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US 10,483,589 B2Granted
Lithium-ion secondary battery
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsKouji Oono, Takao Kitagawa
Life of this patent
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Abstract
A lithium-ion secondary battery of the present invention includes a cathode including an electrode material having electrode active material particles and an oxide coat and a carbonaceous film which coat surfaces of the electrode active material particles, an anode including a carbon-based active material, and an electrolytic solution, and the electrolytic solution does not substantially include additives for stabilizing a coat formed on a surface of the anode.
Claims13
A lithium-ion secondary battery comprising:
- a cathode comprising an electrode material, the electrode material comprising
- electrode active material particles represented by a formula:
- LixAyDzPO4
- in which A represents at least one selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, D represents at least one selected from the group consisting of Mg, Ca, S, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y, and rare earth elements, 0<x<2, 0<y<1.5, and 0≤z<1.5, and
- a combination of an oxide coat and a carbonaceous film, which coats surfaces of the electrode active material particles so that islands formed of the oxide coat are present in a sea formed of the carbonaceous film on the surfaces of the electrode active material particle;
- an anode comprising a carbon-based active material;
- and an electrolytic solution;
- and wherein the electrolytic solution comprises 0.1% by mass or less of additives for stabilizing a coating formed on a surface of the anode.
5 more elements
Dependencies are inferred from the claim text.