Substance and battery including the same
AssigneeSony Corporation
InventorsYoshinori Gamoh, Hiroshi Imoto
Life of this patent
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Abstract
A substance includes an oxide including at least one element selected from the group including cobalt Co, nickel Ni, manganese Mn, iron Fe, and copper Cu; and silicon Si chemically bonded to the surface of the oxide. Also, a battery includes a cathode, an anode, and an electrolyte, wherein the cathode includes an oxide including at least one selected from the group including cobalt Co, nickel Ni, manganese Mn, iron Fe, and copper Cu; and a substance including silicon Si chemically bonded to the surface of the oxide.
Claims16
A cathode active material comprising:
- oxide particles, the oxide including an element selected from the group consisting of cobalt, nickel, manganese, iron, and copper;
- and
- silicon chemically bonded to a surface of said oxide particles,
- wherein a bonding state of silicon on the surface of said oxide particles is M1-O—Si—R or M1-O—Si—O, wherein M1 represents the element included in the oxide and R represents a carbon chain or a carbon chain having a functional group,
- wherein an element ratio of said silicon on the surface of said oxide particles is 3% or more and 90% or less, and
- wherein the average particle size of the oxide particles is 0.005 μm or more and 0.5 μm or less.
A battery comprising a cathode, an anode, and an electrolyte, wherein said cathode includes a cathode active material comprising:
- oxide particles, the oxide including an element selected from the group consisting of cobalt, nickel, manganese, iron, and copper;
- and
- silicon chemically bonded to a surface of said oxide particles,
- wherein a bonding state of silicon on the surface of said oxide particles is M1-O—Si—R or M1-O—Si—O, wherein M1 represents the element included in the oxide and R represents a carbon chain or a carbon chain having a functional group,
- wherein an element ratio of said silicon on the surface of said oxide particles is 3% or more and 90% or less, and
- wherein the average particle size of said oxide particles is 0.005 μm or more and 0.5 μm or less.
Dependencies are inferred from the claim text.