Presentation Information
[20p-P07-26]Improved Cycle Stability of Lithium Ion Battery Using Size Controlled Silicon Nanoporous Particle Anodes
〇Takamichi Tachibana1, Keisuke Sato1, Naoki Fukata2 (1.Tokyo Denki Univ., 2.National Institute for Materials Science)
Keywords:
lithium-ion battery
Si materials are being considered as anode active materials for lithium-ion batteries. Graphite is currently used as the mainstream negative-electrode active material, but replacing it with Si nanoparticles can extend the specific capacity by more than 10 times and provide a low operating potential. However, the occurrence of large volume expansion due to the incorporation of lithium ions into Si causes a decrease in cycle performance. In this study, the volume expansion was suppressed by homogenizing the particle size of Si nanoparticles and forming pores inside.