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An electrolyte additive and electrolyte and lithium ion battery containing the additive

An electrolyte additive and electrolyte technology, applied in the field of lithium ion batteries and electrolytes, to achieve the effect of improving high-voltage cycle performance and capacity retention rate, and increasing the scope of application

Active Publication Date: 2016-01-20
JIANGSU HUADONG INST OF LI ION BATTERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, no reports have been found to improve the electrochemical window of the electrolyte by adding additives to the electrolyte.

Method used

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  • An electrolyte additive and electrolyte and lithium ion battery containing the additive
  • An electrolyte additive and electrolyte and lithium ion battery containing the additive
  • An electrolyte additive and electrolyte and lithium ion battery containing the additive

Examples

Experimental program
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Effect test

Embodiment

[0034] Take 1.0mol / L LiPF 6 Soluble in ethylene carbonate (EC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC) mixed solvent (volume ratio EC / DEC / EMC=1 / 1 / 1), add 1% (mass percentage) of , fully stirred to make it uniform, and degassed to obtain an electrolyte, which was injected into the positive electrode material (LiCoO 2 ), a negative electrode material (Li) and a separator composed of a lithium-ion battery.

[0035] see figure 1 , figure 1 is the linear potential scanning curve of the electrolyte in the present embodiment obtained by the linear potential scanning method, from figure 1It can be seen that the electrochemical window of the electrolyte in this implementation can reach about 5V, which is larger than that of the current conventional electrolyte, that is, about 4.5V.

[0036] Please also refer to figure 2 , figure 2 It is a charge-discharge cycle comparison chart of an electrolyte battery without additives as a comparative example and an electroly...

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Abstract

The present disclosure provides an electrolyte additive. The electrolyte additive comprises: maleimide derivative, bis-maleimide derivative, or combinations there of The structural formulas of maleimide derivative and bis-maleimide derivative respectively are: wherein, R1, R2 are selected from hydrogen atom and halogen atoms, R3 is selected from silicon containing group, nitrogen containing group, fluorine containing group, phosphorus containing group, and a repeating ethoxy group. The present disclosure also provides an electrolyte liquid and a lithium ion battery using the electrolyte additive.

Description

technical field [0001] The invention relates to an electrolyte additive, an electrolyte and a lithium ion battery using the additive. Background technique [0002] At present, with the rapid development of electric vehicles and portable electronic devices such as mobile phones, digital cameras and notebook computers, the market demand for high-power, high-energy-density batteries is increasing. Lithium-ion battery is the battery with the highest voltage and the largest energy density among the batteries that have been commercialized so far, and has a good development prospect. However, with the increasing application of lithium-ion batteries in electric vehicles, hybrid vehicles, cordless power tools and military, there are higher requirements for the working voltage and energy density of lithium-ion batteries. [0003] Lithium-ion batteries are mainly composed of electrodes, separators, and electrolytes. The electrolyte is an important part of the battery, and its stable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567
CPCH01M10/0525H01M10/0567H01M10/052Y02E60/10C07F7/0838H01M2220/20H01M2220/30
Inventor 杨聚平何向明王莉李建军尚玉明高剑王要武郭建伟
Owner JIANGSU HUADONG INST OF LI ION BATTERY
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