65°C,the capacity retention ratio is 46%; and the super capacitor may realize 10000 charge-discharge cycles at 70°C, with a capacity loss of 8%.
    The aforementioned embodiments are merely preferred solutions of the present invention, and not intend to limit the present invention in any forms. Other variations and modifications may be made without exceeding the technical solutions recorded by the claims.
    The invention can be described as follows:
    Organic electrolyte for a wide-temperature and high-voltage super capacitor, characterized in that it is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent; and the concentration of the electrolyte salt in the organic electrolyte ranges from 0.5 mol/L to 1.5 mol/L, the concentration of the ionic liquid ranges from 0.01 mol/L to 0.05 mol/L, and the mixed organic solvent is formed by mixing acetonitrile and a solvent having a low melting point at a ratio of 1:0.1-2.
    The invention also relates to a method for preparing the organic electrolyte for a wide-temperature and high-voltage super capacitor, comprising the following steps of: weighing the electrolyte salt, the ionic liquid and the mixed organic solvent according to the aforementioned ratio, then dissolving the electrolyte salt and the ionic liquid in the mixed organic solvent, and ultrasonically dispersing the mixture in vacuum, to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor.
    One or more of the following additional preferred features can be part of preferred embodiments of the invention, alone or in any combination of features: - the electrolyte salt is one or more of tetraethylammonium tetrafluoroborate, tetramethylammonium tetrafluoroborate, triethylmethylammonium tetrafluoroborate, N,N-dimethylpyrrolidine tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, N-methyl-N-ethylpyrrolidine tetrafluoroborate, Ν,Ν-diethylpyrrolidine tetrafluoroborate, and 5-azaaspiro[4,4] nonane tetrafluoroborate. - the ionic liquid is one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1 -butyl-3-methylimidazolium tetrafluoroborate, N-methyl,propyl piperidin bis(trifluoromethylsulfony)imide and N-methyl,propyl pyrrolidine bis(trifluoromethylsulfony)imide. - the solvent having a low melting point is one or more of diethyl carbonate, ethyl propionate, butyric acid ester, dimethyl sulfite, diethyl sulfite, isobutyl formate, n-butyl acetate, hexyl acetate and butyl valerate. - the temperature during the ultrasonically dispersing is controlled to be 25 °C to 35 °C. - during the ultrasonically dispersing, nitrogen gas is passed into the mixture by a glass tube inserted below the liquid level for stirring, and an amount of nitrogen gas without causing the electrolyte does to splash out is preferred.
    权利要求:
    Claims (9)
    [1]
    An organic electrolyte for a wide-temperature and high-voltage super capacitor, characterized in that it is formed by mixing an electrolyte salt, an ionic liquid and a mixed organic solvent, and the content of the electrolyte salt in the organic electrolyte is between 0.5 mol / l and 1.5 mol / l, the ionic liquid content is between 0.01 mol / l and 0.05 mol / l, and the mixed organic solvent is formed by mixing of acetonitrile and a solvent with a low melting temperature in a ratio of 1: 0.1-2.
    [2]
    The organic electrolyte for a wide-temperature and high-voltage super capacitor according to claim 1, characterized in that the electrolyte salt is one or more of tetraethylammonium tetrafluoroborate, tetramethylammonium tetrafluoroborate, triethylmethylammonium tetrafluoroborate, Ν, Ν-dimethylpyrrolidine, tetrafluoroborate , Diet-diethylpyrrolidine tetrafluoroborate, N-methyl-N-ethylpyrrolidine tetrafluoroborate, Ν, diet-diethylpyrrolidine tetrafluoroborate, and 5-azaasprio [4,4} nonane tetrafluoroborate.
    [3]
    The organic electrolyte for a wide-temperature and high-voltage super capacitor according to claim 1 or 2, characterized in that the ionic liquid is one or more of 1-ethyl-3-methylinidazolium tetrafluoroborate, 1-buthyl-3- methylinidazolium tetrafluoroborate, N-methyl, propyl piperidine bis (trifluoromethylsulfony) imide and N-methyl, propyl pyrrolidine bis (trifluoromethylsulfony) imide.
    [4]
    The organic electrolyte for a wide-temperature and high-voltage super capacitor according to claim 1, 2 or 3, characterized in that the low melting temperature solvent is one or more of diethyl carbonate, ethyl propionate, butyric acid ester, dimethyl sulfite, isobutyl formate, n-butyl acetate, hexyl acetate and butyl valerate.
    [5]
    A method for manufacturing an organic electrolyte for a wide-temperature and high-voltage super capacitor according to any one of the preceding claims, comprises the following steps: - weighing the electrolyte salt, the ionic liquid and the mixed organic solvent - subsequently dissolving of the electrolyte salt and the ionic liquid in the mixed solvent and - ultrasonically dispersing the mixture in vacuum to obtain the organic electrolyte for a wide-temperature and high-voltage super capacitor.
    [6]
    The method according to claim 5, characterized in that the electrolyte salt is one or more of tetraethylammonium tetrafluoroborate, tetramethylammonium tetrafluoroborate, triethylmethylammonium tetrafluoroborate, Ν, dim-dimethylpyrrolidine tetrafluoroborate, Ν, Ν-diethyl-pyrrolidine-n-tetrahyl-pyrrolidine-n-tetrahydropyorbate ethylpyrrolidine tetrafluoroborate, Ν, Ν-dimethylpyrrolidine tetrafluoroborate, and 5-azaasprio [4,4} nonane tetrafluoroborate.
    [7]
    The method according to claim 5 or 6, characterized in that the ionic liquid is one or more of 1-ethyl-3-methylinidazolium tetrafluoroborate, 1-buthyl-3-methylinidazolium tetrafluoroborate, N-methyl, propyl piperidine bis (trifluoromethylsulfony) imide and N-methyl, propyl pyrrolidine bis (trifluoromethylsulfony) imide.
    [8]
    The process according to claim 5, 6 or 7, characterized in that the low melting temperature solvent is one or more of diethyl carbonate, ethyl propionate, butyric acid ester, dimethyl sulfite, isobutyl formate, n-butyl acetate, hexyl acetate and butyl valerate.
    [9]
    The method according to any of claims 5 to 8, characterized in that the temperature during the ultrasonic dispersion is controlled at 25 ° C to 35 ° C. The method according to any of claims 5 to 9, characterized in that, during the ultrasonic dispersion, nitrogen gas is introduced into the mixture through a glass tube introduced below the liquid level to stir, and preferably an amount of gas containing the electrolyte does not spray.
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    法律状态:
    优先权:
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    CN201410761491.1A|CN104681302A|2014-12-12|2014-12-12|Wide-temperature high-voltage type super capacitor organic electrolyte solution and preparing method thereof|
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