Patent ID: 9300012
Filing Date: 2016-03-29
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A solid electrolyte secondary battery comprising a positive electrode chamber where sulfur as a positive electrode active material is housed at least, a negative electrode chamber where sodium as a negative electrode active material is housed at least, a wall, which is located between said positive electrode chamber and said negative electrode chamber, which isolates said sulfur and said sodium, and which is made of a solid electrolyte having conductivity for said sodium, a positive electrode active material storage container which is independent from said positive electrode chamber and housing a part of said sulfur, and a passage which circulates in one direction to move said sulfur from said positive electrode chamber to said positive electrode active material storage container and further circulates from said positive electrode active material storage container to said positive electrode chamber, wherein, when charging, moving of said sulfur from said positive electrode active material storage container to said positive electrode chamber is promoted by decreasing pressure in said positive electrode chamber because said sodium, which is ionized, transmits through said wall and moves to said negative electrode chamber from said positive electrode chamber, and wherein, when discharging, the moving of said sulfur from said positive electrode chamber to said positive electrode active material storage container is promoted by increasing the pressure in said positive electrode chamber because said sodium, which is ionized, transmits through said wall and moves to said positive electrode chamber from said negative electrode chamber.