CPC H01M 4/582 (2013.01) [H01M 4/136 (2013.01); H01M 4/382 (2013.01); H01M 10/0562 (2013.01); H01M 10/425 (2013.01); H01M 50/46 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01)] | 10 Claims |
1. A secondary battery comprising:
a positive electrode including a halide, the halide including at least one metal element selected from the group consisting of copper, iron, nickel, cobalt, tin, and zinc, as a positive electrode active material;
a negative electrode including at least one selected from the group consisting of lithium metal, a lithium alloy, and a compound capable of having Li inserted and extracted, as a negative electrode active material;
a first nonaqueous electrolyte formed of an ionic liquid including chlorine ions comprising a non-chloroaluminate-based ionic liquid and the first nonaqueous electrolyte being in contact with the positive electrode;
a second nonaqueous electrolyte including lithium ions that is different from the ionic liquid including chlorine ions, and is in contact with the negative electrode; and
a separator having lithium ion conductivity and being interposed between the positive electrode and the negative electrode, and
wherein the separator having lithium ion conductivity allows only lithium ions to permeate.
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