Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact

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	Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact
	Xia, Senlin; Yin, Shanshan; Zhao, Dong; Ji, Qing; Xia, Yonggao; Fang, Kai; Liang, Suzhe; Zheng, Luyao; Qiu, Bao; Yang, Zhaohui
刊名	ACS NANO
	2018
卷号	12 期号:1 页码:861-875
关键词	Lithium-ion Batteries Performance Anode Materials Facile Scalable Synthesis Excellent Electrochemical Performance Silicon/carbon Composite Secondary Batteries Lithiated Silicon Ag Nanoparticles Rate Capability Energy-storage
英文摘要	Silicon (Si) has been regarded as one of the most promising anodes for next-generation lithium-ion batteries (LIBs) due to its exceptional capacity, appropriate voltage profile, and reliable operation safety. However, poor cyclic stability and moderate rate performance have been critical drawbacks to hamper the practical application of Si-based anodes. It has been one of the central issues to develop new strategies to improve the cyclic and rate performance of the Si-based lithium-ion battery anodes. In this work, super-small metal nanoparticles (2.9 nm in diameter) are in situ synthesized and homogeneously embedded in the in situ formed nitrogen-doped carbon matrix, as demonstrated by the Si/Ag/C nanohybrid, where epoxy resin monomers are used as solvent and carbon source. With tiny amount of silver (2.59% by mass), the Si/Ag/C nanohybrid exhibits superior rate performance compared to the bare Si/C sample. Systematic structure characterization and electrochemical performance tests of the Si/Ag/C nanohybrids have been performed. The mechanism for the enhanced rate performance is investigated and elaborated. The temperature-dependent I-V behavior of the Si/Ag/C nanohybrids with tuned silver contents is measured. Based on the model, it is found that the super-small silver nanoparticles mainly increase charge carrier mobility instead of the charge carrier density in the Si/Ag/C nanohybrids. The evaluation of the total electron transportation length provided by the silver nanoparticles within the electrode also suggests significantly enhanced charge carrier mobility. The existence of tremendous amounts of super-small silver nanoparticles with excellent mechanical properties also contributes to the slightly improved cyclic stability compared to that of simple Si/C anodes.
学科主题	Polymer Science
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16925]
专题	2018专题
推荐引用方式 GB/T 7714	Xia, Senlin,Yin, Shanshan,Zhao, Dong,et al. Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact[J]. ACS NANO,2018,12(1):861-875.
APA	Xia, Senlin.,Yin, Shanshan.,Zhao, Dong.,Ji, Qing.,Xia, Yonggao.,...&Xie, Shuang.(2018).Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact.ACS NANO,12(1),861-875.
MLA	Xia, Senlin,et al."Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact".ACS NANO 12.1(2018):861-875.