期刊
CHEMICAL ENGINEERING JOURNAL
卷 422, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129890
关键词
ZnMn2O4 nanotube arrays; Defect modulation; Durability; High rate capability; Flexible quasi-solid-state
资金
- Hainan Provincial Science and Technology Project [ZDYF2019160]
- Basic and Applied Basic Research Project of Guangdong Province [2019A1515110827]
- Science and Technology Planning Project of Guangzhou [201804010196]
- Education Commission of Guangdong Province [2019GKTSCX015]
- Advanced Functional Materials Scientific Research and Technical Service Team [X20190197]
- Natural Science Project of Guangdong Industry Polytechnic [KJ2020-006]
The novel N-doping coupled oxygen vacancies modulated ZMO nanotube arrays (NTAs) exhibit excellent capacity, rate capability, and long-term durability as a high-performance cathode for rechargeable ZIBs.
The exploration of a stable and high-rate cathode is very important for rechargeable Zn ion batteries (ZIBs). With unique merits of rich abundance, low price, and environmental friendliness, spinel ZnMn2O4 (ZMO) hold great promise as a cathode material for ZIBs. However, its inherent low electronic conductivity and large volume variation in the process of charge/discharge severely restrict the rate capability and durability. Herein, the novel N-doping coupled oxygen vacancies modulated ZMO nanotube arrays (NTAs) (N-ZMO NTAs) are fabricated as high-performance cathode for rechargeable ZIBs. Taking advantages of high electrical conductivity, fast ion diffusion, high surface area, sufficient active sites, and stable hollow nanotubular architecture, the N-ZMO NTAs show an admirable capacity (223 mA h g-1 at 0.1 A g-1), decent rate capability (133.3 mA h g-1 at 4 A g-1) and distinguished long-term durability (92.1% after 1500 cycles). Furthermore, a flexible quasi-solid-state ZIBs is fabricated with N-ZMO NTAs cathode, which achieves favorable energy density (214.6 W h kg-1), superb power density (4 kW kg-1), and impressive long-term stability (88.6% after 1500 cycles), outperforming most state-ofthe-art ZIBs. This study may shed light on designing advanced cathodes for advanced ZIBs.
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