Superior high-rate capability of hierarchically structured flower-like magnetite-carbon-graphene composite for Li-ion anode

IMR OpenIR

	Superior high-rate capability of hierarchically structured flower-like magnetite-carbon-graphene composite for Li-ion anode
	Q. Z.; Guo Guo, X. H.; Du, K. Q.; Ge, H.; Wang, F. H.
	2015
发表期刊	International Journal of Hydrogen Energy
ISSN	0360-3199
卷号	40 期号:4 页码:1846-1851
摘要	A nano/micro hierarchical composite structure is prepared by solvothermal synthesis from iron alkoxide in an inert atmosphere. It consists of graphene sheet and flower-like Fe3O4 particle covered by carbon coating (designated as Fe3O4@C). The synthesized composite is an excellent anode for Li-ion batteries. This is attributed to its double structure of current collector. High reversible lithium storage capacity (1439 mA h/g at 0.2 C after 47 cycles) and superior high-rate capability (619 mA h/g at 5 C) are examples of this property. The carbon coating of the Fe3O4@C is in direct contact with the Fe3O4 particles to form local conductive connections, Fe3O4@C tightly covering graphene sheets can be employed as the current collector as well as bridge connection of the Fe3O4@C particles. Therefore, the double structure of current collector can form superior-conductivity networks, providing an efficient electron transport between active materials and Cu current collectors. This double structure prevents the break down of electric connection between the active material and the current collector during protracted cycles of charge and discharge. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
部门归属	[guo, quanzhong ; guo, xinghua ; du, keqin ; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. [ge, hao] liaoning univ, coll chem, liaoning key lab green synth & preparat chem adv, shenyang 110036, peoples r china. ; du, kq (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; kqdu@imr.ac.cn
关键词	Li-ion Anode Magnetite High-rate Capability Graphene Fe3o4 Nanocrystals Lithium Storage Batteries Capacity Nanocomposites Nanospheres
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73807
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. Z.,Guo Guo, X. H.,Du, K. Q.,et al. Superior high-rate capability of hierarchically structured flower-like magnetite-carbon-graphene composite for Li-ion anode[J]. International Journal of Hydrogen Energy,2015,40(4):1846-1851.
APA	Q. Z.,Guo Guo, X. H.,Du, K. Q.,Ge, H.,&Wang, F. H..(2015).Superior high-rate capability of hierarchically structured flower-like magnetite-carbon-graphene composite for Li-ion anode.International Journal of Hydrogen Energy,40(4),1846-1851.
MLA	Q. Z.,et al."Superior high-rate capability of hierarchically structured flower-like magnetite-carbon-graphene composite for Li-ion anode".International Journal of Hydrogen Energy 40.4(2015):1846-1851.