期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 102, 期 -, 页码 46-55出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.07.007
关键词
Hollow nanoboxes; Bimetallic oxides; DFT calculation; Alkali metal ion batteries
资金
- National Natural Science Foun-dation of China [52072307, 3H-2000PS2]
In this article, CoZn-based hollow nanoboxes with electrochemical synergy are prepared in a simple way. The structure effectively shortens the transmission distance of ions and electrons, alleviates volume expansion, and provides more active sites for electrochemical reactions. The electrode exhibits stable cycle performance and long cycle life, demonstrating its practical application value.
Hollow nanostructures are extremely attractive in energy storage and show broad application prospects. But the preparation method is accompanied by a complicated process. In this article, the CoZn-based hollow nanoboxes with electrochemical synergy are prepared in a simple way. This structure can effectively shorten the transmission distance of ions and electrons, and alleviate the volume expansion during the cycle. In particular, bimetallic oxides are rich in oxygen vacancies, providing more active sites for electro-chemical reactions. In addition, the stepwise oxidation-reduction reaction can also improve the volume change of the electrode material. According to the kinetic analysis and density functional theory (DFT) calculation, it is confirmed that the synergistic effect of the bimetallic oxide can accelerate the reaction kinetics. Based on these characteristics, the electrode exhibits stable cycle performance and long cycle life in alkali metal ion batteries, and can provide reversible capacities of 302.1 (LIBs, 2000 cycles), 172.5 (SIBs, 10000 cycles) and 109.6 (PIBs, 5000 cycles) mA h g(-1) at a current density of 1.0 A g(-1), respectively. In addition, by assembling (LiCoO2//CoZn-O-2) and (Na3V2(PO4)(3)//CoZn-O-2) full-cells, the practical application value is demonstrated. The sharing of this work introduces a simple way to synthesize hollow nanoboxes, and shows excellent electrochemical performance, which can also be expanded in other areas. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据