Abstract
Zn 3P 2 has been studied as an anode material for lithium-ion batteries. Electrochemical studies demonstrate that the initial discharge and charge capacities are 1056 and 710 mAh g −1, respectively. The discharge–charge reaction mechanism of lithium with Zn 3P 2 is analyzed by ex situ X-ray diffraction. On initial discharge, LiZn alloy is formed in a matrix of Li 3P. Upon charge, LiZn alloy is transformed completely into Zn metal and Li 3P is converted partially to P, which reacts with Zn to form the original Zn 3P 2 phase. The reversible capacity of Zn 3P 2 is improved when cycled in the limited voltage window.
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