Simultaneous Regulation of Solvation Shell and Oriented Deposition toward a Highly Reversible Fe Anode for All-Iron Flow Batteries

doi:10.1002/smll.202204356

IMR OpenIR

	Simultaneous Regulation of Solvation Shell and Oriented Deposition toward a Highly Reversible Fe Anode for All-Iron Flow Batteries
	Song, Yuxi 1,2; Yan, Hui 1,2; Hao, Huanhuan 1,2; Liu, Zihe 1,2; Yan, Chuanwei 1; Tang, Ao 1
通讯作者	Tang, Ao(a.tang@imr.ac.cn)
	2022-10-30
发表期刊	SMALL
ISSN	1613-6810
页码	10
摘要	Developing low-cost all-iron hybrid redox flow batteries (RFBs) presents a practical alternative to the high-cost all-vanadium RFBs and is deemed vital for grid-scale energy storage applications. However, the intrinsically poor Fe anode reversibility associated with the deposition and dissolution of metallic iron greatly limits the cycling performance and long-term stability of all-iron hybrid RFBs. Herein, a highly reversible and dendrite-free Fe anode is reported for all-iron RFBs through regulation of polar solvent dimethyl sulfoxide (DMSO) on FeCl2 anolyte, which simultaneously reshapes Fe2+ solvation structure and induces controllable oriented Fe deposition. Combining both experimental and theoretical analyses, the polar DMSO additives prove effective in replacing H2O molecule from the primary solvation shell of Fe2+ cation via the Fe2+-O (DMSO) bond and meanwhile induces a fine-grained Fe nucleation on the preferred Fe (110) plane, which are responsible for the minimized hydrogen evolution and dendrite-free Fe deposition that significantly enhance Fe anode reversibility. The all-iron RFB based on the proposed FeCl2-DMSO anolyte demonstrates an excellent combination of peak power density of 134 mW cm(-2), high energy efficiency of 75% at 30 mA cm(-2), and high capacity retention of 98.6% over 200 cycles, which presents the best performance of all-iron RFBs among previously reported research.
关键词	Fe anodes flow batteries oriented deposition polar solvents solvation shells
资助者	Natural Science Foundation of Liaoning Province
DOI	10.1002/smll.202204356
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Liaoning Province[2020-MS-012]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000876134100001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176423
专题	中国科学院金属研究所
通讯作者	Tang, Ao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Song, Yuxi,Yan, Hui,Hao, Huanhuan,et al. Simultaneous Regulation of Solvation Shell and Oriented Deposition toward a Highly Reversible Fe Anode for All-Iron Flow Batteries[J]. SMALL,2022:10.
APA	Song, Yuxi,Yan, Hui,Hao, Huanhuan,Liu, Zihe,Yan, Chuanwei,&Tang, Ao.(2022).Simultaneous Regulation of Solvation Shell and Oriented Deposition toward a Highly Reversible Fe Anode for All-Iron Flow Batteries.SMALL,10.
MLA	Song, Yuxi,et al."Simultaneous Regulation of Solvation Shell and Oriented Deposition toward a Highly Reversible Fe Anode for All-Iron Flow Batteries".SMALL (2022):10.