| 초록 |
Silicon based Li-ion battery anodes have recently received attention, since they offer specific capacity an order of magnitude beyond that of carbon (372 mAhg-1). However, the cycling performance of pure silicon anode is poor, its severe volume expansion and shrinkage during the insertion and extraction of Li-ions, which results in pulverization of Si particles and eventual loss of Li-ion storage ability. In this study, we used silsesquiazane (SSQZ) as a precursor to silicon based anode materials. After pyrolysis, SSQZ forms silicon based inorganic materials with controlled carbon content, which showed improved Li-ion capacity than graphite based anode materials. Moreover, since SSQZ is soluble in many organic solvents, it could be form complex with grapheme in much smaller domain scale than simple mixing. The prepared hybrid materials are expected to show improved performance as anodes for Li-ion batteries. |
