Methods of manufacturing active material and electrode, active material, and electrode
AssigneeTDK Corporation
InventorsHisashi SUZUKI, Masayoshi Hirano
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Abstract
An active material, an electrode, and a battery which exhibit high safety in overcharging tests, and methods of manufacturing them are provided. The active material comprises a first metal oxide particle 1 and a second metal oxide particle group 2 attached to a surface of the first metal oxide particle 1. The second metal oxide is at least one selected from the group consisting of zirconia, silica, and tin oxide. The first metal oxide particle 1 contains fluorine atoms from its surface to deepest part.
Claims12
An active material comprising a particle of a first metal oxide and a particle group of a second metal oxide attached to a surface of the particle of the first metal oxide;
- wherein the second metal oxide is at least one selected from the group consisting of zirconia, silica, and tin oxide;
- and
- wherein the particle of the first metal oxide contains fluorine atoms from a surface thereof to a deepest part thereof.
A method of manufacturing an active material, the method comprising the step of bringing a particle of a first metal oxide into contact with an aqueous solution containing a fluoro complex of at least one metal selected from the group consisting of zirconium, silicon, and tin in a vessel made of a polymer.
A method of manufacturing an electrode, the method comprising the step of bringing an electrode comprising an active material layer containing a particle of a first metal oxide, a conductive auxiliary, and a binder into contact with an aqueous solution containing a fluoro complex of at least one metal selected from the group consisting of zirconium, silicon, and tin in a vessel made of a polymer
Dependencies are inferred from the claim text.