Graphene Oxide Gel-Derived, Free-Standing, Hierarchically Porous Carbon for High-Capacity and High-Rate Rechargeable Li-O2 Batteries

	Graphene Oxide Gel-Derived, Free-Standing, Hierarchically Porous Carbon for High-Capacity and High-Rate Rechargeable Li-O2 Batteries
	Wang ZL ; Xu D ; Xu JJ ; Zhang LL ; Zhang XB
刊名	advanced functional materials
	2012
卷号	22 期号:17 页码:3699-3705
关键词	LITHIUM OXYGEN BATTERIES AIR BATTERIES ION BATTERIES LI-AIR ENERGY-STORAGE ELECTRODE PERFORMANCE NANOSHEETS REDUCTION CATALYSTS
ISSN号	1616-301x
通讯作者	wang zl
中文摘要	lithium-oxygen (li-o2) batteries are one of the most promising candidates for high-energy-density storage systems. however, the low utilization of porous carbon and the inefficient transport of reactants in the cathode limit terribly the practical capacity and, in particular, the rate capability of state-of-the-art li-o2 batteries. here, free-standing, hierarchically porous carbon (fhpc) derived from graphene oxide (go) gel in nickel foam without any additional binder is synthesized by a facile and effective in situ sol-gel method, wherein the go not only acts as a special carbon source, but also provides the framework of a 3d gel; more importantly, the proper acidity via its intrinsic cooh groups guarantees the formation of the whole structure. interestingly, when employed as a cathode for li-o2 batteries, the capacity reaches 11 060 ma h g-1 at a current density of 0.2 ma cm-2 (280 ma g-1); and, unexpectedly, a high capacity of 2020 ma h g-1 can be obtained even the current density increases ten times, up to 2 ma cm-2 (2.8 a g-1), which is the best rate performance for li-o2 batteries reported to date. this excellent performance is attributed to the synergistic effect of the loose packing of the carbon, the hierarchical porous structure, and the high electronic conductivity of the ni foam.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000308329800021
公开日期	2013-04-23
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/47949]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Wang ZL,Xu D,Xu JJ,et al. Graphene Oxide Gel-Derived, Free-Standing, Hierarchically Porous Carbon for High-Capacity and High-Rate Rechargeable Li-O2 Batteries[J]. advanced functional materials,2012,22(17):3699-3705.
APA	Wang ZL,Xu D,Xu JJ,Zhang LL,&Zhang XB.(2012).Graphene Oxide Gel-Derived, Free-Standing, Hierarchically Porous Carbon for High-Capacity and High-Rate Rechargeable Li-O2 Batteries.advanced functional materials,22(17),3699-3705.
MLA	Wang ZL,et al."Graphene Oxide Gel-Derived, Free-Standing, Hierarchically Porous Carbon for High-Capacity and High-Rate Rechargeable Li-O2 Batteries".advanced functional materials 22.17(2012):3699-3705.