摘要 |
A sodium sulfur cell comprises a cathode active material (5) of metallic sodium, and anode active material (3) of sulfur or sodium polysulfide, and a beta alumina solid electrolyte separator (1). At least one of the above active materials containing, as an impurity, calcium of at most 20 ppm and/or potassium of at most 200 ppm, by weight. The cell of the invention has excellent characteristics, particularly a prolonged electromotive life. |
申请人 |
NGK INSULATORS, LTD., NAGOYA, AICHI, JP;THE TOKYO ELECTRIC POWER CO., INC., TOKIO/TOKYO, JP |
发明人 |
OHSHIMA, MASAAKI, C/O TOKYO ELECTRIC POWER CO.INC., CHIYODA-KU, TOKYO, JP;YOSHIDA, AKIHIKO, IWAKURA CITY, AICHI PREF., JP;KOBAYASHI, AKIRA, C/O TOKYO ELECTRIC POWER CO.INC., CHIYODA-KU, TOKYO, JP |