Dynamic electrolyte for lithium ion battery

A lithium-ion battery and electrolyte technology, applied in the field of electrolyte for lithium-ion batteries, can solve problems affecting battery capacity and service life, achieve high capacity, good cycle life, and improve performance

Active Publication Date: 2007-03-07
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for better control over heat generated by batteries when they're used outdoors or stored indoors without losing their effectiveness due to decompositions reactions caused by certain chemicals included therein. By adding specific substances like phytates (a type of acid) which helps stabilizing the elecrosis process and prevent excess charge from causing damage, this results in an excellent combination of properties such as long storage time, safe operation even after being exposed to extreme temperatures, reduced risk of explosions, longer lifespan compared to traditional methods, etc., making them ideal candidates for applications where higher energy density needs to be achieved than what was previously possible beforehand.

Problems solved by technology

This technical issue addressed in this patented text relates to improving the security and reliability of Li ion batteries for applications like electronic devices that require longer lifespan under harsh conditions without causing harmful effects on their functioning well. Current methods involve adding chemical agents into the elecrotic material itself with limited success because it may lead to decomposition or other issues if left untreated. Therefore, new ways to create solid-state LIBs instead of liquids would provide better stability and durability while minimizing any negative side reactions caused by excessive thermal generation from the battery's own components.

Method used

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  • Dynamic electrolyte for lithium ion battery
  • Dynamic electrolyte for lithium ion battery
  • Dynamic electrolyte for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ethylene carbonate, propylene carbonate, methyl propyl carbonate, and dipropyl carbonate of the carbonate solvent are mixed uniformly according to 26.43%, 11.32%, 12.94%, and 24.81% of the total liquid weight, and then 12.5 %LiPF 6 , add in three times on average, the time interval between each addition is 1.5 to 2.0 hours, shake well after adding, and then add film-forming additives of vinylene carbonate 1.0% and propylene sulfite 2.0%, anti-overfilling additive cyclohexylbenzene 7.0%, flame retardant trifluoromethyl phosphate 2.0%. The entire preparation process of the electrolyte is operated in a glove box, the glove box is in an argon environment, the temperature in the box is controlled within 25°C, and the moisture is below 1ppm.

[0032] This electrolyte solution was injected into the battery and tested.

[0033] The batteries used are:

[0034] Preparation of positive electrode: active material LiCoO 2 The content of carbon black is 94%, carbon black is 3.0%...

Embodiment 2-7

[0047] Example 1

Embodiment 8

[0049] With embodiment 1, just change the cyclohexylbenzene of anti-overcharge additive into p-xylylene dimethyl ether, change the trifluoromethyl phosphate of flame retardant into 2,2,2-trifluoroethyl phosphate, and The ethylene carbonate in the film-forming additive is replaced by 1,3-propiolactone sulfonate, the propylene sulfite is replaced by vinyl sulfite, LiPF 6 Replaced by Li(CF 3 SO 2 ) 2 N and do the various tests described in Example 1 with regard to the resulting electrolyte.

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Abstract

This invention relates to dynamic lithium ion battery electrolyte and to one safe dynamic high capacity lithium ion electrolyte and discloses the following components: w/w carbonic acid esters agent composed of vinylene carbonate less than 40 percentage; propylene carbonate less than 20 percentage; methyl propionate less than 40 percentage; propylene carbonate less than 40 percentage; lithium salt 10-16 percentage to prevent additive agent phenylcyclohexyl, p-methyl peroxide, phthalandione or fluoride content less than 12 percentage or combustion inhibitor less than 10 percentage and film addictive agent less than 5 percentage.

Description

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Claims

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Application Information

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Owner GUANGZHOU TINCI MATERIALS TECH
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