气候变化领域集成服务门户(CCPortal): Dendrite-free Zn electrodeposition triggered by interatomic orbital hybridization of Zn and single vacancy carbon defects for aqueous Zn-based flow batteries

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DOI	10.1039/d0ee00723d
	Dendrite-free Zn electrodeposition triggered by interatomic orbital hybridization of Zn and single vacancy carbon defects for aqueous Zn-based flow batteries
	Lee J.-H.; Kim R.; Kim S.; Heo J.; Kwon H.; Yang J.H.; Kim H.-T.
发表日期	2020
ISSN	1754-5692
起始页码	2839
结束页码	2848
卷号	13 期号:9
英文摘要	Aqueous zinc (Zn)-based flow batteries are an attractive option for energy storage systems due to their inflammability and high energy density. However, Zn dendrite formation, which causes internal short circuiting and capacity drop, limits the long-term operation of Zn-based flow batteries. Here, we present highly stable Zn deposition/dissolution achieved by a defective carbon surface. DFT calculations and electrochemical analysis demonstrate that a single vacancy carbon defect prevents the surface diffusion of Zn and consequent aggregative Zn growth by forming a strong orbital hybridization between Zn and the dangling bonds of the defect. Triggered by the interatomic interaction, a defective carbon-decorated electrode achieves dendrite-free Zn deposition and excellent cycling stability in zinc-bromine flow batteries (ZBBs) over 5000 cycles at 100 mA cm-2 and 20 mA h cm-2, while maintaining coulombic efficiency above 97%. The deeper understanding of defect chemistry provides a new scientific strategy to engineer advanced Zn-based aqueous batteries. This journal is © The Royal Society of Chemistry.
语种	英语
scopus关键词	Carbon; Dangling bonds; Deposition; Electrodes; Energy storage; Zinc; Zinc deposits; Coulombic efficiency; Dendrite formation; Electrochemical analysis; Energy storage systems; High energy densities; Interatomic interactions; Orbital hybridization; Zn electrodepositions; Flow batteries; aqueous solution; electrochemistry; equipment component; hybridization; zinc
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162585
作者单位	Department of Chemical and Biomolecular Engineering, KAIST, 291 Daehak-ro, Yuseong-gu Daejeon, 34141, South Korea; Advanced Battery Center, KAIST, Institute for the NanoCentury, KAIST, 291, Daehak-ro, Yuseong-gu Daejeon, 34141, South Korea; Energy Storage Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu Daejeon, 34129, South Korea
推荐引用方式 GB/T 7714	Lee J.-H.,Kim R.,Kim S.,et al. Dendrite-free Zn electrodeposition triggered by interatomic orbital hybridization of Zn and single vacancy carbon defects for aqueous Zn-based flow batteries[J],2020,13(9).
APA	Lee J.-H..,Kim R..,Kim S..,Heo J..,Kwon H..,...&Kim H.-T..(2020).Dendrite-free Zn electrodeposition triggered by interatomic orbital hybridization of Zn and single vacancy carbon defects for aqueous Zn-based flow batteries.Energy and Environmental Science,13(9).
MLA	Lee J.-H.,et al."Dendrite-free Zn electrodeposition triggered by interatomic orbital hybridization of Zn and single vacancy carbon defects for aqueous Zn-based flow batteries".Energy and Environmental Science 13.9(2020).