Abstract
SnSe2 and SnSe nanocrystals were prepared using a simple solvothermal method by changing the molar ratio of SnCl[Formula: see text]2H2O and Se powder. When SnSe2 and SnSe are acted as lithium ion battery anodes, the SnSe hybrid structure shows more excellent electrochemical performance than that of SnSe2 interconnected nanosheet. It delivers a reversible capacity of 1023[Formula: see text]mAh[Formula: see text]g[Formula: see text] at a current density of 200[Formula: see text]mA[Formula: see text]g[Formula: see text], and maintaining a capacity of 498[Formula: see text]mAh[Formula: see text]g[Formula: see text] till 120 cycles. According to many present works, SnSe2 with interconnected thin nanosheet should possess more superior property than hybrid structured SnSe due to short charge transfer paths. However, in our research, the result is the opposite. Therefore, we consider that the superior electrochemical performance of SnSe is attributed to its highly reversible conversion reaction mechanism than SnSe2.
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