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Monolithic Phosphate Interphase for Highly Reversible and Stable Zn Metal Anode |
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| Authors: | Dr Sailin Liu Dr Jitraporn |
| Institution: | 1. School of Chemical Engineering and Advanced Materials, the University of Adelaide, Adelaide, SA-5005 Australia;2. Australian Synchrotron, Australia's Nuclear Science and Technology Organisation, Clayton, VIC-3168 Australia;3. School of Chemical Engineering and Advanced Materials, the University of Adelaide, Adelaide, SA-5005 Australia
Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, the University of Wollongong, Wollongong, NSW-2500 Australia Department of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey, GU2 7XH UK |
| Abstract: | Zinc metal battery (ZMB) is promising as the next generation of energy storage system, but challenges relating to dendrites and corrosion of the zinc anode are restricting its practical application. Here, to stabilize Zn anode, we report a controlled electrolytic method for a monolithic solid-electrolyte interphase (SEI) via a high dipole moment solvent dimethyl methylphosphonate (DMMP). The DMMP-based electrolytes can generate a homogeneous and robust phosphate SEI (Zn3(PO4)2 and ZnP2O6). Benefiting from the protecting impact of this in situ monolithic SEI, the zinc electrode exhibits long-term cycling of 4700 h and a high Coulombic efficiency 99.89 % in Zn|Zn and Zn|Cu cell, respectively. The full V2O5|Zn battery with DMMP-H2O hybrid electrolyte exhibits a high capacity retention of 82.2 % following 4000 cycles under 5 A g−1. The first success in constructing the monolithic phosphate SEI will open a new avenue in electrolyte design for highly reversible and stable Zn metal anodes. |
| Keywords: | Fire Retardant Hybrid Electrolyte Phosphate Solvent Solid Electrolyte Interphase Zinc Ion Batteries |