法拉第效率
材料科学
阳极
过电位
硅
锂(药物)
成核
化学气相沉积
纳米材料
化学工程
基质(水族馆)
纳米技术
枝晶(数学)
光电子学
电化学
电极
化学
有机化学
物理化学
医学
海洋学
几何学
工程类
数学
地质学
内分泌学
作者
Shangze Fan,Shiqiang Cui,Jiangjiang Zhang,Jiepeng Rong,Wenxin Wang,Xuteng Xing,Yaran Liu,Wenwen Ma,Jing‐Tai Zhao
出处
期刊:Small
[Wiley]
日期:2023-07-31
卷期号:19 (48)
被引量:5
标识
DOI:10.1002/smll.202304290
摘要
Developing stable silicon-based and lithium metal anodes still faces many challenges. Designing new highly practical silicon-based anodes with low-volume expansion and high electrical conductivity, and inhibiting lithium dendrite growth are avenues for developing silicon-based and lithium metal anodes, respectively. In this study, SiOx Cy microtubes are synthesized using a chemical vapor deposition method. As Li-ion battery anodes, the as-prepared SiOx Cy not only combines the advantages of nanomaterials and the practical properties of micromaterials, but also exhibits high initial Coulombic efficiency (80.3%), low volume fluctuations (20.4%), and high cyclability (98% capacity retention after 1000 cycles). Furthermore, SiOx Cy , as a lithium deposition substrate, can effectively promote the uniform deposition of metallic lithium. As a result, low nucleation overpotential (only 6.0 mV) and high Coulombic efficiency (≈98.9% after 650 cycles, 1.0 mA cm-2 and 1.0 mAh cm-2 ) are obtained on half cells, as well as small voltage hysteresis (only 9.5 mV, at 1.0 mA cm-2 ) on symmetric cells based on SiOx Cy . Full batteries based on both SiOx Cy and SiOx Cy @Li anodes demonstrate great practicality. This work provides a new perspective for the simultaneous development of practical SiOx Cy and dendrite-free lithium metal anodes.
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