Electrochemical properties of novel calcium stannate anode for lithiumion batteries

CaSnO3 with the perovskite structure was prepared by wet-chemical route and the electrochemical properties as anode material for lithium ion batteries were studied. The results show that the uniform nano-crystallites （about 200nm） of CaSnO3 are obtained and a reversible capacity of 460mA·h·g-1 （01.0V, 0.1C） with good cycling stability is delivered （the capacity loss per cycle is only 0.09%）.The observed capacity involved in the first discharge and the reversible capacity during subsequent charge-discharge cycles shows that the electrochemical process in CaSnO3 is similar to other Sn-based oxide materials, namely, an initial structural reduction with Sn-metal formation followed by reversible Li-Sn alloy formation. Both the attainable capacity and its retention on （charge-）（discharge） cycling are better than the previously reported best-performing bulk Sn-oxide or ATCO materials, which indicates that the perovskite structure and Ca-ion may play a beneficial role.