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High performance and long cycle life neutral zinc-iron flow batteries enabled by zinc-bromide complexation
Yang, Minghui1; Xu, Zhizhao1; Xiang, Weizhe1; Xu, He1; Ding, Mei1,2; Li, Liangyu1; Tang, Ao3; Gao, Runhua4,5; Zhou, Guangmin4,5; Jia, Chuankun1,2
Corresponding AuthorDing, Mei(dingmei@csust.edu.cn) ; Tang, Ao(a.tang@imr.ac.cn) ; Zhou, Guangmin(guangminzhou@sz.tsinghua.edu.cn) ; Jia, Chuankun(jiachuankun@csust.edu.cn)
2022
Source PublicationENERGY STORAGE MATERIALS
ISSN2405-8297
Volume44Pages:433-440
AbstractZinc-based flow batteries have attracted tremendous attention owing to their outstanding advantages of high theoretical gravimetric capacity, low electrochemical potential, rich abundance, and low cost of metallic zinc. Among which, zinc-iron (Zn/Fe) flow batteries show great promise for grid-scale energy storage. However, they still face challenges associated with the corrosive and environmental pollution of acid and alkaline electrolytes, hydrolysis reactions of iron species, poor reversibility and stability of Zn/Zn2+ redox couple. In this work, bromide ions are used to stabilize zinc ions via complexation interactions in the cost-effective and eco-friendly neutral electrolyte. Cyclic voltammetry results reveal that the redox reversibility between Zn and stabilized Zn2+ is greatly improved. The results of spectrum characterizations and density functional theory calculations verify that the formation of Zn[Br-n(H2O)(6-n)](2-n) (1 <= n <= 4, n is integer.) ions accounts for the increased electrochemical reversibility of Zn/Zn2+ pair. Moreover, to overcome the bottleneck of slow kinetics of the coordination interactions between Zn2+ and Br-, ZnBr2 is judiciously selected as the electrolyte additive to promote the complexation process. Adopting K3Fe(CN)(6) as the positive redox species to pair with the zinc anode with ZnBr2 modified electrolyte, the proposed neutral Zn/Fe flow batteries deliver excellent efficiencies and superior cycling stability over 2000 cycles (356 h), shedding light on their great potential for large scale energy storage.
KeywordZn/Fe flow batteries Electrochemical energy storage Electrolyte additive Redox reversibility Complexation interaction
Funding Organization100 Talented Team of Hunan Province ; Huxiang High-level talents programs ; Natural Science Foundation of Hunan Province ; Open Fund of National Engineering Laboratory of Highway Maintenance Technology (Changsha Univeristy of Science Technology) ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Shenzhen Geim Graphene Center
DOI10.1016/j.ensm.2021.10.043
Indexed BySCI
Language英语
Funding Project100 Talented Team of Hunan Province[[2016] 91] ; Huxiang High-level talents programs[2018RS3077] ; Huxiang High-level talents programs[2019RS1046] ; Natural Science Foundation of Hunan Province[2020JJ5566] ; Open Fund of National Engineering Laboratory of Highway Maintenance Technology (Changsha Univeristy of Science Technology)[kjf170105] ; National Key Research and Development Program of China[2019YFA0705700] ; National Natural Science Foundation of China[52072205] ; Shenzhen Geim Graphene Center
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000744237700006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173677
Collection中国科学院金属研究所
Corresponding AuthorDing, Mei; Tang, Ao; Zhou, Guangmin; Jia, Chuankun
Affiliation1.Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China
2.Changsha Univ Sci & Technol, Sch Traff & Transportat Engn, Natl Engn Lab Highway Maintenance Technol, Changsha 410114, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
4.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Geim Graphene Ctr, Shenzhen 518055, Peoples R China
5.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Yang, Minghui,Xu, Zhizhao,Xiang, Weizhe,et al. High performance and long cycle life neutral zinc-iron flow batteries enabled by zinc-bromide complexation[J]. ENERGY STORAGE MATERIALS,2022,44:433-440.
APA Yang, Minghui.,Xu, Zhizhao.,Xiang, Weizhe.,Xu, He.,Ding, Mei.,...&Jia, Chuankun.(2022).High performance and long cycle life neutral zinc-iron flow batteries enabled by zinc-bromide complexation.ENERGY STORAGE MATERIALS,44,433-440.
MLA Yang, Minghui,et al."High performance and long cycle life neutral zinc-iron flow batteries enabled by zinc-bromide complexation".ENERGY STORAGE MATERIALS 44(2022):433-440.
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