Highly Reversible and Rechargeable Safe Zn Batteries Based on a Triethyl Phosphate Electrolyte

Ahmad Naveed; Huijun Yang; Jun Yang; Yanna Nuli; Jiulin Wang

doi:10.1002/anie.201813223

Highly Reversible and Rechargeable Safe Zn Batteries Based on a Triethyl Phosphate Electrolyte

Angew Chem Int Ed Engl. 2019 Feb 25;58(9):2760-2764. doi: 10.1002/anie.201813223. Epub 2019 Jan 25.

Authors

Ahmad Naveed¹, Huijun Yang¹, Jun Yang¹, Yanna Nuli¹, Jiulin Wang¹

Affiliation

¹ Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.

PMID: 30604584
DOI: 10.1002/anie.201813223

Abstract

Zinc metal is an attractive anode material for next-generation batteries. However, dendrite growth and limited Coulombic efficiency (CE) during cycling are the major roadblocks towards the widespread commercialization of batteries employing Zn anodes. In this work we report the novel adoption of triethyl phosphate (TEP) as a solvent and co-solvent with aqueous electrolytes to obtain a highly stable and dendrite-free Zn anode. Stable Zn plating/stripping for over 3000 h was obtained, accompanied by a CE of 99.68 %. SEM images of the Zn anodes revealed highly porous interconnected dendrite-free Zn deposits. The electrolyte displayed good compatibility with both Zn anodes and potassium copper hexacyanoferrate (KCuHCf) cathodes for Zn ion batteries (ZIBs). The full cell showed a long cycling stability and high rate capability. The present work is a contribution towards cost-effective and safe battery systems.

Keywords: Coulombic efficiency; Zn ion battery; battery safety; dendrite-free Zn anodes; triethyl phosphate.

Abstract

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