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Realizing High-power and High-capacity Zinc/sodium Metal Anodes Through Interfacial Chemistry Regulation

Overview
Journal Nat Commun
Specialty Biology
Date 2021 May 26
PMID 34035276
Citations 12
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Abstract

Stable plating/stripping of metal electrodes under high power and high capacity remains a great challenge. Tailoring the deposition behavior on the substrate could partly resolve dendrites' formation, but it usually works only under low current densities and limited capacities. Here we turn to regulate the separator's interfacial chemistry through tin coating with decent conductivity and excellent zincophilicity. The former homogenizes the electric field distribution for smooth zinc metal on the substrate, while the latter enables the concurrent zinc deposition on the separator with a face-to-face growth. Consequently, dendrite-free zinc morphologies and superior cycling stability are achieved at simultaneous high current densities and large cycling capacities (1000 h at 5 mA/cm for 5 mAh/cm and 500 h at 10 mA/cm for 10 mAh/cm). Furthermore, the concept could be readily extended to sodium metal anodes, demonstrating the interfacial chemistry regulation of separator is a promising route to circumvent the metal anode challenges.

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