High Entropy Oxides Modulate Atomic‐Level Interactions for High‐Performance Aqueous Zinc‐Ion Batteries

Author:

Du Kai1ORCID,Liu Yujie1,Yang Yunfei1ORCID,Cui Fangyan1ORCID,Wang Jinshu1ORCID,Han Mingshan1ORCID,Su Jingwen1ORCID,Wang Jiajun2,Han Xiaopeng2ORCID,Hu Yuxiang1ORCID

Affiliation:

1. Key Laboratory of Advanced Functional Materials of Education Ministry of China Faculty of Engineering and Manufacturing Beijing University of Technology Beijing 100124 China

2. School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) National Industry‐Education Platform of Energy Storage Tianjin University Tianjin 300072 China

Abstract

AbstractThe strong electrostatic interaction between high‐charge‐density zinc ions (112 C mm−3) and the fixed crystallinity of traditional oxide cathodes with delayed charge compensation hinders the development of high‐performance aqueous zinc‐ion batteries (AZIBs). Herein, to intrinsically promote electron transfer efficiency and improve lattice tolerance, a revolutionary family of high‐entropy oxides (HEOs) materials with multipath electron transfer and remarkable structural stability as cathodes for AZIBs is proposed. Benefiting from the unique “cock‐tail” effect, the interaction of diverse type metal‐atoms in HEOs achieves essentially broadened d‐band and lower degeneracy than monometallic oxides, which contribute to convenient electron transfer and one of the best rate‐performances (136.2 mAh g−1 at 10.0 A g−1) in AZIBs. In addition, the intense lattice strain field of HEOs is highly tolerant to the electrostatic repulsion of high‐charge‐density Zn2+, leading to the outstanding cycling stability in AZIBs. Moreover, the super selectability of elements in HEOs exhibits significant potential for AZIBs.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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