In-situ construction of porous Si@C composites with LiCl template to provide silicon anode expansion buffer

doi:10.1016/j.carbon.2020.11.042

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	In-situ construction of porous Si@C composites with LiCl template to provide silicon anode expansion buffer
	Dong, Hong 1,2; Fu, Xiaolan 1; Wang, Jie 1; Wang, Peng 1; Ding, Hao 1; Song, Ru 1; Wang, Shimin 1; Li, Runrun 1; Li, Shiyou 1,2
刊名	Carbon
	2021-03-01
卷号	173 页码:687-695
关键词	Anodes Composite structures Dealloying Electric discharges Green manufacturing Indium compounds Lithium Chloride Silicon Silicon compounds Solid electrolytes Alternative anodes Charge and discharge Electrochemical performance High energy densities In-situ construction Industrialized production Large scale preparation Solid electrolyte interphase film
ISSN号	00086223
DOI	10.1016/j.carbon.2020.11.042
英文摘要	Silicon-based anode material is one of the most promising alternative anodes for graphite due to its advantages of abundant reserves, environmental protection and high-energy-density. However, silicon still cannot be directly applied commercially as anode materials owing to the existences of huge volume change during the alloying and dealloying process. Herein, porous Si@C composites are prepared by employment of nano silicon as the active substance particles, lithium chloride as the template and pitch powder as the carbon precursor. Results of electrochemical performance tests show that the cell based on the in-situ prepared porous Si@C composites deliver a reversible good cycle stability. Besides, porous Si@C composites show a lower thickness expansion rate of electrode (15.38%), compared with pure nano silicon (162.46%) and conventional Si@C anodes (40.24%), respectively. It is believed that the improved performance is benefitted from the porous structure, which provides a buffer for the expansion of silicon, reduces the volume expansion of the electrode during the charge and discharge process, and thus inhibits the damage to the solid electrolyte interphase film outside the Si@C composites. This work provides an environmentally friendly method to prepare porous Si@C composite anode materials, which is suitable for large-scale preparation and industrialized production. © 2020 Elsevier Ltd
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000625347900030
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147237]
专题	石油化工学院
作者单位	1.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Gansu Engineering Laboratory of Electrolyte Material for lithium-ion Battery, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Dong, Hong,Fu, Xiaolan,Wang, Jie,et al. In-situ construction of porous Si@C composites with LiCl template to provide silicon anode expansion buffer[J]. Carbon,2021,173:687-695.
APA	Dong, Hong.,Fu, Xiaolan.,Wang, Jie.,Wang, Peng.,Ding, Hao.,...&Li, Shiyou.(2021).In-situ construction of porous Si@C composites with LiCl template to provide silicon anode expansion buffer.Carbon,173,687-695.
MLA	Dong, Hong,et al."In-situ construction of porous Si@C composites with LiCl template to provide silicon anode expansion buffer".Carbon 173(2021):687-695.