Reversible (De)Intercalation of Hydrated Zn2+ in Mg2+ -Stabilized V2O5 Nanobelts with High Areal Capacity
- Shanghai Univ. (China)
- Wuhan Univ. of Technology (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Department of Chemistry Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Shanghai 200433 P. R. China
- Shanghai Univ. (China); Wuhan Univ. of Technology (China)
The rechargeable aqueous zinc ion battery (ZIB) is regarded as one of the most promising candidates for large-scale energy storage applications due to its low-cost and eco-friendly properties. However, the development of a suitable cathode operating with high areal capacity and uncovering the relevant reaction mechanisms remain challenging. Herein, the application of Mg0.26V2O5∙0.73H2O (MVO) nanobelts as a ZIB cathode is demonstrated. In situ FT-IR reveals the shift of OH stretching from 3350 cm-1 to 3200 cm-1, corresponding to the hydration shell of Zn2+, while in situ Raman suggests the interlayer charges creening effect, which would boost the intercalation of hydrated Zn2+. Density function theory reveals that the hydrated Zn2+ can lower the Coulombic repulsion at the electrode-electrolyte interface and circumvents the desolvation penalty of hydrated Zn2+ during the (de)intercalation process. Additionally, excellent structure stability and large interlayer spacing guarantee the highly reversible (de)intercalation of hydrated Zn2+. Therefore, the MVO nanobelts exhibit a high areal capacity of 2.12 mAh cm-2 at 0.05 A g-1, outstanding cycling stability of 2500 cycles at 10 A g-1 with a mass loading of 5 mg cm-2. Finally, it is believed that the use of hydrated intercalation charge carriers will boost further studies in other multivalent rechargeable batteries.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Natural Science Foundation of China (NSFC); Shanghai Pujiang Program; China Baowu Steel Group Corp. Ltd.; Science and Technology Commission of Shanghai Municipality
- Grant/Contract Number:
- AC02-06CH11357; 51874196; 21905169; 51674164; 2019PJD015; U1860203; 19DZ2270200; CERC-CVC2; AC02‐06CH11357
- OSTI ID:
- 1756573
- Alternate ID(s):
- OSTI ID: 1668101
- Journal Information:
- Advanced Energy Materials, Vol. 10, Issue 41; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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