摘要
Polycrystalline samples of isostructural MSbb>2b>Ob>4b> (M = Co, Ni) have been prepared by solid state synthesis and lithium-storage is investigated as possible anode materials for lithium-ion batteries. The reaction mechanism of lithium with MSbb>2b>Ob>4b> (M = Co, Ni) is explored by galvanostatic cycling, cyclic voltammogram and ex situ studies. Both CoSbb>2b>Ob>4b> and NiSbb>2b>Ob>4b> exhibit similar electrochemical behavior and show reversible capacity of 490 and 412 mAh g鈭? respectively in the first cycle. Reversible alloying de-alloying of Lib>xb>Sb takes place in an amorphous matrix of M (Co, Ni) and Lib>2b>O during electrochemical cycling.