Cathode material and battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTadaaki Matsumura, Izuru Sasaki, Yuta Sugimoto
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Abstract
Provided is a cathode material including a cathode active material; a coating layer which coats at least a part of a surface of the cathode active material, and which includes a first solid electrolyte material; and a second solid electrolyte material. The first solid electrolyte material includes Li, M, and X; however, does not include sulfur. M includes at least one element selected from the group consisting of metalloid elements and metal elements other than Li. X includes at least one element selected from the group consisting of Cl and Br.
Claims3
A cathode material, comprising:
- a cathode active material particle;
- a coating layer that coats a surface of the cathode active material particle and comprises a first solid electrolyte material;
- and
- a second solid electrolyte material particle comprising a sulfide solid electrolyte,
- wherein:
- the first solid electrolyte material is represented by Li2MgX4, Li2FeX4, Li(AlaGabInc)X4, Li3(AlaGabInc)X6, where 0≤a≤1, 0≤b≤1, 0≤c≤1, a+b+c=1, or a composition formula LiαMβX6,
- where 2.5≤α≤3, and 1≤β≤1.1 are satisfied,
- M includes at least one element selected from the group consisting of Mg, Al, Ca, Sc, Ti, Zn, Ga, Sr, Y, Zr, Nb, Sn, Ba, Hf, Ta, Bi, B, Si, Ge, As, Sb, and Te, and
- X includes at least one element selected from the group consisting of Cl and Br,
- the sulfide solid electrolyte comprises at least one selected from the group consisting of Li2S—P2S5, Li2S—SiS2, Li2S—B2S3, Li2S—GeS2, Li3.25Ge0.25P0.75S4, and Li10GeP2S12,
- the cathode active material particle and the second solid electrolyte material particle are at least partly separated by the coating layer, and
- the cathode active material particle comprises a lithium nickel-cobalt-manganese oxide.
A battery, comprising:
- a cathode including a cathode material;
- an anode;
- and
- an electrolyte layer provided between the cathode and the anode,
- wherein the cathode material comprises:
- a cathode active material particle;
- a coating layer that coats a surface of the cathode active material particle and comprises a first solid electrolyte material;
- and
- a second solid electrolyte material particle comprising a sulfide solid electrolyte,
- wherein:
- the first solid electrolyte material is represented by Li2MgX4, Li2FeX4, Li(AlaGabInc)X4, Li3(AlaGabInc)X6, where 0≤a≤1, 0≤b≤1, 0≤c≤1, a+b+c=1, or a composition formula LiαMβX6,
- where 2.5≤α≤3, and 1≤β≤1.1 are satisfied,
- M includes at least one element selected from the group consisting of Mg, Al, Ca, Sc, Ti, Zn, Ga, Sr, Y, Zr, Nb, Sn, Ba, Hf, Ta, Bi, B, Si, Ge, As, Sb, and Te, and
- X includes at least one element selected from the group consisting of Cl and Br,
- the sulfide solid electrolyte comprises at least one selected from the group consisting of Li2S—P2S5, Li2S—SiS2, Li2S—B2S3, Li2S—GeS2, Li3.25Ge0.25P0.75S4, and Li10GeP2S12,
- the cathode active material particle and the second solid electrolyte material particle are at least partly separated by the coating layer, and
- the cathode active material particle comprises a lithium nickel-cobalt-manganese oxide, and
- wherein the electrolyte layer comprises at least one sulfide solid electrolyte material selected from the group consisting of Li2S—P2S5, Li2S—SiS2, Li2S—B2S3, Li2S—GeS2, Li3.25Ge0.25P0.75S4, and Li10GeP2S12.
Dependencies are inferred from the claim text.