A mixed-valence polyoxometalate-based 3D inorganic framework cathode material for high-efficiency rechargeable AZIBs

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外文摘要：The global trend towards new energy storage systems has stimulated the development of electrochemical energy storage technologies.Among these technologies,rechargeable aqueous zinc-ion batteries(AZIBs)have attracted considerable interest as a potential alternative to lithium-ion batteries(LIBs)due to their affordable cost,environmental compatibility and high safety standards.In this study,a high-quality electrode for AZIBs has been successfully developed using a dehydrated mixed-valence polyoxometalate-based three-dimensional(3D)inorganic framework material known as[H6Mn3VⅣ15V-Ⅴ4O46(H2O)12](3D-MnVO).This innovative 3D-MnVO material is built from the alternate connections of {V19O46}"sphere-shaped"clusters and p2-{Mn(H2O)4} bridges,where each {V19O46} cluster is surrounded by three pairs of vertically distributed {Mn(H2O)4} units,thus resulting in the 3D interpenetrating grid-like network from the infi-nite[-{V19O46}-μ2-Mn(H2O)4-{V19O46}]∞ chains in three mutually perpendicular directions.The 3D framework structure of 3D-MnVO possesses abundant oxygen vacan-cies,spacious and multi-level interconnected channels for ion transport,which facilitates the efficient intercalation/deintercalation of hydrated Zn2+into the pores of the primary structure via the intercalation capacitance mecha-nism.As a result,the 3D-MnVO electrode exhibits excel-lent diffusion rates and minimal interfacial resistance.At a current density of 0.1 A·g-1,the 3D-MnVO cathode delivers a commendable discharge capacity of 170.5 mAh·g-1 with 81.6％capacity retention after 100 charge/discharge cycles.Furthermore,even at a high current density of 1.0 A·g-1,the 3D-MnVO electrode delivers a remarkable reversible capacity of 198.9 mAh·g-1.Our research results provide valuable insights into the development of advanced polyoxometa-late-based 3D inorganic framework electrode materials for high-performance rechargeable AZIBs.

外文关键词：

CathodePoly oxometalate3D inorganic frameworkZinc-ion batteriesEnergy storage mechanism

作者：

Qing Han、Hao-Ran Xiao、Tao Zhou、Bing-Chuan Li、Liu Yang、Ling-Ling Xie、Xue-Jing Qiu、Xian-Yong Wu、Li-Min Zhu、Xiao-Yu Cao

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作者单位：

School of Chemistry and Chemical Engineering,Henan University of Technology,Zhengzhou 450001,China

Key Laboratory of High Specific Energy Materials for Electrochemical Power Sources of Zhengzhou City,Zhengzhou 450001,China

College of Materials Engineering,Henan University of Engineering,Zhengzhou 450007,China

School of Environmental Engineering,Henan University of Technology,Zhengzhou 450001,China

Department of Chemistry,University of Puerto Rico-Rio Piedras Campus,San Juan,PR 00925,USA

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaZhongyuan Thousand People Plan-The Zhongyuan Youth Talent Support Program(in Science and Technology),ChinaNatural Science Foundation of Henan,ChinaNatural Science Foundation of Henan,ChinaScience and Technology Project of Henan Province,ChinaScience and Technology Project of Henan Province,ChinaKey Scientific Research Programs in Universities of Henan Province,China-Special Projects for Basic ResearchInnovative Funds Plan of Henan University of Technology,ChinaPh.D.Programs Foundation of Henan University of Technology,ChinaDoctoral Education Fund of Henan University of Engineering,China

项目编号：

5207113252261135632U21A20284ZYQR20181013923230042108022230042013823210224103823210224100423ZX0082020ZKCJ042021BS0027DKJ2019004

出版年：

2024

DOI：

10.1007/s12598-024-02671-3

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

年,卷(期)：2024.43(8)