Journal
NANO-MICRO LETTERS
Volume 12, Issue 1, Pages -Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-020-0401-y
Keywords
Zinc-ion battery; Ammonium vanadate; NH4V4O10
Funding
- National Key RAMP
- D Research Program of China [2018YFB0905400]
- National Natural Science Foundation of China [51622210, 51872277, 51802007, 21606003, 51972067, 51802044, 51672193, 51420105002, 51920105004, U1910210]
- Fundamental Research Funds for the Central Universities [WK2060140026]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2019B151502039]
- DNL Cooperation Fund, CAS [DNL180310]
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Given the advantages of being abundant in resources, environmental benign and highly safe, rechargeable zinc-ion batteries (ZIBs) enter the global spotlight for their potential utilization in large-scale energy storage. Despite their preliminary success, zinc-ion storage that is able to deliver capacity > 400 mAh g(-1) remains a great challenge. Here, we demonstrate the viability of NH4V4O10 (NVO) as high-capacity cathode that breaks through the bottleneck of ZIBs in limited capacity. The first-principles calculations reveal that layered NVO is a good host to provide fast Zn2+ ions diffusion channel along its [010] direction in the interlayer space. On the other hand, to further enhance Zn2+ ion intercalation kinetics and long-term cycling stability, a three-dimensional (3D) flower-like architecture that is self-assembled by NVO nanobelts (3D-NVO) is rationally designed and fabricated through a microwave-assisted hydrothermal method. As a result, such 3D-NVO cathode possesses high capacity (485 mAh g(-1)) and superior long-term cycling performance (3000 times) at 10 A g(-1) (similar to 50 s to full discharge/charge). Additionally, based on the excellent 3D-NVO cathode, a quasi-solid-state ZIB with capacity of 378 mAh g(-1) is developed.
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