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Title: High-mass loading V3O7·H2O nanoarray for Zn-ion battery : new synthesis and two-stage ion intercalation chemistry
Authors: Chen, Duo
Lu, Menjie
Wang, Boran
Cheng, Hongfei
Yang, Hang
Cai, Dong
Han, Wei
Fan, Hong Jin
Keywords: Engineering::Materials::Functional materials
Issue Date: 2021
Source: Chen, D., Lu, M., Wang, B., Cheng, H., Yang, H., Cai, D., Han, W. & Fan, H. J. (2021). High-mass loading V3O7·H2O nanoarray for Zn-ion battery : new synthesis and two-stage ion intercalation chemistry. Nano Energy, 83, 105835-.
Journal: Nano Energy
Abstract: Vanadium-based materials are promising cathode materials for aqueous rechargeable zinc-ion batteries (ZIBs). However, up to now, the detailed Zn ion intercalation mechanisms are still not fully clear. In this work, we first show a new facile synthesis approach for V3O7·H2O nanoarray cathode with large mass loadings (1.0–12 mg cm−2). An empirical model is proposed to assess the utilization ratio of active materials under different mass loadings. Then, through the combination of first-principles calculations and a series of ex-situ characterizations, we identify for the first time a two-step Zn2+ intercalation mechanism in V3O7·H2O. The stepwise and reversible intercalation process is manifested by different diffusion energy barriers and segmented electrochemical kinetics in various discharge depths. The nanoarray binder-free electrode is also applied in pouch cells which show high capacities than state-of-the-art ZIB pouch cells. This study may provide an elucidation for the disputed Zn2+ intercalation chemistry of vanadium-based cathodes in ZIBs as well as a guidance to the design of high-mass-loading battery materials.
ISSN: 2211-2855
DOI: 10.1016/j.nanoen.2021.105835
Rights: © 2021 Elsevier. All rights reserved. This paper was published in Nano Energy and is made available with permission of Elsevier.
Fulltext Permission: embargo_20230531
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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