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Capacitor electrolyte

An electrolyte and capacitor technology, applied in the field of electrochemistry, can solve problems such as potential safety hazards

Inactive Publication Date: 2014-01-15
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the development of power sources, safety is one of the key factors to be considered. When the capacitor is overcharged, the ionic liquid electrolyte will decompose or react with the electrode material, resulting in safety hazards
The overcharging of ionic liquid capacitors is one of the main reasons for their safety hazards

Method used

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  • Capacitor electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In a glove box, mix dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide and 3-chloromethoxybenzene at a molar ratio of 1:0.04, that is, 5 mol and 0.2 mol respectively , after stirring for 60 minutes, 3-chloromethoxybenzene was uniformly dispersed in dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide salt to obtain a capacitor electrolyte.

[0017] The capacitor using the above-mentioned capacitor electrolyte has a voltage of 5.30V when it is overcharged.

[0018] figure 1 The charging curve of the capacitor using the capacitor electrolyte prepared in Example 1 and the pure ionic liquid dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide salt as the electrolyte.

[0019] From figure 1 It can be seen from the charging curve that the voltage of a capacitor using pure ionic liquid dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide salt as electrolyte rises rapidly when overcharged. However, when the capacitor with dimethylpentylsulfonium bis(tri...

Embodiment 2

[0021] In a glove box, mix dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide and 3-chloromethoxybenzene at a molar ratio of 1:0.04, that is, 1 mol and 0.04 mol moles respectively , after stirring for 30 minutes, 3-chloromethoxybenzene was uniformly dispersed in dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide salt to obtain a capacitor electrolyte.

[0022] The capacitor using the above-mentioned capacitor electrolyte has a voltage of 5.30V when it is overcharged.

Embodiment 3

[0024] In a glove box, mix dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide and 3-chloromethoxybenzene at a molar ratio of 1:0.03, that is, 2 mol and 0.06 mol respectively , After stirring for 25 minutes, 3-chloromethoxybenzene was uniformly dispersed in dimethylpentylsulfonium bis(trifluoromethylsulfonyl)imide salt to obtain a capacitor electrolyte.

[0025] The capacitor using the above-mentioned capacitor electrolyte has a voltage of 5.31V when it is overcharged.

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Abstract

The invention belongs to the field of electrochemistry, and discloses a capacitor electrolyte. The capacitor electrolyte is formed by mixing dimethyl amyl sulphonium bis (trifluoromethyl sulfonyl) imine salts and 3-chlorin anisole, wherein the mole ratio of the dimethyl amyl sulphonium bis (trifluoromethyl sulfonyl) imine salts and the 3-chlorin anisole is 1:0.001-1:0.05. The capacitor electrolyte is applied to a capacitor, and the capacitor does not have chemical reactions or electrochemical reactions with any components of the electrolyte when the capacitor is charged normally; when the capacitor is overcharged, the 3-chlorin anisole starts to polymerize on electrodes to form polymers, potential forms a small platform, the polymers do not rise quickly any more, inevitably pass through a porous membrane and reach the negative electrode of the capacitor due to the fact the polymers are increased continuously, a micro short current is caused inside the capacitor, the electric energy inside the capacitor is made to be released slowly, therefore, the dangerousness of the capacitor is reduced, and the safety of the capacitor is improved greatly.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a capacitor electrolyte. Background technique [0002] Capacitor is a new type of energy storage device, which has the advantages of high power density, high cycle life, and fast charge and discharge performance. It is widely used in military fields, mobile communication devices, computers, and hybrid power supplies for electric vehicles. As an important part of the capacitor, the electrolyte has a great influence on the storage performance of the capacitor, which determines the equivalent internal resistance, working voltage range, storage capacity, working temperature and working environment of the capacitor. [0003] Ionic liquids are organic liquid substances composed entirely of ions at or near room temperature. As a new type of electrolyte, the emergence of ionic liquids has greatly expanded the application fields of capacitors. [0004] In the development of power supplie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
Inventor 周明杰邓惠仁王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD