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Reversible (De)Intercalation of Hydrated Zn2+ in Mg2+ -Stabilized V2O5 Nanobelts with High Areal Capacity

Journal Article · · Advanced Energy Materials
 [1];  [2];  [2];  [3];  [1];  [1];  [4];  [2];  [5];  [1];  [1];  [3]
  1. Shanghai Univ. (China)
  2. Wuhan Univ. of Technology (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Department of Chemistry Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Shanghai 200433 P. R. China
  5. Shanghai Univ. (China); Wuhan Univ. of Technology (China)
+ Show Author Affiliations
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:
China Baowu Steel Group Corp. Ltd.; National Natural Science Foundation of China (NNSFC); Science and Technology Commission of Shanghai Municipality; Shanghai Pujiang Program; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1756573
Alternate ID(s):
OSTI ID: 1668101
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 41 Vol. 10; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
Mg0.26V2O5·0.73H2O
Zinc-ion battery
in-situ FT-IR spectrum
in-situ Raman spectrum
zinc intercalation/deintercalation