Patent ID: 11923502
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 26:
27. An all-solid secondary battery comprising:
a solid electrolyte layer disposed between an anode layer and a cathode layer,
wherein the solid electrolyte layer comprises a first solid electrolyte layer comprising a first solid electrolyte and a second solid electrolyte layer comprising a second solid electrolyte,
wherein the first solid electrolyte layer is disposed proximate to the anode layer,
the second solid electrolyte layer is disposed proximate to the cathode layer,
the first solid electrolyte has a lithium ion conductivity greater than a lithium ion conductivity of the second solid electrolyte, and
wherein the solid electrolyte layer has an argyrodite structure represented by Formula 6:

Li+12-n-xAX6-xY′x  Formula 6

wherein, in Formula 6,
A is P, As, Ge, Ga, Sb, Si, Sn, Al, In, Ti, V, Nb, Ta, or a combination thereof,
X is S, Se, Te, or a combination thereof,
Y′ is Cl, Br, I, F, CN, OCN, SCN, N3, or a combination thereof,
1≤n≤6 and 0≤x≤2, wherein n is an oxidation number of A.