Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials

doi:10.1088/1674-1056/28/6/068201

	Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials
	Lu, Hao 1,2; Wang, Junyang 1,2; Liu, Bonan 3; Chu, Geng 4; Zhou, Ge 1,2; Luo, Fei 5; Zheng, Jieyun 1,2; Yu, Xiqian 1,2; Li, Hong 1,2
刊名	CHINESE PHYSICS B
	2019-06-01
卷号	28 期号:6 页码:8
关键词	lithium-ion battery silicon monoxide carbon coating anode material
ISSN号	1674-1056
DOI	10.1088/1674-1056/28/6/068201
英文摘要	Silicon monoxide (SiO) has been considered as one of the most promising anode materials for next generation highenergy-density Li-ion batteries (LiBs) thanks to its high theoretical capacity. However, the poor intrinsic electronic conductivity and large volume change during lithium intercalation/de-intercalation restrict its practical applications. Fabrication of SiO/C composites is an effective way to overcome these problems. Herein, a series of micro-sized SiO@C/graphite (SiO@C/G) composite anode materials, with designed capacity of 600 mAh.g(-1), are successfully prepared through a pitch pyrolysis reaction method. The electrochemical performance of SiO@ C/G composite anodes with different carbon coating contents of 5 wt%, 10 wt%, 15 wt%, and 35 wt% is investigated. The results show that the SiO@C/G composite with 15-wt% carbon coating content exhibits the best cycle performance, with a high capacity retention of 90.7% at 25 degrees C and 90.1% at 45 degrees C after 100 cycles in full cells with LiNi0.5Co0.2Mn0.3O2 as cathodes. The scanning electron microscope (SEM) and electrochemistry impedance spectroscopy (EIS) results suggest that a moderate carbon coating layer can promote the formation of stable SEI film, which is favorable for maintaining good interfacial conductivity and thus enhancing the cycling stability of SiO electrode.
资助项目	State Grid Technology Project, China[DG71-17-010] ; National Key Research and Development Program of China[2017YFB0102004] ; National Natural Science Foundation of China[51822211]
WOS关键词	LITHIUM-ION BATTERIES ; SILICON
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000471658000001
资助机构	State Grid Technology Project, China ; National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/30016]
专题	中国科学院过程工程研究所
通讯作者	Yu, Xiqian; Li, Hong
作者单位	1.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci CAS, Sch Phys Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Chem, CAS Res Grp High Energy Dens Lithium Batteries EV, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 5.Tianmulake Excellent Anode Mat Co Ltd, Changzhou 213300, Peoples R China
推荐引用方式 GB/T 7714	Lu, Hao,Wang, Junyang,Liu, Bonan,et al. Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials[J]. CHINESE PHYSICS B,2019,28(6):8.
APA	Lu, Hao.,Wang, Junyang.,Liu, Bonan.,Chu, Geng.,Zhou, Ge.,...&Li, Hong.(2019).Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials.CHINESE PHYSICS B,28(6),8.
MLA	Lu, Hao,et al."Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials".CHINESE PHYSICS B 28.6(2019):8.