Journal
NANO LETTERS
Volume 20, Issue 4, Pages 2899-2906Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00732
Keywords
Vanadium-based compounds; robust architecture; aqueous rechargeable zinc-ion batteries; cathode dissolution; long-term cyclability
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Funding
- National Natural Science Foundation of China [21871164, 21971145, U1764258]
- Taishan Scholar Project Foundation of Shandong Province [ts20190908]
- Natural Science Foundation of Shandong Province [ZR2019MB024]
- Young Scholars Program of Shandong University [2017WLJH15]
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Vanadium-based compounds with an open framework structure have become the subject of much recent investigation into aqueous zinc-ion batteries (AZIBs) due to high specific capacity. However, there are some issues with vanadium dissolution from a cathode framework as well as the generation of byproducts during discharge that should not be ignored, which could cause severe capacity deterioration and inadequate cycle life. Herein, we report several barium vanadate nanobelt cathodes constructed of two sorts of architectures, i.e., Ba1.2V6O16 center dot 3H(2)O and BaV6O16 center dot 3H(2)O (V3O8 -type) and Ba(x)V(2)O5 center dot nH(2)O (V2O3-type), which are controllably synthesized by tuning the amount of barium precursor. Benefiting from the robust architecture, layered BaxV3O8-type nanobelts (Ba(12)V(6)O16 center dot 3H(2)O) exhibit superior rate capability and long-term cyclability owing to fast zinc-ion kinetics, enabled by efficiently suppressing cathode dissolution as well as greatly eliminating the generation of byproduct Zn4SO4(OH)(6)center dot xH(2)O, which provides a reasonable strategy to engineer cathode materials with robust architectures to improve the electrochemical performance of AZIBs.
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