Affiliation:
1. School of Materials Science and Engineering Ocean University of China Qingdao 266404 China
2. Materials Science and Engineering Program Texas Materials Institute The University of Texas at Austin Austin Texas 78712 USA
Abstract
AbstractAqueous Zn metal batteries are promising candidates for large‐scale energy storage due to their intrinsic advantages. However, Zn tends to deposit irregularly and forms dendrites driven by the uneven space electric field distribution near the Zn‐electrolyte interphase. Herein it is demonstrated that trace addition of Co single atom anchored carbon (denoted as CoSA/C) in the electrolyte regulates the microspace electric field at the Zn‐electrolyte interphase and unifies Zn deposition. Through preferential adsorption of CoSA/C on the Zn surface, the atomically dispersed Co‐N3 with strong charge polarization effect can redistribute the local space electric field and regulate ion flux. Moreover, the dynamic adsorption/desorption of CoSA/C upon plating/stripping offers sustainable long‐term regulation. Therefore, Zn||Zn symmetric cells with CoSA/C electrolyte additive deliver stable cycling up to 1600 h (corresponding to a cumulative plated capacity of 8 Ah cm−2) at a high current density of 10 mA cm−2, demonstrating the sustainable feature of microspace electric field regulation at high current density and capacity.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Welch Foundation
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
21 articles.
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