期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 542, 期 -, 页码 81-90出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.01.126
关键词
Three-dimensional graphene; Tin oxide; Composite; Lithium-ion battery; Anode material
资金
- National Natural Science Foundation of China (NSFC) [51772078, 61204078, 21671059, U1304505]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-17R36]
- 111 project [D177007]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [154200510009]
- Program for Innovative Research Team and Individuals (in Science and Technology) in University of Henan Province [18IRTSTHNO02, 15HASTIT006, 18HASTIT015]
- Science and Technology Research Projects of Henan province [162102210268, 162300410174]
Three-dimensional reduced graphene oxide@SnO2@nitrogen-doped carbon (3DG@SnO2@N-C) composites are designed as high efficiency anode materials for lithium-ion batteries. The SnO2 particle size, surface area and pore size distribution of the 3DG@SnO2@N-C could be simply controlled by altering the GO dosages. The optimized 3DG@SnO2@N-C electrode demonstrates a reversible capacity of 1349.5 mAh g(-1 )after 100 cycles at the current density of 100 mA g(-1). Based on the structural and electrochemical dynamic tests, the bi-functional N-doped carbon coating layer could serve as both conductive channel for electron transport and as buffer layer to alleviate the volume change of embedded SnO2 NPs. In addition, the cross-linked conducting 3DG with porous structure attributes to the reduced electron transport and Li ion diffusion resistances, which finally leads to the enhanced cycling stability and rate performances. (C) 2019 Elsevier Inc. All rights reserved.
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