[14p-P07-1~61] 1 Interdisciplinary Physics and Related Areas of Science and Technology (Poster)

[14p-P07-48] Cycle Life Improvement of Lithium-Ion Batteries Using Phosphorus-Doped Silicon Nanoparticle Anode

〇(M1)Hidetaka Nomura¹, Keisuke Sato¹ (1.Tokyo Denki Univ.)

Keywords:

lithium-ion secondary batteries,phosphorus-doped,silicon particles

In recent years, silicon has been considered as a negative-electrode active material for lithium-ion batteries. By using silicon particles with small particle size, the internal stress difference generated during charging and discharging could be suppressed, resulting in a longer service life, but this led to a decrease in initial capacity. Adding phosphorus as an impurity to the particles improved conductivity and initial capacity, but reduced battery life. In this study, we investigated the conditions for adding phosphorus to improve the capacity and charge-discharge cycle life.