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In-Situ Integration of a Hydrophobic and Fast-Zn2+-Conductive Inorganic Interphase to Stabilize Zn Metal Anodes |
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| Authors: | Mengyu Liu Wentao Yuan Dr Guoqiang Ma Kaiyue Qiu Dr Xueyu Nie Prof Yongchang Liu Prof Shigang Shen Prof Ning Zhang |
| Institution: | 1. College of Chemistry and Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, 071002 P. R. China
These authors contributed equally to this work. Contribution: Conceptualization (equal), Data curation (lead), Formal analysis (lead), ?Investigation (lead), Methodology (equal), Writing - original draft (equal);2. College of Chemistry and Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, 071002 P. R. China These authors contributed equally to this work. Contribution: Data curation (equal), Formal analysis (equal), ?Investigation (equal), Methodology (equal), Software (lead), Validation (equal);3. College of Chemistry and Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, 071002 P. R. China Contribution: Formal analysis (equal), Validation (equal);4. College of Chemistry and Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, 071002 P. R. China Contribution: Formal analysis (equal);5. Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083 P. R. China;6. College of Chemistry and Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, 071002 P. R. China Contribution: Formal analysis (equal), Resources (equal), Supervision (supporting);7. College of Chemistry and Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, 071002 P. R. China |
| 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. |
| Keywords: | Aqueous Zn Battery Hydrophobic Interphase Inorganic Interphase Zinc Hexacyanoferrate Zn Metal Anode |