Negative electrode material for lithium ion batteries containing surface-fluorinated b-type titanium oxide powder, method for producing same, and lithium ion battery using same

Negative electrode material for lithium ion batteries containing surface-fluorinated b-type titanium oxide powder, method for producing same, and lithium ion battery using same

The present invention addresses the problem of providing a B-type titanium oxide (TiO2(B)) powder which can be suitable for use as a negative electrode material for lithium ion batteries by improving the charge and discharge characteristics and the rate characteristics of the B-type titanium oxide p...

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Hauptverfasser: INABA MINORU, TASAKA AKIMASA, TAKEBAYASHI HITOSHI, SAITO MORIHIRO, SYODAI YOSHIO, TAKAGI MIKIHIRO
Format: Patent
Sprache:chi ; eng
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BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRICITY
INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS
INORGANIC CHEMISTRY
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator INABA MINORU
TASAKA AKIMASA
TAKEBAYASHI HITOSHI
SAITO MORIHIRO
SYODAI YOSHIO
TAKAGI MIKIHIRO
description The present invention addresses the problem of providing a B-type titanium oxide (TiO2(B)) powder which can be suitable for use as a negative electrode material for lithium ion batteries by improving the charge and discharge characteristics and the rate characteristics of the B-type titanium oxide powder by a simple treatment. A surface-fluorinated B-type titanium oxide powder is obtained by reacting a B-type titanium oxide powder in a fluorine-containing gas atmosphere at 0-200 DEG C for 1 minute to 10 days. The fluorination treatment is preferably carried out at 0.01-2 atm. It is preferable to use, as the fluorine-containing gas, a gas that contains a fluorine compound, said gas being selected from among a fluorine (F2) gas, a nitrogen trifluoride (NF3) gas, a perfluorotrimethylamine (N(CF3)3) gas, a chlorine trifluoride (ClF3) gas and the like.
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A surface-fluorinated B-type titanium oxide powder is obtained by reacting a B-type titanium oxide powder in a fluorine-containing gas atmosphere at 0-200 DEG C for 1 minute to 10 days. The fluorination treatment is preferably carried out at 0.01-2 atm. 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subjects BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRICITY
INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS
INORGANIC CHEMISTRY
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title Negative electrode material for lithium ion batteries containing surface-fluorinated b-type titanium oxide powder, method for producing same, and lithium ion battery using same
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