Graphene, power storage device, and electric device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsTakuya HIROHASHI, Teppei OGUNI
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Abstract
An object is to provide graphene which has high conductivity and is permeable to ions of lithium or the like. Another object is to provide, with use of the graphene, a power storage device with excellent charging and discharging characteristics. Graphene having a hole inside a ring-like structure formed by carbon and nitrogen has conductivity and is permeable to ions of lithium or the like. The nitrogen concentration in graphene is preferably higher than or equal to 0.4 at. % and lower than or equal to 40 at. %. With use of such graphene, ions of lithium or the like can be preferably made to pass; thus, a power storage device with excellent charging and discharging characteristics can be provided.
Claims13
(canceled)
A method of manufacturing an electrode of a power storage device comprising:
- forming a graphene oxide on a particle;
- and
- reducing the graphene oxide by heat treatment in an atmosphere containing nitrogen so that a graphene doped with nitrogen is formed on the particle,
- wherein the graphene comprises at least one hole inside a ring-like structure formed by carbon and nitrogen.
A method of manufacturing an electrode of a power storage device comprising:
- forming a mixture containing a graphene oxide and a particle;
- heating the mixture to reduce the graphene oxide and form a graphene on the particle;
- and
- adding nitrogen to the graphene after performing the heating,
- wherein the graphene comprises at least one hole inside a ring-like structure formed by carbon and nitrogen.
Dependencies are inferred from the claim text.