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Lithium battery electrolyte

An electrolyte and lithium battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of volume expansion, conductivity limitation, low volume effect, etc., and achieve the effect of improving cycle life and inhibiting expansion

Inactive Publication Date: 2018-07-06
SHANDONG HIRONG POWER SUPPLY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicon has serious volume expansion (about 300%) during charge and discharge, and the huge volume effect and low conductivity limit the commercial application of silicon anode technology.

Method used

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Embodiment Construction

[0030] The invention discloses an electrolyte solution for a lithium battery, and those skilled in the art can learn from the content of this article and appropriately improve process parameters to realize it. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and the relevant personnel can obviously make changes or appropriate changes and combinations to the method and application described herein without departing from the content, spirit and scope of the present invention to realize and Apply the technology of the present invention.

[0031] Below in conjunction with embodiment, further set forth the present invention:

[0032] The present invention exemplifies the component contents of 1 to 55 kinds of lithium battery electrol...

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Abstract

The invention provides a lithium battery electrolyte. The lithium battery electrolyte comprises lithium salt, a carbonate organic solvent, a carboxylate organic solvent, a silicon-carbon-type functional additive and other film-forming additive, wherein the molar concentration of the lithium salt component in the lithium battery electrolyte ranges from 0.1-2mol / L; the molar concentration of the other film-forming additive component in the lithium battery electrolyte ranges from 0-0.5mol / L; the mass percentage of the silicon-carbon-type functional additive component in the lithium battery electrolyte ranges from 1-10%. According to the technical scheme adopted by the invention, the stability of the electrolyte in a silicon-carbon-type lithium battery is improved, expansion of the lithium battery is suppressed, and thus the cycle life of the lithium battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery electrolyte. Background technique [0002] With the rapid development of the needs of the times, the energy density requirements for lithium-ion batteries are gradually increasing. In 2016, my country released a hard indicator of power battery energy density. According to the "Energy Saving and New Energy Vehicle Technology Roadmap", the energy density target of pure electric vehicle power batteries in 2020 is 350W h / kg. In order to meet the energy demand of the new generation, it is imminent to develop new lithium battery anode technology. [0003] Silicon can be alloyed with lithium at room temperature to form Li 15 Si 4 Phase, the theoretical specific capacity is as high as 3572mA h / g, which is much higher than the theoretical specific capacity of commercial graphite (372mA h / g), and it is one of the most promising anode materials for next-genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 刘永李立飞任海赵志华郭庆元李思朋黄运涛
Owner SHANDONG HIRONG POWER SUPPLY MATERIAL
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