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Lithium ion battery and electrolyte thereof

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries and their electrolytes, can solve the problems of increased electrolyte side reactions, battery gas production, etc.

Inactive Publication Date: 2014-03-26
NINGDE AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such additives are easy to decompose at high temperature, and the acid produced tends to aggravate the side reactions in the electrolyte, eventually leading to gas production in the battery

Method used

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  • Lithium ion battery and electrolyte thereof
  • Lithium ion battery and electrolyte thereof
  • Lithium ion battery and electrolyte thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The electrolyte and lithium-ion battery were prepared in the same way as Comparative Example 1, except that 4-fluoro-5-methyl-1,3-dioxolane was added on the basis of Comparative Example 1 when preparing the electrolyte Cyclo-2-one is used as an additive, and its mass percent content in the non-aqueous electrolyte is 0.5%.

Embodiment 2

[0036] The electrolyte and lithium-ion battery were prepared in the same way as Comparative Example 1, except that 4-fluoro-5-methyl-1,3-dioxolane was added on the basis of Comparative Example 1 when preparing the electrolyte Cyclo-2-one is used as an additive, and its mass percent content in the non-aqueous electrolyte is 1%.

Embodiment 3

[0038] The electrolyte and lithium-ion battery were prepared in the same way as Comparative Example 1, except that 4-fluoro-5-methyl-1,3-dioxolane was added on the basis of Comparative Example 1 when preparing the electrolyte Cyclo-2-one is used as an additive, and its mass percentage in the non-aqueous electrolyte is 5%.

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PUM

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Abstract

The invention discloses a lithium ion battery and an electrolyte thereof. The electrolyte comprises a nonaqueous organic solvent, a lithium salt dissolved in the nonaqueous organic solvent, and an additive dispersed in the nonaqueous organic solvent, and the additive is composed of 1,3-propanesultone, 4-fluorine-5-alkyl substituted-1,3-dioxolame-2-one represented by a general formula I, wherein R in the formula I is an alkyl group containing 1-5 carbon atoms; the lithium ion battery adopts the electrolyte as an electrolyte. Because the compound represented by the general formula 1 is promoted to form a solid electrolyte interfacial film by virtue of 1,3-propanesultone, so as to effectively restrain the decomposition reaction of the electrolyte, so that the high-temperature memory property of the lithium ion battery can be improved obviously.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and more specifically, the invention relates to a lithium-ion battery with better high-temperature storage performance and an electrolyte thereof. Background technique [0002] At present, people have higher and higher requirements on the performance of electronic mobile devices such as notebook computers, mobile phones, handheld game consoles, and tablet computers. This increasing requirement also makes it necessary for us to further improve the characteristics of batteries. [0003] In daily life, factors such as the continuous use of electronic products and the increase in the temperature of the battery environment may cause the battery to be in a high temperature state. Because in a lithium-ion battery in a charged state, the cathode material has a reactivity similar to that of an oxidant, and the anode material has a reactivity similar to a reductant, and the use at high temperature or h...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCY02E60/122H01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 叶士特付成华褚春波王阿忠
Owner NINGDE AMPEREX TECH
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