Lithium supplementing composition, lithium supplementing electrolyte and lithium supplementing method for lithium secondary battery

A lithium secondary battery and electrolyte technology, which is applied in the field of lithium supplementation composition and lithium secondary battery lithium supplementation, can solve the problems of low Coulombic efficiency, poor cycle performance, and high activity of lithium supplementation, so as to alleviate the low Coulombic efficiency and cost Low, the effect of ensuring production safety
CN112448037AInactive Publication Date: 2021-03-05GUANGZHOU TINCI MATERIALS TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGZHOU TINCI MATERIALS TECH
Publication Date
2021-03-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of lithium ion batteries, and provides a lithium supplementing composition which comprises a lithium supplementing compound and a cosolvent, and the lithium supplementing compound is lithium nitride and / or lithium oxalate; and the cosolvent is at least one of tris (pentafluorophenyl) borane, tris (pentafluorophenyl) phosphine and tris (pentafluorophenyl) silane. After the lithium supplementing composition is used for the lithium supplementing electrolyte, the lithium supplementing electrolyte has high lithium supplementing activity, the problems oflow initial coulombic efficiency and poor cycle performance of the silicon-based negative electrode lithium ion battery can be effectively solved, and the energy density of the lithium ion battery isobviously improved. Meanwhile, the invention also provides a lithium supplementing method based on the lithium supplementing electrolyte.
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Description

technical field

[0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-replenishing composition, a lithium-replenishing electrolyte, and a lithium-replenishing method for a lithium secondary battery. Background technique

[0002] The energy crisis is one of the most important issues facing human society at present, and the collection, storage and transportation of new clean energy has attracted the attention of the whole society. As an important medium for electric energy conversion and storage, lithium-ion batteries have the advantages of high energy density, good cycle stability, wide working potential window, high safety, and environmental friendliness. They are widely used in portable electronic products, large-scale energy storage, and electric vehicles. and other fields. With the rapid development of new energy vehicles, the improvement of cruising range puts forward higher requirements on the energy density of batteri...

Claims

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