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In‐Situ Integration of a Hydrophobic and Fast‐Zn2+‐Conductive Inorganic Interphase to Stabilize Zn Metal Anodes

In‐Situ Integration of a Hydrophobic and Fast‐Zn2+‐Conductive Inorganic Interphase to Stabilize... The irreversible issues of Zn anode stemming from dendrite growth and water‐induced erosion have severely hindered the commercialization of rechargeable aqueous Zn batteries. Herein, a hydrophobic and fast‐Zn2+‐conductive zinc hexacyanoferrate (HB‐ZnHCF) interphase layer is in situ integrated on Zn by a rapid room‐temperature wet‐chemistry method to address these dilemmas. Different from currently proposed hydrophilic inorganic cases, the hydrophobic and compact HB‐ZnHCF interphase effectively prevents the access of water molecules to Zn surface, thus avoiding H2 evolution and Zn corrosion. Moreover, the HB‐ZnHCF with large internal ion channels, strong zincophilicity, and high Zn2+ transference number (0.86) permits fast Zn2+ transport and enables smooth Zn deposition. Remarkably, the resultant HB‐ZnHCF@Zn electrode delivers unprecedented reversibility with 99.88 % Coulombic efficiency over 3000 cycles, realizes long‐term cycling over 5800 h (>8 months, 1 mA cm−2) and 1000 h (10 mA cm−2), and assures the stable operation of full Zn battery with both coin‐ and pouch‐type configurations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Angewandte Chemie International Edition Wiley

In‐Situ Integration of a Hydrophobic and Fast‐Zn2+‐Conductive Inorganic Interphase to Stabilize Zn Metal Anodes

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Publisher
Wiley
Copyright
© 2023 Wiley‐VCH GmbH
ISSN
1433-7851
eISSN
1521-3773
DOI
10.1002/anie.202304444
Publisher site
See Article on Publisher Site

Abstract

The irreversible issues of Zn anode stemming from dendrite growth and water‐induced erosion have severely hindered the commercialization of rechargeable aqueous Zn batteries. Herein, a hydrophobic and fast‐Zn2+‐conductive zinc hexacyanoferrate (HB‐ZnHCF) interphase layer is in situ integrated on Zn by a rapid room‐temperature wet‐chemistry method to address these dilemmas. Different from currently proposed hydrophilic inorganic cases, the hydrophobic and compact HB‐ZnHCF interphase effectively prevents the access of water molecules to Zn surface, thus avoiding H2 evolution and Zn corrosion. Moreover, the HB‐ZnHCF with large internal ion channels, strong zincophilicity, and high Zn2+ transference number (0.86) permits fast Zn2+ transport and enables smooth Zn deposition. Remarkably, the resultant HB‐ZnHCF@Zn electrode delivers unprecedented reversibility with 99.88 % Coulombic efficiency over 3000 cycles, realizes long‐term cycling over 5800 h (>8 months, 1 mA cm−2) and 1000 h (10 mA cm−2), and assures the stable operation of full Zn battery with both coin‐ and pouch‐type configurations.

Journal

Angewandte Chemie International EditionWiley

Published: Jul 3, 2023

Keywords: Aqueous Zn Battery; Hydrophobic Interphase; Inorganic Interphase; Zinc Hexacyanoferrate; Zn Metal Anode

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