锡
无定形固体
材料科学
硅酸钠
氧化锡
钠
氧化钠
化学工程
阳极
氧化物
氢
无机化学
冶金
化学
物理化学
有机化学
工程类
电极
作者
Fumitaka Sato,Tsuyoshi Honma,Takayuki Komatsu,Kenji Shinozaki,Toshiaki Ina,Hideo Yamauchi
标识
DOI:10.1016/j.jpcs.2021.110377
摘要
Phase separation of amorphized sodium tin silicate and the reduction of tin oxide by heat treatment in hydrogen were characterized. An amorphous powder was prepared by planetary ball milling of a mixture of SnO and sodium disilicate glass (Na2O–2SiO2). xSnO-(100-x)/3Na2O-2 (100-x)/3SiO2 system with x composition less than 55 was confirmed to be amorphous. The amorphous powder was heat-treated in H2/N2 mixture gas and SnO nanocrystals and SnO2 nanocrystals were formed at temperatures up to 360 °C. The reduction of tin oxide to metallic Sn started above 450 °C, and the percentage of metal tin precipitated increased as the heat treatment time increase. We conducted a charge-discharge test in a sodium cell using composite ceramics and succeeded in reducing the irreversible capacity that occurs on the first charge. Sodium tin silicate is a promising anode active material for oxide all-solid-state sodium-ion batteries.
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