SEA WATER SECONDARY BATTERY AND SEA WATER SECONDARY BATTERY SYSTEM

摘要

The present invention relates to a secondary battery and a secondary battery system. The secondary battery includes: a positive electrode part which includes a solution including sodium and a positive current collector immersed in the solution including sodium; a negative electrode part which includes a liquid organic electrolyte, a negative current collector immersed in the liquid organic electrolyte, and a negative electrode active material layer located on the surface of the negative current collector; and a solid electrolyte located between the positive electrode part and the negative electrode part.