Tailoring manganese coordination environment for a highly reversible zinc-manganese flow battery

doi:10.1016/j.jpowsour.2021.230295

IMR OpenIR

	Tailoring manganese coordination environment for a highly reversible zinc-manganese flow battery
	Yu, Xiao 1,2; Song, Yuxi 1,2; Tang, Ao 1
通讯作者	Tang, Ao(a.tang@imr.ac.cn)
	2021-09-30
发表期刊	JOURNAL OF POWER SOURCES
ISSN	0378-7753
卷号	507 页码:8
摘要	Zinc-manganese flow batteries have drawn considerable attentions owing to its advantages of low cost, high energy density and environmental friendliness. On the positive carbon electrode, however, unstable MnO2 depositions can be formed during oxidation through disproportionation reaction of Mn3+, which result in poor reversibility of Mn2+/MnO2 and bring instability to Zn-Mn flow battery limiting its performance and further development. To tackle this issue, in this study, we reported a highly reversible Zn-Mn flow battery by employing EDTA-Mn as the positive electrolyte. In aqueous solutions, EDTA exhibits a strong ligand field for Mn2+ from ab initio calculations, which proves to form bonds with Mn2+ through carboxyl/amino groups and replace bonded waters in the solvation structure of Mn2+. Benefiting from the coordination effect of EDTA, both electrochemical and material characterizations demonstrate a highly reversible Mn2+/Mn3+ redox reaction in EDTA-Mn, which effectively inhibits the disproportionation reaction of Mn3+ without forming any deposited MnO2 on carbon electrode. The constructed Zn-Mn flow cell adopting EDTA-Mn not only demonstrates excellent rate performance with a high CE over 95 % operated at 10-50 mA cm(-2), but also realizes a superior cycling stability over 300 cycles at 20 mA cm(-2) affording 98 % CE and 75 % EE.
关键词	Zinc-manganese flow battery EDTA-Mn Coordination chemistry High reversible Mn2+/Mn3+
资助者	Natural Science Foundation of Liaoning Province ; Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1016/j.jpowsour.2021.230295
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Liaoning Province[2020-MS-012] ; Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000685092300002
出版者	ELSEVIER
引用统计	被引频次：28[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/321006/159294
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, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Yu, Xiao,Song, Yuxi,Tang, Ao. Tailoring manganese coordination environment for a highly reversible zinc-manganese flow battery[J]. JOURNAL OF POWER SOURCES,2021,507:8.
APA	Yu, Xiao,Song, Yuxi,&Tang, Ao.(2021).Tailoring manganese coordination environment for a highly reversible zinc-manganese flow battery.JOURNAL OF POWER SOURCES,507,8.
MLA	Yu, Xiao,et al."Tailoring manganese coordination environment for a highly reversible zinc-manganese flow battery".JOURNAL OF POWER SOURCES 507(2021):8.