Green synthesis of high-performance porous carbon coated silicon composite anode for lithium storage based on recycled silicon kerf waste

被引：0

作者：

Shi, Jian ^{[1
]}

Sheng, Liangquan ^{[1
]}

Li, Jingwei ^{[2
,3
,4
]}

Liu, Guicheng ^{[5
]}

机构：

[1] School of Chemistry and Materials Engineering & Engineering Research Center of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang Normal University, Fuyang,236037, China

[2] State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing,100160, China

[3] School of Materials Science and Engineering, Hefei University of Technology, Hefei,230009, China

[4] Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei,230009, China

[5] Department of Physics, Dongguk University, Seoul,04620, Korea, Republic of

来源：

Journal of Alloys and Compounds | 2022年 / 919卷

基金：

中国国家自然科学基金;

关键词：

Carbon anodes - Carbon-coated - Effective management - Lithium storages - Performance - Porous carbons - Porous structures - Recycled silicon kerf waste - Silicon carbon - Silicon/carbon anode;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effective management of silicon kerf waste produced from silicon wafer cutting processes of photovoltaic industry is of great significance for environmental protection and resources recycle. High-purity silicon kerf waste collected by acid-assisted separation and purification can be recycled as silicon source of silicon-based anode for lithium storage. Although volume volatility and low conductivity rooted in silicon anode are effectively handled by constructing carbon coated silicon composite with porous structure, it is always impeded by a HF-involved synthesis process for etching SiO2 as template. Here, a green systhesis approach for porous carbon encapsulated recycled silicon kerf waste (Si@PC) are reasonably designed that calcium carbonate (CaCO3) constructed as sacrificial layer is effortlessly removed away by HCl-assisted pickling, leaving porous structure. When evaluated in LIBs, the discharge capacity keeps at 712.6 mAhg−1 after 200th cycle at 0.5 Ag−1, whose initial capacity reaches to 2739.2 mAhg−1; Meanwhile, it demonstrates a significantly improved rate performance. In brief, this work provides a green and low-cost method to synthesize high-performance silicon/carbon composite with porous structure as anode for lithium storage based on recycled silicon kerf waste, meanwhile offers a new viewpoint for the effective management of silicon kerf waste from photovoltaic industry with high value. © 2022 Elsevier B.V.

引用