Dual?Function Electrolyte Additive for Highly Reversible Zn Anode

نویسندگان

چکیده

Practical application of aqueous Zn-ion batteries (AZIBs) is significantly limited by poor reversibility the Zn anode. This because 1) dendrite growth, and 2) water-induced parasitic reactions including hydrogen evolution, during cycling. Here for first time an elegantly simple method reported that introduces ethylene diamine tetraacetic acid tetrasodium salt (Na4EDTA) to a ZnSO4 electrolyte. shown concomitantly suppress dendritic deposition H2 evolution. Findings confirm EDTA anions are adsorbed on surface dominate active sites generation inhibit water electrolysis. Additionally, promotes desolvation Zn(H2O)62+ removing H2O molecules from solvation sheath Zn2+. Side growth therefore suppressed using additive. A high with Coulombic efficiency (CE) 99.5% long lifespan 2500 cycles at 5 mAh cm?2, 2 cm?2 demonstrated. highly reversible electrode boosts overall performance VO2//Zn full-cells. These findings expected be immediate benefit range researchers in dual-function additives electrochemistry energy storage applications.

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ژورنال

عنوان ژورنال: Advanced Energy Materials

سال: 2021

ISSN: ['1614-6832', '1614-6840']

DOI: https://doi.org/10.1002/aenm.202102010