Patent · US Active

Method of preparing cathode for secondary battery

US9991504B2 · kind B2 · utility

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2References

18Claims

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Assignee

GRST International Limited · CN

Inventors

Kam Piu Ho
Ranshi Wang · Sha Tin, CN
Peihua Shen · Tangxia, CN

Key dates

Filing date	Jan 12, 2017
Grant date	Jun 5, 2018
Priority date	—
Expiry date	Jan 12, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Provided herein is a method for preparing a cathode electrode based on an aqueous slurry. The invention provides a cathode slurry comprising a cathode material especially high Ni ternary cathode material with improved water stability. The cathode material shows lower tendencies for pH change when applied in the aqueous slurry. The lower processing temperatures may avoid the undesirable decomposition of cathode material having high nickel and/or manganese content. In addition, the batteries having the electrodes prepared by the method disclosed herein show impressive energy retention. The capacity retention of the battery is not less than 60% of its initial capacity after 2 weeks of high temperature storage.

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