Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6613306 | Electrochimica Acta | 2014 | 38 Pages |
Abstract
Thin films of Sn-Cu alloys with various compositions were prepared by annealing tin-coated copper foils at 463Â K for 0-45Â h. Their charge-discharge behaviors as negative electrodes for sodium secondary batteries were investigated using an inorganic ionic liquid electrolyte, i.e., NaFSA-KFSA (FSAÂ =Â bis(fluorosulfonyl)amide), at 363Â K. A Sn-Cu film annealed for 4Â h exhibited a stable reversible capacity of approximately 100 mAh (g-Sn)â1. The improvement in the cyclability is discussed based on X-ray diffraction, X-ray photoelectron spectroscopy, and field-emission scanning electron microscopy results.
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Authors
Takayuki Yamamoto, Toshiyuki Nohira, Rika Hagiwara, Atsushi Fukunaga, Shoichiro Sakai, Koji Nitta, Shinji Inazawa,