The 67th JSAP Spring Meeting 2020

Presentation information

Poster presentation

9 Applied Materials Science » 9.2 Nanoparticles, Nanowires and Nanosheets

[14a-PA2-1~18] 9.2 Nanoparticles, Nanowires and Nanosheets

Sat. Mar 14, 2020 9:30 AM - 11:30 AM PA2 (PA)

9:30 AM - 11:30 AM

[14a-PA2-1] Formation of Fe nanoparticles after discharge for the FeF3 cathode

Tsuyoshi Takami1, Keitaro Matsui2, Masahiro Shikano2, Hikari Sakaebe2, Toshiharu Fukunaga1 (1.Kyoto Univ., 2.AIST)

Keywords:battery, nanoparticles, cathode

Fluoride cathode materials that undergo conversion reactions such as FeF3 have attracted increasing interest owing to their high energy density. However, the ability of FeF3 to maintain a high capacity over repeated cycles and the decisive factor dominating conversion reactions have yet to be elucidated. By optimizing the choice of lithium salts and electrolyte solutions, we were able to achieve good capacity retention for an FeF3-based cathode, that is, 4.5-fold enhancement compared with a model electrode (372 mAh/g after 30 cycles). Fe particle size after discharge plays a crucial role for realizing higher capacities.