Abstract
Lithium-ion battery (LIB) has been used in various mobile devices. From now on, it is expected that LIBs become widely used as APU (Auxiliary Power Unit) for cars and airplanes. Thus, LIBs would require more high lithium storage capacity in future. In this paper, SnO2 with large theoretical capacity was explained. This active material has a problem of poor cyclability. In general, the volume change is moderated by utilizing smaller and more uniform particles for active materials. SnO2 nanoparticles by microwave heating is ultrafine. The sizes of primary particles were estimated to be around 5 nm by transmission electron microscopy and X-ray diffraction. The SnO2 nanoparticles worked as a rechargeable electrode material, and the initial capacity (cut-off voltage: 0.01 V) was 1670 mAh/g. Cyclic voltammetry, X-ray diffraction, and micro-Raman studies elucidated that lithium insertion-deinsertion reaction on the 1st cycle was caused by both redox and alloying-dealloying reactions of Sn, whereas the redox ability of the SnO2 nanoparticles was gradually lost during charge-discharge repetition.
https://ror.org/01p7qe739 
