电化学（中英文）2025，Vol.31Issue(2)：28-34,7.DOI:10.61558/2993-074X.3520
高体积比容量二氧化锡颗粒嵌入碳包覆介孔氧化亚硅棒锂离子电池负极研究
SnO2 Particles Embedded into Carbon Coated Mesoporous SiOx Rod as High Volumetric Capacity Anode for Lithium-Ion Batteries
郭家林 1李妮妮 2郑鹏2
作者信息
- 1. 商洛学院,陕西 商洛 726000
- 2. 陕西科技大学,陕西 西安 710021
- 折叠
摘要
Abstract
Due to the high capacity and moderate volume expansion of silicon protoxide SiOx(160%)compared with that of Si(300%),reducing silicon dioxide SiO2 into SiOx while maintaining its special nano-morphology makes it attractive as an anode of Li-ion batteries.Herein,through a one-pot facile high-temperature annealing route,using SBA15 as the silicon source,and embedding tin dioxide SnO2 particles into carbon coated SiOx,the mesoporous SiOx-SnO2@C rod composite was prepared and tested as the anode material.The results revealed that the SnO2 particles were distributed uniformly in the wall,which could further improve their volume energy densities.The coated carbon plays a role in maintaining structural integrality during lithiation,and the rich mesopores structure can release the expanded volume and enhance Li-ion transfer.At 0.1 A·g-1,the gravimetric and volumetric capacities of the composite were as high as 1271 mAh·g-1 and 1573 mAh·cm-3,respectively.After 200 cycles,the 95%capacity could be retained compared with that upon the 2nd cycle at 0.5 A·g-1.And the rod morphology was well kept,except that the diameter of the rod was 3 times larger than its original size after the cell was discharged into 0.01 V.关键词
碳包覆/介孔SiOx/负极/锂离子电池Key words
Carbon coating/Mesoporous SiOx/Anode/Li-ion battery引用本文复制引用
郭家林,李妮妮,郑鹏..高体积比容量二氧化锡颗粒嵌入碳包覆介孔氧化亚硅棒锂离子电池负极研究[J].电化学（中英文）,2025,31(2):28-34,7.
