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Cai, Zhao; Wang, Jindi; Lu, Ziheng; Zhan, Renming; Ou, Yangtao; Wang, Li; Dahbi, Mouad; Alami, Jones; Lu, Jun; Amine, Khalil; Sun, Yongming
Angewandte Chemie, March 28, 2022, Letnik: 61, Številka: 14Journal Article
Metallic Zn is a preferred anode material for rechargeable aqueous batteries towards a smart grid and renewable energy storage. Understanding how the metal nucleates and grows at the aqueous Zn anode is a critical and challenging step to achieve full reversibility of Zn battery chemistry, especially under fast‐charging conditions. Here, by combining in situ optical imaging and theoretical modeling, we uncover the critical parameters governing the electrodeposition stability of the metallic Zn electrode, that is, the competition among crystallographic thermodynamics, kinetics, and Zn2+‐ion diffusion. Moreover, steady‐state Zn metal plating/stripping with Coulombic efficiency above 99 % is achieved at 10–100 mA cm−2 in a reasonably high concentration (3 M) ZnSO4 electrolyte. Significantly, a long‐term cycling‐stable Zn metal electrode is realized with a depth of discharge of 66.7 % under 50 mA cm−2 in both Zn||Zn symmetrical cells and MnO2||Zn full cells. Ultrafast metal electrodeposition in fast‐charging Zn batteries was investigated by in situ optical imaging and theoretical modeling. The critical parameters governing the electrodeposition stability of the metallic Zn electrode were uncovered, guided by which a highly reversible Zn metal electrode in an aqueous battery with a depth of discharge of 66.7 % at 50 mA cm−2 was achieved.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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