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US 2016/0079600 A1Published application
Manufacturing method of composite oxide and manufacturing method of power storage device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsTakuya MIWA, Kuniharu NOMOTO, Junpei MOMO
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Abstract
An object is to reduce variation in shape of crystals that are to be formed. Solutions containing respective raw materials are made in an environment where an oxygen concentration is lower than that in air, the solutions containing the respective raw materials are mixed in an environment where an oxygen concentration is lower than that in air to form a mixture solution, and with use of the mixture solution, a composite oxide is formed by a hydrothermal method.
Claims19
(canceled)
A power storage device comprising:
- a positive electrode comprising a positive electrode current controller and a positive electrode active material layer on the positive electrode current controller,
- wherein the positive electrode active material layer comprises graphene and a plurality of crystals of composite oxide which is represented by a general formula LiMPO4,
- wherein M denotes a transition metal selected from the group consisting of Fe, Co, Ni, and Mn,
- wherein the plurality of crystals is covered with the graphene, and
- wherein each of the plurality of crystals has a crystal shape of a rectangular solid.
2 more elements
A power storage device comprising:
- a positive electrode comprising a positive electrode current controller and a positive electrode active material layer on the positive electrode current controller,
- wherein the positive electrode active material layer comprises graphene and a plurality of crystals of composite oxide which is represented by a general formula LiMPO4,
- wherein M denotes a transition metal selected from the group consisting of Fe, Co, Ni, and Mn,
- wherein the graphene is multilayer graphene including 2 to 100 graphene sheets,
- wherein the plurality of crystals are provided between the graphene sheets, and
- wherein each of the plurality of crystals has a crystal shape of a rectangular solid.
3 more elements
Dependencies are inferred from the claim text.