LITHIUM-SULFUR SECONDARY BATTERY

摘要

Provided is a lithium-sulfur secondary battery capable of suppressing diffusion of a polysulfide eluted into an electrolyte, into a negative electrode and capable of suppressing lowering of a charge-discharge efficiency. In a lithium-sulfur secondary battery (B) of the invention, having a positive electrode (P) including a positive electrode active material containing sulfur, a negative electrode (N) including a negative electrode active material containing lithium, and a separator (5) which is disposed between the positive electrode and the negative electrode and which allows a lithium ion of an electrolyte (L) to pass therethrough, a cation-exchange membrane (CE) is formed on one of a positive electrode-side surface of the separator and a negative electrode-side surface thereof.

主权项

1. A lithium-sulfur secondary battery comprising:
a positive electrode including a positive electrode active material containing sulfur; a negative electrode including a negative electrode active material containing lithium; and a separator which is disposed between the positive electrode and the negative electrode and which allows a lithium ion of an electrolyte to pass therethrough, characterized in that a cation-exchange membrane is formed on at least one of a positive electrode-side surface of the separator and a negative electrode-side surface of the separator.