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Research articles

ScienceAsia 49 (2023):ID 706-709 |doi: 10.2306/scienceasia1513-1874.2023.064


Enhanced cycle-capacity of micron scale silicon anode materials for lithium-ion batteries using embedded nanoparticles


Zhiheng Wanga,†, Fengxiang Guob,†, Xiaoli Hua, Jinqi Wanga, Wei Wanga,*, Caiyun Genga, Guangyuan Xub, Yao Wanga, Laurence A. Belfiorec, Jianguo Tanga,*

 
ABSTRACT:     Micron scale Silicon (Si) powders embedded with nanoparticles were fabricated by dealloying methods and extracted from antimony (Sb)-inoculated Aluminum-10 wt.% Silicon (Al-10Si) alloys. From TEM observation, most of these nanoparticles were not connected with adjacent ones, with radii ranging from 3 to 10 nm. The cycling performance of Si powders with nanoparticles delivered a specific capacity of 105.2 mAh/g after 30 cycles at a current density of 0.05 mA/g, which was 40% higher than those without nanoparticles, due to the formation of preferential channels for electrolytes. Therefore, the micron size Si structures with nanoparticles have shown a potential as highperformance anode materials for lithium-ion batteries.

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a Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071 China
b Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology, Qingdao 266001 China
c Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523 USA

* Corresponding author, E-mail: wangwei040901@163.com, tang@qdu.edu.cn

Received 29 Dec 2021, Accepted 8 Jun 2023