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High-performance lithium battery electrolyte

An electrolyte and lithium battery technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve the problem that the electrolyte system cannot meet the requirements of use

Active Publication Date: 2018-04-20
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

[0023] 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; ethylene glycol dibenzenesulfonate accounting for 0.05% of the mass of the battery electrolyte.

Embodiment 2

[0025] 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; phenyl benzenesulfonate accounting for 0.08% of the mass of the battery electrolyte.

Embodiment 3

[0027] 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 3:4:3; Li with an organic solvent concentration of 1.3mol / L (CF 3 SO 2 )N 2 Lithium salt; allyl benzenesulfonate accounting for 0.1% of the mass of the battery electrolyte.

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Abstract

A high-performance lithium battery electrolyte belongs to the technical field of lithium battery electrolytes. The high-performance lithium battery electrolyte comprises a lithium salt and an organicsolvent and also comprises a compound shown in the specification and / or a compound shown in the specification, wherein R1 is selected from alkyl, H or F, and R2 is selected from allyl, propargyl or benzene. Due to the addition of the substance in the battery electrolyte, the charge-discharge performance of a lithium battery can be effectively improved, side reaction is reduced, so that battery swelling is reduced, and the 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 present invention can increase the cycle performance and recovery performance of the battery at high temperatures. The combination of the electrolyte components of the present invention can effectively improve the charge and discharge performance of the lithium battery, reduce the occurrence of side reactions, and thereby reduce battery flatulence , improve battery cycle life. 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 fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0566H01M10/0567H01M10/4235Y02E60/10
Inventor 侯荣雪刘鹏张民
Owner SHIJIAZHUANG SAN TAI CHEM CO LTD
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