Patent · US Active

Surface modified lithium titanate and preparation method thereof

US9546189B2 · kind B2 · utility

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2References

6Claims

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Assignee

NINGDE AMPEREX TECHNOLOGY LIMITED · CN

Inventors

Chuanmiao Yan · Jiaocheng District, CN
Kaifu Zhong · Jiaocheng District, CN

Key dates

Filing date	Nov 5, 2013
Grant date	Jan 17, 2017
Priority date	—
Expiry date	Jan 16, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A surface modified lithium titanate and preparation method thereof is provided. In the surface modified lithium titanate, the deactivating groups distributed on the surface of the lithium titanate are —O—P—RR′R″, —O—P—(OR)R′R″, —O—P—(OR)(OR′)R″, and —O—P—(OR)(OR′)(OR″), where R, R′ and R″ are identical or different C1˜C8 alkyl or alkenyl groups. The deactivating groups are bonded to the lithium titanate via a bond or a bridge. The exemplary surface modified lithium titanate can effectively lower its catalytic activity, reduce the gassing of lithium ion batteries, and therefore improve the high temperature storage and high temperature cycle performance of lithium titanate batteries. The exemplary preparation method is simple, has great repeatability, a low cost, low pollution to the environment, and is suitable for industrial production.

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