Lithium titanate particles and process for producing the lithium titanate particles, Mg-containing lithium titanate particles and process for producing the Mg-containing lithium titanate particles, negative electrode active substance particles for non-aqueous electrolyte secondary batteries, and non-aqueous electrolyte secondary battery

US9847526B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9847526-B2
Application numberUS-201615019322-A
CountryUS
Kind codeB2
Filing dateFeb 9, 2016
Priority dateAug 31, 2010
Publication dateDec 19, 2017
Grant dateDec 19, 2017

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  2. Abstract

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Abstract

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According to the present invention, there are provided lithium titanate particles which exhibit an excellent initial discharge capacity and an enhanced high-efficiency discharge capacity retention rate as an active substance for non-aqueous electrolyte secondary batteries and a process for producing the lithium titanate particles, and Mg-containing lithium titanate particles.

First claim

Opening claim text (preview).

The invention claimed is: 1. Lithium titanate particles with a spinel structure, having a crystal distortion of not more than 0.0015 as determined according to a Rietveld analysis of XRD pattern of the lithium titanate particles, and a crystallite size of 80 to 300 nm. 2. Negative electrode active substance particles for non-aqueous electrolyte secondary batteries comprising the lithium titanate particles as defined in claim 1 . 3. The negative electrode active substance particles for non-aqueous electrolyte secondary batteries according to claim 2 which are used in the form of a composition comprising 90 parts by weight of the negative electrode active substance particles, 5 parts by weight of a conductive assistant, and 5 parts by weight of a binder, wherein in a cell comprising the negative electrode active substance particles in the form of the composition and metallic lithium as a counter electrode, when a charging direction of the cell is the direction in which lithium is released, an initial discharge capacity of the cell is not less than 165 mAh/g, and an output characteristic of the cell as a discharge capacity ratio between 10C and 0.1C assuming that a C-rate upon measurement of the initial discharge capacity is 0.1C is not less than 85%. 4. A non-aqueous electrolyte secondary battery comprising the negative electrode active substance particles as defined in claim 2 .

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What does patent US9847526B2 cover?
According to the present invention, there are provided lithium titanate particles which exhibit an excellent initial discharge capacity and an enhanced high-efficiency discharge capacity retention rate as an active substance for non-aqueous electrolyte secondary batteries and a process for producing the lithium titanate particles, and Mg-containing lithium titanate particles.
Who is the assignee on this patent?
Toda Kogyo Corp
What technology area does this patent fall under?
Primary CPC classification H01M4/485. Mapped technology areas include Electricity.
When was this patent published?
Publication date Tue Dec 19 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).