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High-temperature electrolyte of lithium ion battery

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries, can solve the problems of rapid loss of use and storage capacity, and achieve the effect of improving use and storage performance and reducing decomposition.

Inactive Publication Date: 2014-03-19
HUARUI XINXIANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology uses an acidic compound called Imidazolum Salt (I) that can be added into both cathode materials during production or used with other battery components like current collectors for better stability when exposed to harsh conditions such as extreme temperatures. By preventing damage caused by heat and pressure, this method reduces the loss of electrical energy stored within the cells without affecting their overall functioning properly.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the heat resistance (thermal stability) of laminated solid state secondary cells that contain an organic liquid elecrolayer due to their poor conductivity under extreme conditions such as overheating caused by excessive charging/dischargings during operation.

Method used

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  • High-temperature electrolyte of lithium ion battery

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Effect test

Embodiment 1

[0018] The mass percentage is 1.5% lithium imide trifluoromethanesulfonate and 13% lithium hexafluorophosphate dissolved in 85.5% organic solvent (the mass ratio of propylene carbonate, ethylene carbonate, ethyl methyl carbonate and ethyl acetate is 1:1: 1:1), mix well to make electrolyte.

Embodiment 2

[0020] The mass percentage is 1.5% ethylenediamine imine and 12.5% ​​lithium hexafluorophosphate dissolved in 86% organic solvent (the mass ratio of propylene carbonate, ethylene carbonate, ethyl methyl carbonate and ethyl acetate is 1:1:1:1 ), mix well to make electrolyte.

Embodiment 3

[0022] The mass percentage is 2.5% lithium bisfluorosulfonate imide and 12.5% ​​lithium hexafluorophosphate dissolved in 85% organic solvent (propylene carbonate, ethylene carbonate, ethyl methyl carbonate and ethyl acetate mass ratio is 1:1: 1:1), mix well to make electrolyte.

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Abstract

The invention relates to high-temperature electrolyte of a lithium ion battery. The high-temperature electrolyte is characterized by consisting of the following components: component A, namely 12-16 percent of lithium salt, component B, namely 81-87 percent of organic solvent component C, namely 1.5-5 percent of ammonium salt. Because lithium bi(trifluoromethylsulfonyl)imide substances are added into the electrolyte, the phenomena that the structure of an anode material is damaged at high temperature and under high pressure and metal ions are deposited on an electrode on the surface of a cathode can be reduced to a certain degree by the lithium salt. Therefore, decomposition of the electrolyte on the surfaces of the anode and the cathode is effectively reduced, and the service and storage performances of the lithium ion battery in a high-temperature environment are improved.

Description

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Claims

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Application Information

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Owner HUARUI XINXIANG CHEM
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