期刊
APPLIED SURFACE SCIENCE
卷 605, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.154660
关键词
Aqueous Zn ions battery; Protective layer; Zn anode; Co-HCF cathode; Stability
类别
资金
- Anyang Normal University, China [AYNUKPY-2019-09]
- Universities of Henan Province, China [21A150004]
Recently, rechargeable aqueous Zn ions batteries based on Co-HCF cathode and Zn anode have gained much attention for their intrinsic safety and high theoretical capacity. However, issues with Zn anode and Co-HCF cathode have limited the practical application of Zn ions batteries. In this study, a protective layer was coated on the Zn anode to improve its stability and ensure uniform Zn deposition, while a polymer layer was coated on the Co-HCF cathode to sustain its structural stability. The resulting Zn ions batteries exhibited high performance and long cyclic life.
Owing to the virtues of intrinsic safety, high theoretical capacity, rechargeable aqueous Zn ions batteries based on cobalt hexacyanoferrate (Co-HCF) cathode and Zn anode have sparked a lot of enthusiasm in the energy storage field recently. However, the issues of Zn anode (such as dendrites formation and sustained hydrogen evolution) and pulverization of Co-HCF cathode seriously restrict the practical application of Zn ions batteries. In this work, a protective layer coated on Zn anode to improve the stability of Zn anode and ensure uniform Zn deposition as well as a polymer layer coated on Co-HCF cathode to sustain the structural stability of Co-HCF. Benefiting from the merits of the protective layer both on the cathode and anode, the obtained Zn ions batte-ries provide a specific capacity (76.9 mAhg-1 at 0.1 Ag-1), outstanding rate capability (50.1 mAhg-1at 1 Ag-1), and outstanding cyclic stability (-91.9 % after 1000 cycles at 1 Ag-1) compared to that of the traditional Zn// Co-HCF (-62.5 %). Thus, this present work supplies a new way to construct high-performance Zn ions batteries with long cyclic life for practical applications.
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