Patent · US Active

Modified graphite negative electrode material, preparation method thereof and secondary battery

US11114666B2 · kind B2 · utility

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1References

14Claims

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Assignee

NINGDE AMPEREX TECHNOLOGY LIMITED · CN

Inventors

Hang Cui · Fujian, CN
Taiqiang Chen · Fujian, CN
Yuansen XIE · Fujian, CN

Key dates

Filing date	Aug 23, 2019
Grant date	Sep 7, 2021
Priority date	—
Expiry date	Dec 30, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention provides a modified graphite negative electrode material, preparation method thereof and a secondary battery. The modified graphite negative electrode material includes a graphite and a multilayer graphene. The multilayer graphene are dispersed in the graphite. The multilayer graphene are loaded with a conductive agent by bonding of a binder. The modified graphite negative electrode material can achieve a higher compaction density for the negative electrode, and can effectively improve the lithium precipitation of the negative electrode of the secondary battery while improving the cycle performance of the secondary battery when being applied to the secondary battery.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.