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Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact
Yin, Shanshan; Zhao, Dong; Ji, Qing; Xia, Yonggao; Xia, Senlin; Wang, Xinming; Wang, Meimei; Ban, Jianzhen; Zhang, Yi; Metwalli, Ezzeldin; Wang, Xiaoyan; Xiao, Ying; Zuo, Xiuxia; Xie, Shuang; Fang, Kai; Liang, Suzhe; Zheng, Luyao; Qiu, Bao; Yang, Zhaohui; Lin, Yichao; Chen, Liang; Wang, Cundong; Liu, Zhaoping; Zhu, Jin; Mueller-Buschbaum, Peter; Cheng, Ya-Jun
2018
发表期刊ACS NANO
卷号12期号:1页码:861-875
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.
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
学科领域Polymer Science
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/16925
专题2018专题
推荐引用方式
GB/T 7714
Yin, Shanshan,Zhao, Dong,Ji, Qing,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 Yin, Shanshan.,Zhao, Dong.,Ji, Qing.,Xia, Yonggao.,Xia, Senlin.,...&Cheng, Ya-Jun.(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 Yin, Shanshan,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.
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