材料科学
空隙(复合材料)
电解质
纳米颗粒
化学工程
电化学
碳纤维
原位
基质(化学分析)
电流密度
纳米技术
复合材料
电极
化学
有机化学
复合数
物理
工程类
物理化学
量子力学
作者
Xiaoyan Wang,Ya‐Jun Cheng,Suzhe Liang,Qing Ji,Jin Zhu,Yonggao Xia
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-01-27
卷期号:38 (5): 1689-1697
被引量:3
标识
DOI:10.1021/acs.langmuir.1c02726
摘要
Ultrafine SnO2/Sn nanoparticles encapsulated into an adjustable meso-/macroporous carbon matrix have been successfully fabricated by the in situ SiOx sacrificial strategy. The control over the void space in the carbon matrix effectively improves the accessibility of the SnO2/Sn toward an electrolyte solution. More importantly, the void space also provides an efficient means to accommodate the mechanical stress caused by the volume change of the SnO2/Sn over cycles. As a result, the enhanced electrolyte accessibility and suppressed mechanical stress improve the electrochemical performance regarding reversible capacity, cyclic stability, and rate capability. A reversible capacity of 1105 mAh g-1 is still retained after 290 cycles at 200 mAg-1, and the capacity still can keep at 107 mAh g-1 at a high current density of 10 A g-1.
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