Superior Electrochemical Performance of a Ni–P/Si Negative Electrode for Li-ion Batteries in an Ionic Liquid Electrolyte

To achieve electrode performance with both high capacity and long cycle life, we investigated the effect of the anion structure in an ionic liquid electrolyte on the electrochemical performance of an annealed Ni–P/(etched Si) negative electrode for Li-ion batteries. The electrode maintained a discha...

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Bibliographic Details
Published in:Chemistry letters 2018-11, Vol.47 (11), p.1416-1419
Main Authors: Yamaguchi, Kazuki, Domi, Yasuhiro, Usui, Hiroyuki, Ueno, Ayumu, Komura, Takuro, Nokami, Toshiki, Itoh, Toshiyuki, Sakaguchi, Hiroki
Format: Article
Language:English
Subjects:
Electrochemical analysis
Electrodes
Electrolytes
Ionic liquids
Ions
Lithium-ion batteries
Rechargeable batteries
Silicon
Solvents
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Summary:To achieve electrode performance with both high capacity and long cycle life, we investigated the effect of the anion structure in an ionic liquid electrolyte on the electrochemical performance of an annealed Ni–P/(etched Si) negative electrode for Li-ion batteries. The electrode maintained a discharge capacity of 1890 mA h g−1 after 250 cycles in bis(fluorosulfonyl)amide-based ionic liquid electrolyte, which was approximately three times higher than that in bis(trifluoromethanesulfonyl)amide-based electrolyte.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.180649