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An organic system supercapacitor or capacitor battery

A technology for supercapacitors and capacitor batteries, applied in the direction of hybrid capacitor electrolytes, etc., can solve the problems of leakage of liquid electrolyte, increase in cost, easy damage of gel state, etc., achieve high transition temperature and reversibility, strong impact resistance, The effect of high charge and discharge efficiency

Active Publication Date: 2021-01-26
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the leakage and flammability of liquid electrolytes, inorganic solid electrolytes, polymer solid electrolytes, and polymer gel electrolytes have been widely studied. Among them, the inorganic solid electrolyte is a lithium salt containing inorganic superionic conductivity. ; Polymer solid electrolyte is a conductive solid composed of polymer and lithium salt, but the conductivity of the currently reported solid electrolyte is not good, which seriously affects the service life of the prepared supercapacitor
[0005] Although the polymer gel electrolyte has good conductivity, and its porous structure can effectively inhibit the volatilization and leakage of the electrolyte, however, the preparation of the polymer gel electrolyte reported so far is to introduce polymer or The small molecule organic gel factor with relatively complicated synthesis steps is in the conventional electrolyte, and the obtained polymer gel electrolyte needs to be in a fluid state at a relatively high temperature, and is in a gel state at a low temperature, which makes injection When injecting liquid, high-temperature liquid injection is required, which increases the complexity of the experimental operation. In addition, the transition temperature of the prepared polymer gel electrolyte is relatively low, and the gel state is relatively easy to be destroyed. Once the gel is destroyed , cannot be reused, greatly increasing the cost

Method used

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  • An organic system supercapacitor or capacitor battery
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  • An organic system supercapacitor or capacitor battery

Examples

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preparation example Construction

[0107] [Preparation method of gel electrolyte]

[0108] The present invention also provides a kind of preparation method of above-mentioned gel electrolyte, it comprises the following steps:

[0109] The ether compound, the lithium salt, and optionally the electrolyte solution or its solvent for an organic system supercapacitor or capacity battery and optionally inorganic nanoparticles and optional additives are mixed to obtain the ether compound of the lithium salt under stirring The solution, that is, the gelatable system, is continuously stirred to obtain the gel electrolyte through gelation.

[0110] Preferably, the preparation method of the gel electrolyte specifically includes the following steps:

[0111] The ether compound is added in the lithium salt, and the ether compound solution of the lithium salt is obtained under stirring, and optionally the electrolyte solution or its solvent and / or inorganic nanoparticles and / or additives for supercapacitors or capacitor bat...

Embodiment 1

[0148] (1) Preparation of gel electrolyte used as supercapacitor

[0149] Weigh 0.8g of lithium hexafluorophosphate solid into a reagent bottle, add 9.2mL of tetrahydropyran, and mix thoroughly under magnetic stirring to obtain a gelatinable system; let it stand for a while to form a gel electrolyte.

[0150] In the gel system, the mass percent of lithium salt is 8wt%, the mass percent of ether compound is 92wt%, and the mass percent of electrolyte solution or its solvent for lithium ion battery is 48wt%.

[0151] After testing, the performance parameters of the gel are listed in Table 1.

[0152] When the prepared gel was heated above the transition temperature of the gel, the gel began to become viscous, and the gel would be observed to flow downward when the reagent bottle was inverted, indicating that the temperature had reached the transition temperature of the gel, and when the temperature When the temperature dropped below the transition temperature of the gel, the gel...

Embodiment 2

[0158] (1) Preparation of gel electrolyte used as capacitor battery

[0159] Weigh 1.0g of lithium perchlorate and 0.5g of lithium trifluoromethanesulfonate solid in a reagent bottle, add 8.5mL of ethylene glycol methyl ethyl ether to the above mixture, and mix thoroughly to obtain a gelatable System; stand for a period of time to form a gel electrolyte.

[0160] In the gel system, the mass percent content of lithium salt is 15 wt %; the mass percentage content of ether compounds is 85 wt %.

[0161] After testing, the performance parameters of the gel are listed in Table 1.

[0162] When the prepared gel was heated above the transition temperature of the gel, the gel began to become viscous, and the gel would be observed to flow downward when the reagent bottle was inverted, indicating that the temperature had reached the transition temperature of the gel, and when the temperature When the temperature dropped below the transition temperature of the gel, the gel was re-forme...

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Abstract

The invention discloses a supercapacitor or capacitor battery of an organic system, which includes a gel electrolyte and / or a solid electrolyte, the gel electrolyte and / or solid electrolyte are prepared from a gelatable system, the The gellable system includes the following components, (a) lithium salt, (b) ether compound; the mass percentage of gellable polymer and / or gellable prepolymer in the system is less than or equal to 1 wt%; by adjusting the content and types of lithium salts and ether compounds in the system, it is possible to prepare gels and / or reversible gels with adjustable strength, adjustable formation time, and adjustable transition temperature Solid electrolyte; the preparation method is simple, the reaction conditions are mild, the reaction cycle is short, the product yield is high, the preparation cost is low, and industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of gel electrolyte, and in particular relates to an organic system supercapacitor or capacitor battery. Background technique [0002] In recent years, the excessive consumption of fossil energy has caused energy crisis and environmental problems. A large number of vehicle exhaust emissions have caused global warming and smog weather. These problems have seriously affected human production and life. Electric energy is a kind of clean energy and can be recycled by rechargeable batteries. Due to the advantages of high voltage platform, high energy density, long cycle life and low self-discharge, lithium batteries can not only be used in portable electronic devices, such as: digital It is widely used in equipment such as cameras and portable computers, and also in electric tools and electric vehicles. The most typical ones are lithium-ion batteries, lithium-sulfur batteries, and lithium-air batteries. And the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/56
CPCH01G11/56Y02E60/13
Inventor 周建军胡志宇刘凤泉李林方芳
Owner BEIJING NORMAL UNIVERSITY
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