Investigation of the Irreversible Reaction Mechanism on SiO Anode Material for Li-Ion Batteries

SiO anode material has expected as substitute Graphite because it has high capacity and long calendar life. SiO consists of nano-sized Si which is active material against Li and an amorphous SiOx which is the buffer of volume change of Si during Li-insertion and Li-extraction process . However, the charge-discharge efficiency at first cycle is lower than Graphite and it shows only 7075 %. The reaction mechanism on SiO has been investigated by many institutions to improve the reversibility. It though that the reaction mechanism of SiO can be summarized as follows :