Electrochemical lithium quasi-intercalation with arsenic

To investigate the electrochemical reaction mechanism of As, which shows poor electrochemical reversibility with Li, an As/C nanocomposite was prepared using a straightforward high-energy mechanical milling technique. The electrochemical reaction mechanism of the As/C nanocomposite electrode with Li was elucidated by ex situ XRD and HRTEM analyses in combination with differential capacity plot analysis. Electrochemical tests showed that the As/C nanocomposite exhibited good reversibility between the LiAs (0.85 V) and As (2 V) phases showing quasi-intercalation reaction.