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High-temperature resistant lithium ion electrolyte

An electrolyte and lithium battery technology, which is applied in secondary batteries, circuits, electrical components, etc., can solve the problem that the electrolyte system cannot meet the requirements of use, and achieves the improvement of the dispersion voltage, the high and low temperature performance, and the electrical conductivity. Effect

Active Publication Date: 2018-04-13
SHIJIAZHUANG SAN TAI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Liquid organic electrolyte is the most commonly used, but with the continuous expansion of the application range of batteries, people's requirements for all aspects of batteries continue to increase, and the original electrolyte system can no longer meet the requirements

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] High temperature resistant lithium-ion battery electrolyte, including an organic solvent composed of ethylene carbonate, dimethyl carbonate, and methyl ethyl carbonate with a volume ratio of 6:3:1; LiPF with an organic solvent concentration of 1mol / L 6 Lithium salt; 1,2-bis(trimethylsilyl)ethylene accounting for 0.05% of the mass of the battery electrolyte.

Embodiment 2

[0024] High temperature resistant lithium-ion battery electrolyte, including an organic solvent composed of ethylene carbonate, dimethyl carbonate, and methyl ethyl carbonate with a volume ratio of 4:3:3; LiBF with an organic solvent concentration of 1.5mol / L 4 Lithium salt; 2,4,6-trivinyl-2,4,6-trimethylcyclotrisiloxane accounting for 0.08% of the mass of the battery electrolyte.

Embodiment 3

[0026] High temperature resistant lithium-ion battery electrolyte, including an organic solvent composed of ethylene carbonate, dimethyl carbonate, and methyl ethyl carbonate with a volume ratio of 3:3:4; Li with an organic solvent concentration of 1.3mol / L (CF 3 SO 2 )N 2 Lithium salt; 1,2-bis(trimethylsilyl)ethylene accounting for 0.1% of the mass of the battery electrolyte.

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Abstract

A high-temperature resistant lithium ion electrolyte belongs to the technical field of a lithium battery electrolyte and comprises a lithium salt and an organic solvent and also comprises 1,2-bi(trimethylsilyl) ethylene, 1,3-dimethyl-1,1,3,3-tetraethylene disiloxane, 2,4,6-triethylene-2,4,6-trimethylcyclotrisiloxane or 1,3-divinyl-1,1,3,3-tetramethyl-disilazane. In the battery electrolyte, the charge-discharge performance of a lithium battery can be effectively improved due to addition of the substance into the electrolyte, side reaction is reduced, so that the battery bubbling is reduced, andthe cycle lifetime of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of lithium battery electrolyte, and relates to a high temperature resistant lithium battery electrolyte. The battery electrolyte of the invention can increase the cycle performance and recovery performance of the battery at high temperature. Background technique [0002] Lithium-ion batteries are widely used in various electronic devices such as notebook computers, mobile phones, and MP4s because of their advantages such as high working voltage, high energy density, environmental friendliness, stable cycle, and safety. However, with the improvement of battery capacity in electronic equipment, people have put forward higher requirements for the working voltage and energy density of lithium-ion batteries. However, as the working environment has higher requirements for moisture temperature, the high moisture content in the electrolyte will accelerate its reaction with the electrolyte, and the generation of HF ...

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 闫鹏飞刘鹏葛建民
Owner SHIJIAZHUANG SAN TAI CHEM CO LTD
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