LITHIUM-SULFUR SECONDARY BATTERY
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United States of America Patent
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Sep 29, 2016
app pub date -
Oct 15, 2014
filing date -
Dec 3, 2013
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Abstract
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.
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