Du Kai, Liu Yujie, Yang Yunfei, Cui Fangyan, Wang Jinshu, Han Mingshan, Su Jingwen, Wang Jiajun, Han Xiaopeng, Hu Yuxiang
Key Laboratory of Advanced Functional Materials of Education Ministry of China, Faculty of Engineering and Manufacturing, Beijing University of Technology, Beijing, 100124, China.
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.
Adv Mater. 2023 Dec;35(51):e2301538. doi: 10.1002/adma.202301538. Epub 2023 Nov 10.
The strong electrostatic interaction between high-charge-density zinc ions (112 C mm ) 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 at 10.0 A g ) in AZIBs. In addition, the intense lattice strain field of HEOs is highly tolerant to the electrostatic repulsion of high-charge-density Zn , leading to the outstanding cycling stability in AZIBs. Moreover, the super selectability of elements in HEOs exhibits significant potential for AZIBs.
高电荷密度锌离子（112 C/mm）与传统氧化物阴极固定结晶度之间的强静电相互作用以及电荷补偿延迟，阻碍了高性能水系锌离子电池（AZIBs）的发展。在此，为了从本质上提高电子转移效率并改善晶格耐受性，提出了一种具有多路径电子转移和显著结构稳定性的新型高熵氧化物（HEOs）材料作为AZIBs的阴极。受益于独特的“鸡尾酒”效应，HEOs中多种类型金属原子的相互作用实现了比单金属氧化物更宽的d带和更低的简并度，这有助于实现便捷的电子转移以及在AZIBs中实现最佳倍率性能之一（在10.0 A/g下为136.2 mAh/g）。此外，HEOs强烈的晶格应变场对高电荷密度Zn²⁺的静电排斥具有高度耐受性，从而在AZIBs中实现了出色的循环稳定性。此外，HEOs中元素的超选择性在AZIBs中展现出巨大潜力。
