SODIUM-SULFUR SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To reduce the cost of a sodium - sulfur secondary battery by making a positive electrode collector inexpensive. SOLUTION: In this sodium - sulfur secondary battery, a negative electrode compartment 4 to store sodium forming a negative electrode active material and a positive electrode compartment 3 to store sulfur or sodium polysulfide forming a positive electrode active material are partitioned by an electric insulating electrolyte 1 passing a sodium ion, and a positive electrode collector 10 to carry out current collecting is disposed in the positive electrode compartment. The positive electrode collector 10 is formed of conductive fibers having a curled shape or conductive fibers entangled irregularly.