What is it about?
Our review focuses on the operational mechanism of electrolyte additives on the surface/interface chemistry of metallic Zn anode for the blooming aqueous Zn metal batteries (ZMBs). It systematically summarizes the effects of electrolyte additives on the physicochemical properties of electrolytes, and the electrolyte-zinc interface that influences the electric double layer structure, formation mechanism of solid-electrolyte interface (SEI) and texture formation of Zn.
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Why is it important?
ZMB is facing its critical challenge on the reversibility of Zn anode. Serving as one of the main strategies in electrolyte regulation, electrolyte additives enable reshaping the solvation structure of electrolyte and further regulating the surface reaction on Zn. This hinders the Zn dendrite growth and water-induced side reactions. So far, there is only a few emphasizing on the operational mechanism of electrolyte additives for the aqueous electrolytes in ZMB. It is therefore indispensable to point out its essence here.
Perspectives
The development of electrolyte system paves way on advancing ZMBs. The fundamentals need to be addressed: (1) the universal relationship between the optimal concentration of additives and physiochemical properties of electrolyte ; (2) the formation mechanism of SEI by additives ; (3) the relation between additives and Zn (002) texture; (4) the effects of additives on cathode materials. And the following aspects are noteworthy, synthesis of new zinc slat for ZMB electrolyte, fundamentals on the evolving intrinsic of electrolytes, and theoretical study to build the model for electrolyte-Zn interface.
Du Yuan
Read the Original
This page is a summary of: Roles of electrolyte additive in Zn chemistry, Nano Research, May 2023, Tsinghua University Press,
DOI: 10.1007/s12274-023-5637-7.
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