Electrolytic solution for lithium ionic cell using lithium manganate as positive pole material

A technology for lithium-ion batteries and cathode materials, which is applied in secondary batteries, circuits, electrical components, etc., and can solve the problems of high battery prices and high prices

Active Publication Date: 2009-08-12
GREAT POWER BATTRY ZHUHAI
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Overpriced at this stage
Due to the price of cathode material, electrolyte and separator, the price level of the overall battery is relatively high

Method used

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  • Electrolytic solution for lithium ionic cell using lithium manganate as positive pole material
  • Electrolytic solution for lithium ionic cell using lithium manganate as positive pole material
  • Electrolytic solution for lithium ionic cell using lithium manganate as positive pole material

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Embodiment Construction

[0029] The present invention starts with the most basic solvent of the electrolyte, finds out a better solvent formula for lithium-ion batteries with lithium manganate as the positive electrode material, and then determines the better lithium salt concentration through experiments, and develops suitable functional additives. The following are respectively explained:

[0030] 1. Development of electrolyte solvent components.

[0031] This part mainly examines the conditions of several commonly used solvent systems. Since EC is an excellent film-forming solvent and an indispensable component in the electrolyte, the solvents we choose are EC (Ethylenecarbonate ethylene carbonate), PC (Propylene carbonate propylene carbonate), DMC (Dimethylcarbonate dimethyl carbonate), EMC (Ethyl methyl carbonate), DEC (Diethyl carbonate diethyl carbonate), MPC (methyl propylene carbonate) And DPC (Dipropylene carbonate dipropyl carbonate). Table 1 is the physical properties of the above-mentio...

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Abstract

The invention relates to an electrolyte for a lithium ion battery using lithium manganate as an anode material; the electrolyte starts from a most basic solvent; an optimal solvent formula EC+EMC+PC of the lithium ion battery using the lithium manganate as the anode material is found out; further, the optimal concentration of lithium salt is determined by experiment; and phenylsulfonyl, vinylene carbonate, toluene, biphenyl, butylene sulfite, bi-oxalic acid lithium borate and other functional additives are developed. The functional electrolyte which integrates cathode film forming, overcharge blockage, oxygen absorption and flame retardance into a whole and is used for the compounded type lithium ion battery is designed and developed; and on the basis of not influencing the capacity, the cycle life and other performances of the lithium ion battery, the electrolyte comprehensively solves the problem of safety of the battery in a 3C10V overcharging system and provides technical guarantee for the popularization and application of the lithium ion battery.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to an electrolyte solution of the lithium ion battery using lithium manganate as the positive active material. Background technique [0002] Lithium-ion batteries are the latest generation of rechargeable batteries after nickel-metal hydride (Ni-MH) batteries, which have high working voltage, small size, light weight, high specific energy, and long cycle life (the cycle life of lithium-ion batteries is much higher than Other batteries), safe and fast charging, low self-discharge rate, no memory effect (no need to discharge, long use time), wide operating temperature range (lithium-ion batteries can work between -20 ° C ~ +60 ° C) and other excellent characteristics . [0003] However, based on the unique electrochemical working principle of lithium-ion batteries and the inherent characteristics of electrodes and electrolyte materials, lithium-ion batteries also have some shortcomings, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/38
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 崔明许汉良黄赛先尹鸿章
Owner GREAT POWER BATTRY ZHUHAI
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