材料科学
纳米线
溅射
阳极
无定形固体
复合数
纳米颗粒
纳米技术
制作
基质(水族馆)
化学工程
光电子学
复合材料
薄膜
结晶学
化学
电极
替代医学
海洋学
物理化学
病理
地质学
工程类
医学
作者
Giichiro Uchida,K. Masumoto,Masanori Sakakibara,Yumiko Ikebe,Shinjiro Ono,Kazunori Koga,Takahiro Kozawa
标识
DOI:10.1038/s41598-023-41452-3
摘要
To realize high-capacity Si anodes for next-generation Li-ion batteries, Si/Sn nanowires were fabricated in a single-step procedure using He plasma sputtering at a high pressure of 100-500 mTorr without substrate heating. The Si/Sn nanowires consisted of an amorphous Si core and a crystalline Sn shell. Si/Sn composite nanowire films formed a spider-web-like network structure, a rod-like structure, or an aggregated structure of nanowires and nanoparticles depending on the conditions used in the plasma process. Anodes prepared with Si/Sn nanowire films with the spider-web-like network structure and the aggregated structure of nanowires and nanoparticles showed a high Li-storage capacity of 1219 and 977 mAh/g, respectively, for the initial 54 cycles at a C-rate of 0.01, and a capacity of 644 and 580 mAh/g, respectively, after 135 cycles at a C-rate of 0.1. The developed plasma sputtering process enabled us to form a binder-free high-capacity Si/Sn-nanowire anode via a simple single-step procedure.
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