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Updated: May 13, 2025

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Sulfhydryl and Sulfonic Acid Bifunctional Group Achieving (101) Crystal Preferential Reversible Zn2+
Kaixi Yan1, Yani Guo1, Anuj Kumar2
1National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology, Beijing, 100029, China.
Abstract:
Disordered electrodeposition of Zn2+ resulted in serious dendrite and hydrogen evolution reactions, greatly decreasing the energy efficiency and durability of aqueous zinc ion batteries (AZIBs). Herein, sodium 2-mercaptoethanesulfonate (MSN) is proposed as a new additive to achieve induced directional electrodeposition of Zn2+ on the Zn (101) crystal surface to form a dense uniform Zn metal layer via the cooperative effect of sulfhydryl and sulfonic acid groups. Different from the reported additives, MSN molecules promote the rapid formation of the Zn2+ adsorption layer, which greatly accelerates its directed migration rate and orderly nucleation process, achieving eliminated zinc dendrites and nucleation overpotential, far superior to the reported additives. The MSN-introduced Zn||Zn symmetric battery displays amazing durability and is stably cycled for more than 3500 h at 2 mA cm-2 @ 2 mAh cm-2, and over 1 000 h even under harsh conditions (5 mA cm-2 @ 5 mAh cm-2). Furthermore, the Zn||δ-MnO2 coin battery offers a high capacity of 201.5 mAh g-1 and a low recession rate of 1% during 800 cycles at 1 A g-1, far higher than that of the blank sample (121.3 mAh g-1, 56.1%), respectively, fully demonstrating the extraordinary advantages and contributions of the new MSN molecules.
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