气候变化领域集成服务门户(CCPortal): Crystal water for high performance layered manganese oxide cathodes in aqueous rechargeable zinc batteries

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DOI	10.1039/c9ee00718k
	Crystal water for high performance layered manganese oxide cathodes in aqueous rechargeable zinc batteries
	Nam K.W.; Kim H.; Choi J.H.; Choi J.W.
发表日期	2019
ISSN	1754-5692
起始页码	1999
结束页码	2009
卷号	12 期号:6
英文摘要	Aqueous zinc (Zn)-ion batteries are gaining considerable attention as grid-scale energy storage systems due to their advantages in rate performance, cost, and safety. Here, we report a layered manganese oxide that contains a high content of crystal water (∼10 wt%) as an aqueous zinc battery cathode. The interlayer crystal water can effectively screen the electrostatic interactions between Zn2+ ions and the host framework to facilitate Zn2+ diffusion while sustaining the host framework for prolonged cycles. By virtue of these 'water' effects, this material exhibits a high reversible capacity of 350 mA h g-1 at 100 mA g-1, along with decent cycling and rate performance, in a two-electrode cell configuration. Density functional theory (DFT) calculations and extended X-ray absorption fine structure (EXAFS) analyses jointly reveal that upon Zn2+ ion intercalation, a stable inner-sphere Zn-complex coordinated with water molecules is formed, followed by the formation of a Zn-Mn dumbbell structure, which gives a clue for the observed electrochemical performance. This work unveils the useful function of crystal water in enhancing the key electrochemical performance of emerging divalent battery electrodes. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Binary alloys; Cathodes; Coordination reactions; Density functional theory; Electrochemical electrodes; Extended X ray absorption fine structure spectroscopy; Ions; Manganese alloys; Manganese oxide; Manganese removal (water treatment); Molecules; Oxides; Secondary batteries; Water absorption; X ray absorption; Zinc alloys; Battery electrode; Electrochemical performance; Energy storage systems; Extended x-ray absorption fine structure analysis; High reversible capacities; Ion intercalation; Layered manganese oxide; Two electrode cells; Zinc compounds; aqueous solution; crystal structure; electrode; fuel cell; manganese oxide; performance assessment; 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/162694
作者单位	Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu Daejeon, 34141, South Korea; Electron Microscopy Research Center, Korea Basic Science Institute, 169-148 Gwahak-ro, Yuseong-gu Daejeon, 34133, South Korea; KEPCO Research Institute, Korea Electric Power Corporation, 105 Munji-ro, Yuseong-gu Daejeon, 34056, South Korea; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu Seoul, 08826, South Korea
推荐引用方式 GB/T 7714	Nam K.W.,Kim H.,Choi J.H.,et al. Crystal water for high performance layered manganese oxide cathodes in aqueous rechargeable zinc batteries[J],2019,12(6).
APA	Nam K.W.,Kim H.,Choi J.H.,&Choi J.W..(2019).Crystal water for high performance layered manganese oxide cathodes in aqueous rechargeable zinc batteries.Energy and Environmental Science,12(6).
MLA	Nam K.W.,et al."Crystal water for high performance layered manganese oxide cathodes in aqueous rechargeable zinc batteries".Energy and Environmental Science 12.6(2019).