@article{oai:repository.lib.tottori-u.ac.jp:00007288, author = {道見, 康弘 and Domi, Yasuhiro and 薄井, 洋行 and Usui, Hiroyuki and 野上, 敏材 and Nokami, Toshiki and 伊藤, 敏幸 and Itoh, Toshiyuki and 坂口, 裕樹 and Sakaguchi, Hiroki and Ueno, Ayumu and Shindo, Yoshiko and Mizuguchi, Hayato and Komura, Takuro}, issue = {4}, journal = {JOURNAL OF THE ELECTROCHEMICAL SOCIETY, JOURNAL OF THE ELECTROCHEMICAL SOCIETY}, month = {Feb}, note = {Annealed Ni–P–coated Si (Ni–P/Si) anodes for lithium-ion batteries have shown a superior cycle life with discharge capacity of 1000 mA h g−1 over 1100 cycles in some ionic-liquid electrolytes. However, the annealing temperature has yet to be optimized for Ni–P/Si electrodes. We investigated the electrochemical performance of Ni–P/Si electrode annealed at various temperatures in this study. The Ni–P/Si electrodes annealed at 800 ± 20 °C exhibited a superior cycle life with a reversible capacity of 1000 mA h g−1 over 1000 cycles, whereas the capacity of the electrodes annealed at temperatures of 750 °C and 850 °C faded at approximately 500 cycles. At 800 °C, a newly formed NiSi2 phase was theorized to significantly contribute to improving adhesion between the Ni–P coating layer and the Si particles. The Ni–P coating particles tended to aggregate at 850 °C, leading to a reduction in the coating effect, that is, a decline in their reactivity with Li+, acceleration of electrode disintegration, and a reduction in electrical conductivity. On the other hand, Ni–P/Si electrodes annealed at 850 °C exhibited a superior rate performance. The amount of available NiSi2 which ultimately contributed to higher reactivity with Li should increase.}, title = {Effect of Annealing Temperature of Ni-P/Si on its Lithiation and Delithiation Properties}, volume = {167}, year = {2020}, yomi = {ドウミ, ヤスヒロ and ウスイ, ヒロユキ and ノカミ, トシキ and イトウ, トシユキ and サカグチ, ヒロキ} }