材料科学
阳极
纳米颗粒
锂(药物)
复合数
化学工程
电化学
电导率
石墨烯
锂离子电池
热扩散率
离子
复合材料
电池(电)
纳米技术
电极
化学
工程类
物理
内分泌学
物理化学
医学
功率(物理)
有机化学
量子力学
作者
Hanyin Zhang,Renzong Hu,Sirui Feng,Zhiqun Lin,Min Zhu
出处
期刊:eScience
[Elsevier]
日期:2023-02-01
卷期号:3 (1): 100080-100080
被引量:22
标识
DOI:10.1016/j.esci.2022.10.006
摘要
SiO-based materials represent a promising class of anodes for lithium-ion batteries (LIBs), with a high theoretical capacity and appropriate and safe Li-insertion potential. However, SiO experiences a large volume change during the electrochemical reaction, low Li diffusivity, and low electron conductivity, resulting in degradation and low rate capability for LIBs. Here, we report on the rapid crafting of SiO–Sn2[email protected] composites via a one-step plasma milling process, leading to an alloy of Sn and Fe and in turn refining SiO and Sn2Fe into nanoparticles that are well dispersed in a nanosized, few-layer graphene matrix. The Sn and Fe nanoparticles generated during the first Li-insertion process form a stable network to improve Li diffusivity and electron conductivity. As an anode material, the SiO–Sn2[email protected] composite manifests high reversible capacities, superior cycling stability, and excellent rate capability. The capacity retention is found to be as high as 95% and 84% at the 100th and 300th cycles under 0.3 C. During rate capability testing at 3, 6, and 11 C, the capacity retentions are 71%, 60%, and 50%, respectively. This study highlights that this simple, one-step plasma milling strategy can further improve SiO-based anode materials for high-performance LIBs.
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