Highly Reversible Zn Metal Anodes Realized by Synergistically Enhancing Ion Migration Kinetics and Regulating Surface Energy

Yang Wang; Zheng Deng; Bin LuoGuosheng DuanSinan ZhengLeilei SunZhizhen YeJianguo LuJingyun HuangYingying Lu

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Highly Reversible Zn Metal Anodes Realized by Synergistically Enhancing Ion Migration Kinetics and Regulating Surface Energy

机译：Highly Reversible Zn Metal Anodes Realized by Synergistically Enhancing Ion Migration Kinetics and Regulating Surface Energy

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The Zn metal anode suffers from uncontrollable dendrite formation andintricate parasitic reactions that dramatically impede the commercializationof aqueous Zn metal batteries (AZMBs). This st proposes synergistic strategiesfor facilitating Zn2+ migration kinetics and regulating surface energyto achieve dendrite-free Zn deposition and suppressing self-corrosion bycovering Zn anode with multifunctional covalent organic frameworks possessingsulfonate-rich (-SO_3H) covalently-tethered nanochannels (SCOFs).Benefiting from the vital interplay between -SO_3H and Zn~（2+）, the SCOFscoatings form ample Zn~（2+） accelerated transport channels to extract Zn~（2+） fromthe electrolyte quickly, thereby promoting rapid desolvation of hydrated Zn~（2+）,enhancing ion replenishment capability, and guaranteeing a steady streamof Zn2+ flux for endowing uniform and compact nucleation. Additionally, thezincophilic SCOFs significantly reduce the surface energy of the Zn (002)crystal plane, inducing preferentially crystallographic (002) orientation electroplatinggrowth. Consequently, the SCOFs-coated Zn anodes (SCOFs@Zn)demonstrate an excellent lifespan up to 4000 h at 5 mA cm~(?2), 1 mAh cm~(?2),and 3000 h at 5 mA cm~(?2), 2 mAh cm~(?2). Meanwhile, the full cell paired withthe MnO_2 cathode sustains remarkable reversibility within 1000 cycles. Thesynergistic approach to manipulating ion migration and surface energy providesnew insights into developing highly stable AZMBs.

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来源
《Advanced functional materials》 |2022年第51期|2209028.1-2209028.12|共12页
作者
Yang Wang; Zheng Deng; Bin LuoGuosheng DuanSinan ZhengLeilei SunZhizhen YeJianguo LuJingyun HuangYingying Lu;
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作者单位

State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027, P. R. China;

Institute of WenzhouZhejiang UniversityWenzhou 325006, P. R. China;

Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou 215123, P. R. China;

State Key Laboratory of Chemical EngineeringZhejiang UniversityHangzhou 310027, P. R. China;

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dendrite-free; migration kinetics; surface energies; Zn anodes; Zn metal batteries;

Highly Reversible Zn Metal Anodes Realized by Synergistically Enhancing Ion Migration Kinetics and Regulating Surface Energy

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