Nonaqueous electrolyte secondary battery
View Patent ↗A nonaqueous electrolyte secondary battery includes a positive electrode capable of occluding and releasing lithium, a negative electrode including a negative electrode current collector and a negative electrode active material, and an electrolyte solution including a solvent. In the nonaqueous electrolyte secondary battery, the negative electrode active material includes metal zinc or an alloy of metal zinc. The solvent is composed only of vinylene carbonate.
1 . A nonaqueous electrolyte secondary battery comprising:
a positive electrode capable of occluding and releasing lithium;
a negative electrode including a negative electrode current collector and a negative electrode active material; and
an electrolyte solution including vinylene carbonate which is the only solvent in the electrolyte solution and LiPF 6 which is the only electrolyte salt in the electrolyte solution, wherein
the negative electrode active material is a metal film consisting of metal zinc or an alloy of metal zinc,
the metal film is disposed on the negative electrode current collector, and
a coating film formed by reductive polymerization of the vinylene carbonate is formed on a surface of the negative electrode.
2 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein
the metal film consists of the metal zinc.
3 . The nonaqueous electrolyte secondary battery according to claim 1 ,
wherein the metal film consists of at least one lithium-zinc alloy selected from the group consisting of Li 2 Zn 3 , LiZn 2 , LizZn 5 , LiZn 4 , and LiZn.
4 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein the metal film consists of the alloy of the metal zinc, and the alloy of the metal zinc includes at least one selected from the group consisting of Li 2 Zn 3 , LiZn 2 , LizZn 5 , and LiZn 4 .
5 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein the negative electrode current collector is made of iron.