University of Oulu

Wang, S., Xiong, L., Yuan, G., Hu, T., Lassi, U., Wang, B., Bai, J., Wang, G., & Wang, X. (2023). Vanadium dissolution restraint and conductive assistant in MnV12O31·10H2O to boost energy storage property for aqueous zinc-ion batteries. Chemical Engineering Journal, 476, 146883.

Vanadium dissolution restraint and conductive assistant in MnV₁₂O₃₁·10H₂O to boost energy storage property for aqueous zinc-ion batteries

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Author: Wang, Shuting1,2; Xiong, Li1,3; Yuan, Guanghui4;
Organizations: 1State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi’an 710127, PR China
2Research Unit of Sustainable Chemistry, University of Oulu, Oulu 90570, Finland
3Guangyuan Lizhou Secondary Specialized School, Guangyuan 628017, PR China
4Department of Chemistry and Chemical Engineering, Ankang University, Ankang 725000, PR China
5Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, PR China
Format: article
Version: accepted version
Access: embargoed
Persistent link:
Language: English
Published: Elsevier, 2023
Publish Date: 2025-10-23


Hydrated vanadates have gained significant attentions as cathode ingredients for aqueous zinc-ion batteries (AZIBs) on account of their broad open channels in the structural framework together with the existence of crystal water for stabilizing the structure. Yet, the ambiguous zinc storage mechanism and sluggish electrochemical reaction dynamics are always challenging questions for the development of hydrated vanadate cathodes. Herein, a novel hydrated manganese vanadate MnV₁₂O₃₁·10H₂O (MVOH) nanobelt assembled microparticle materials is synthesized and combined with carbon nanofibers (CNFs) to generate MVOH-CNFs composite through electrostatic attraction in the condition of hydrothermal environment. The zinc storage mechanism of the formed MVOH substance as a cathode for AZIBs is clarified by a combined in- and ex-situ characterizations. The advantages of the crystal structure of MVOH to restrain vanadium dissolution and the assistance of CNFs to meliorate reaction kinetics are clarified based on the density functional theory calculations. The MVOH-CNFs cathode with a CNF content of 10.1% exhibits a reversible capacity of 302 mAh g−1 at 2 A g−1 after 100 cycles and 105 mAh g−1 at 8 A g−1 after 5000 cycles with robust structural stability. It also delivers excellent areal and volumetric capacity especially at high current density. A quasi-solid MVOH-CNFs//Zn pouch battery based on a gel electrolyte exhibits stable electrochemical performance and could be curled into a circular shape on the wrist to power a smart watch. This work paves a way for the furtherance of hydrated manganese vanadate cathodes in the application of high performance AZIBs.

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Series: Chemical engineering journal
ISSN: 1385-8947
ISSN-E: 1873-3212
ISSN-L: 1385-8947
Volume: 476
Article number: 146883
DOI: 10.1016/j.cej.2023.146883
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
116 Chemical sciences
Funding: This work was supported by the National Natural Science Foundation of China (No. 22105121 and 51972267), Science Foundation of Shaanxi Province (No. 2022GD-TSLD-15 and 2023-JC-ZD-03), Science Foundation of Ankang City (AK2022-GY-05), and the Northwest University Graduate Innovation Project (No. CX2023099).
Copyright information: © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license