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Title: Boosting Zn-ion storage performance of bronze-type VO2 via Ni-mediated electronic structure engineering
Authors: Cai, Yi
Chua, Rodney
Kou, Zongkui
Ren, Hao
Yuan, Du
Huang, Shaozhuan
Kumar, Sonal
Verma, Vivek
Amonpattaratkit, Penphitcha
Srinivasan, Madhavi
Keywords: Engineering::Materials
Issue Date: 2020
Source: Cai, Y., Chua, R., Kou, Z., Ren, H., Yuan, D., Huang, S., Kumar, S., Verma, V., Amonpattaratkit, P. & Srinivasan, M. (2020). Boosting Zn-ion storage performance of bronze-type VO2 via Ni-mediated electronic structure engineering. ACS Applied Materials & Interfaces, 12(32), 36110-36118.
Project: NRFI2017-08/NRF2016NRF-NRFI001-22
Journal: ACS Applied Materials & Interfaces 
Abstract: Aqueous rechargeable zinc-ion batteries are emerging as attractive alternatives for post-lithium-ion batteries. However, their electrochemical performances are restricted by the narrow working window of materials in aqueous electrolytes. Herein, a Ni-mediated VO2–B nanobelt [(Ni)VO2] has been designed to optimize the intrinsic electronic structure of VO2–B and thus achieve much more enhanced zinc-ion storage. Specifically, the Zn/(Ni)VO2 battery yields a good rate capability (182.0 mA h g–1 at 5 A g–1) with a superior cycling stability (130.6 mA h g–1 at 10 A g–1 after 2000 cycles). Experimental and theoretical methods reveal that the introduction of Ni2+ in the VO2 tunnel structure can effectively provide high surface reactivity and improve the intrinsic electronic configurations, thus resulting in good kinetics. Furthermore, H+ and Zn2+ cointercalation processes are determined via in situ X-ray diffraction and supported by ex situ characterizations. Additionally, quasi-solid-state Zn/(Ni)VO2 soft-packaged batteries are assembled and provide flexibility in battery design for practical applications. The results provide insights into the interrelationships between the intrinsic electronic structure of the cathode and the overall electrochemical performance.
ISSN: 1944-8244
DOI: 10.1021/acsami.0c09061
Schools: School of Materials Science and Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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