Author/Authors :
T.B. Kim، نويسنده , , J.W. Choi، نويسنده , , H.S. Ryu، نويسنده , , G.B. Cho، نويسنده , , K.W. Kim، نويسنده , , J.H. Ahn، نويسنده , , K.K. Cho، نويسنده , , H.J. Ahn، نويسنده ,
Abstract :
We investigated sodium/pyrite battery because sodium and pyrite (natural FeS2 ore) were very cheap materials. The sodium/pyrite battery showed high discharge capacity of 630 mAh g−1-FeS2 with 50 mA g−1-FeS2 at room temperature, which was higher than that of Li ion battery and Na/synthetic FeS2 battery. First discharge curve had one plateau-shaped voltage region of 1.3 V, which disappeared and changed to sloping shape after second cycle. The discharge capacity decreased continuously by repeated charge–discharge cycling, and remained 85 mAh g−1-FeS2 after 50th cycles.
