%0 Journal Article
%K Lithium batteries
%K Anode materials
%K Magnesium silicide
%K Mg2Si
%A Gregory A Roberts
%A Elton J Cairns
%A Jeffrey A Reimer
%B Journal of Power Sources
%D 2002
%N 2
%P 424-429
%R 10.1016/S0378-7753(02)00207-0
%T Magnesium silicide as a negative electrode material for lithium-ion batteries
%V 110
%8 08/2002
%! Journal of Power Sources
%X <p>Mg<sub>2</sub>Si was synthesized by mechanically activated annealing and evaluated as a negative electrode material. A maximum discharge capacity of 830&nbsp;mAh/g was observed by cycling over a wide voltage window of 5–650&nbsp;mV versus Li, but capacity fade was rapid. Cycling over the range 50–225&nbsp;mV versus Li produced a stable discharge capacity of approximately 100&nbsp;mAh/g. X-ray diffraction (XRD) experiments showed that lithium insertion converts Mg<sub>2</sub>Si into Li<sub>2</sub>MgSi after lithium intercalation into Mg<sub>2</sub>Si. Electrochemical evidence of Li–Si reactions indicated that the Li<sub>2</sub>MgSi structure can be converted to binary lithium alloys with extensive charging.</p>