Lithium ion battery with nickel-based cathode, and electrolyte therefor

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low solubility, low concentration and conductivity, poor low-temperature performance electrolyte system, etc., to improve high-temperature performance, low-temperature The effect of excellent performance and good high temperature performance
CN103208653AActive Publication Date: 2013-07-17DONGGUAN AMPEREX TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGGUAN AMPEREX TECH
Publication Date
2013-07-17

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Abstract

The invention belongs to the technical field of lithium ion batteries and particularly relates to electrolyte for a lithium ion battery with a nickel-based cathode. The electrolyte comprises non-aqueous organic solvent, lithium salt, boron-containing lithium salt additive, cyclic ether compound and cyclic phosphonitrile compound. The cyclic phosphonitrile compound is hexaphenoxycyclotriphosphazene or cyclic phosphonitrile derivative. Compared with the prior art, the electrolyte is provided with the boron-containing lithium salt additive capable of improving high temperature performance of the lithium ion secondary battery with nickel-based cathode material, the cyclic phosphonitrile compound, and the cyclic ether compound, and the addition of the cyclic phosphonitrile compound and the cyclic ether compound enables the battery to be fine in high temperature performance, low temperature performance and cycle performance. In addition, the invention discloses the lithium ion battery comprising the electrolyte.
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Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an electrolytic solution for a nickel-based cathode lithium ion battery and a lithium ion battery containing the electrolytic solution. Background technique

[0002] In recent years, the rapid development of electronic products has promoted the rapid growth of lithium-ion batteries, and also put forward higher energy density requirements for lithium-ion batteries, and also requires lithium-ion batteries to be able to work normally in harsh environments, such as in It can charge and discharge normally under high temperature (-80°C) and low temperature (-20°C) environments.

[0003] Lithium-ion batteries containing nickel-based cathode materials have the advantages of large capacity, high voltage platform, and good safety. However, the existing electrolyte system is difficult to fully meet the industrial application of lithium-ion batteries using nickel-ba...

Claims

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