Silicon Nanotube Battery Anodes

作者：Mi‐Hee Park, Min Gyu Kim, Jaebum Joo, Kitae Kim, Je Young Kim, S. T. Ahn, Yi Cui, Jaephil Cho · 发表于：Nano Letters · 年份：2009 · DOI：10.1021/nl902058c · 被引用次数：1492 · 研究领域：Advancements in Battery Materials、Graphene research and applications、Semiconductor materials and devices

We present Si nanotubes prepared by reductive decomposition of a silicon precursor in an alumina template and etching. These nanotubes show impressive results, which shows very high reversible charge capacity of 3247 mA h/g with Coulombic efficiency of 89%, and also demonstrate superior capacity retention even at 5C rate (=15 A/g). Furthermore, the capacity in a Li-ion full cell consisting of a cathode of LiCoO2 and anode of Si nanotubes demonstrates a 10 times higher capacity than commercially available graphite even after 200 cycles.