@article{oai:repository.lib.tottori-u.ac.jp:00007175, author = {道見, 康弘 and Domi, Yasuhiro and 薄井, 洋行 and Usui, Hiroyuki and 坂口, 裕樹 and Sakaguchi, Hiroki and Shindo, Yoshiko and Yodoya, Shuhei and Sato, Hironori and Nishikawa, Kei}, issue = {6}, journal = {ELECTROCHEMISTRY, ELECTROCHEMISTRY}, month = {}, note = {We investigated the applicability of ionic-liquid electrolytes to FeSi2/Si composite electrode for lithium-ion batteries. In conventional organic-liquid electrolytes, a discharge capacity of the electrode rapidly faded. In contrast, the electrode exhibited a superior cycle life with a reversible capacity of 1000 mA h g(Si)−1 over 850 cycles in a certain ionic-liquid electrolyte. The difference in the cycle life was explained by surface film properties. In addition, the rate performance of the FeSi2/Si electrode improved in another ionic-liquid electrolyte. Remarkably, lithiation of only Si in FeSi2/Si composite electrode occurred whereas each FeSi2- and Si-alone electrode alloyed with Li in the ionic-liquid electrolyte. FeSi2 certainly covered the shortcomings of Si and the FeSi2/Si composite electrode exhibited improved cycle life and rate capability compared to Si-alone electrode.}, pages = {548--554}, title = {Electrochemical Lithiation and Delithiation Properties of FeSi2/Si Composite Electrodes in Ionic-Liquid Electrolytes}, volume = {88}, year = {2020}, yomi = {ドウミ, ヤスヒロ and ウスイ, ヒロユキ and サカグチ, ヒロキ} }