Li4Ti5O12, Li(4-a)ZaTi5O12 OR Li4ZbetaTi(5-beta)O12 particles, process for obtaining same and use as electrochemical generators

a technology of li4ti5o12 and li4a zati5o12, which is applied in the field of new particles, can solve the problems of limited structure and very slight sacrifice capacity of li4ti5o12, and achieve the effects of reducing the cost of production and maintenance, and improving the efficiency of production
US20070243467A1Inactive Publication Date: 2007-10-18HYDRO QUEBEC CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
HYDRO QUEBEC CORP
Publication Date
2007-10-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

Synthesis process for new particles of Li4Ti5O12, Li(4-α)ZαTi5O12 or Li4ZβTi(5-β)O12, preferably having a spinel structure, wherein β is greater than 0 and less than or equal to 0.5 (preferably having a spinel structure), a representing a number greater than zero and less than or equal to 0.33, Z representing a source of at least one metal, preferably chosen from the group made up of Mg, Nb, Al, Zr, Ni, Co. These particles coated with a layer of carbon notably exhibit electrochemical properties that are particularly interesting as components of anodes and / or cathodes in electrochemical generators.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to new particles based on Li4Ti5O12, based on Li(4-α)ZαTi5O12, or based on Li4ZβTi(5-β)O12.

[0002] The present invention also relates to processes that make it possible to prepare these particles and to their use, especially in the area of electrochemical devices such as electrochemical generators. DESCRIPTION OF PRIOR ART

[0003] Marketing of the lithium-ion battery by Sony, in 1990, was reported by Naguara and Tozawa, Prog. Batt. Solar Cells, 9 (1990), 209. It made possible an expansion and a significant breakthrough of batteries into the area of portable devices (telephone, computer). The technology of Li-ion batteries is based on lithium intercalation electrodes, in particular the anode which is made of graphite. At the time of the first charge, a passivation film is formed on the carbon surface. The chemistry and the composition of this passivation film are complex. The electrochemical formation protocol for this film r...

Claims

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