Silicon@carbon hollow core–shell heterostructures novel anode materials for lithium ion batteries
Silicon@carbon hollow core–shell heterostructures novel anode materials for lithium ion batteries
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DOI：
10.1016/j.electacta.2012.10.008
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发表时间：
2013
影响因子：
6.6
通讯作者：
Xiangyang Zhou;Jingjing Tang;Juan-Yu Yang;Jing Xie;Lulu Ma
中科院分区：
文献类型：
--
作者：
Xiangyang Zhou;Jingjing Tang;Juan-Yu Yang;Jing Xie;Lulu Ma
硅是锂离子电池负极材料的有前途的候选材料，因为它具有高达 4200mAhg−1 的超高理论容量，大约是目前商用石墨负极的十倍。然而，循环过程中体积剧烈变化导致的粉化和容量衰减仍然挑战着其广泛应用。为了解决这些问题，通过灵活可调的路线合成了一种新型 Si@C 异质结构，该异质结构在硅核和碳壳之间具有可调的预制空隙。当评估其电化学性能时，这些空心 Si@C 球表现出增强的电化学性能。
Silicon is a promising candidate for the anode material in lithium ion batteries due to its ultrahigh theoretical capacity of 4200mAhg−1, which is approximately ten times larger compared to current commercial graphite anodes. However, the pulverization and capacity fading caused by the dramatic volume changes during cycling are still challenging its widespread application. To address these problems, a novel Si@C heterostructure with tunable preformed voids between Si core and carbon shell is synthesized via a flexible and tunable route. When evaluated for their electrochemical properties, these hollow Si@C spheres show enhanced electrochemical properties.