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Reversible Zn Metal Anodes Enabled by Trace Amounts of Underpotential Deposition Initiators

Published version
Peer-reviewed

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Authors

Dai, Yuhang 
Zhang, Chengyi 
Zhang, Wei 
Cui, Lianmeng 
Ye, Chumei 

Abstract

jats:titleAbstract</jats:title>jats:pRoutine electrolyte additives are not effective enough for uniform zinc (Zn) deposition, because they are hard to proactively guide atomic‐level Zn deposition. Here, based on underpotential deposition (UPD), we propose an “escort effect” of electrolyte additives for uniform Zn deposition at the atomic level. With nickel ion (Nijats:sup2+</jats:sup>) additives, we found that metallic Ni deposits preferentially and triggers the UPD of Zn on Ni. This facilitates firm nucleation and uniform growth of Zn while suppressing side reactions. Besides, Ni dissolves back into the electrolyte after Zn stripping with no influence on interfacial charge transfer resistance. Consequently, the optimized cell operates for over 900 h at 1 mA cmjats:sup−2</jats:sup> (more than 4 times longer than the blank one). Moreover, the universality of “escort effect” is identified by using Crjats:sup3+</jats:sup> and Cojats:sup2+</jats:sup> additives. This work would inspire a wide range of atomic‐level principles by controlling interfacial electrochemistry for various metal batteries.</jats:p>

Description

Keywords

40 Engineering, 4016 Materials Engineering, 34 Chemical Sciences, 3406 Physical Chemistry

Journal Title

Angewandte Chemie

Conference Name

Journal ISSN

0044-8249
1521-3757

Volume Title

Publisher

Wiley
Sponsorship
Engineering and Physical Sciences Research Council (EP/V027433/1)