pH modulation and molecular layer construction for stable zinc batteries  

作　　者：Donghong Wang Qiwang Shao Xianjia Cao Mengxuan Qin Yizhu He Lei Zhu Qing Li Dongming Liu 

机构地区：[1]School of Materials Science and Engineering,Anhui Province Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen&Electricity,Anhui University of Technology,Ma'anshan 243032,Anhui,China [2]Anhui Key Lab of Metal Material and Processing,Ma'anshan 243002,Anhui,China [3]School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243032,Anhui,China [4]Institute of Applied Physics and Materials Engineering,University of Macao,Macao 99078,China

出　　处：《Journal of Energy Chemistry》2025年第3期179-188,共10页能源化学(英文版)

基　　金：supported by the open research fund of Songshan Lake Materials Laboratory(2023SLABFN18);the Anhui Provincial Natural Science Foundation(2308085QB46);the Scientific Research Foundation of Education Department of Anhui Province of China(2022AH010025,2023AH051109);the Key Research and Development Program of Anhui Province of China(2022l07020011);The open research fund of the Anhui Key Lab of Metal Material and Processing(RZ2200002901)。

摘　　要：Aqueous zinc-ion batteries(AZIBs)have regained interest due to their inherent safety and costeffectiveness.However,the zinc anode is notorious for side reactions and dendrite growth,which plague the practical application of AZIBs.Adjusting the interfacial pH to reduce the by-products has been proven to be effective in protecting the zinc anode.Nevertheless,the dynamic regulation of the inherently unstable zinc interface during prolonged cycling remains a significant challenge.Herein,zwitterionic N-tris(hydroxymethyl)methylglycine(TMG)integrated with negative-COO^(-)and positive NH_(2)^(+)groups is proposed to stabilize the Zn anode and extend the lifespan as a self-regulating interfacial additive.The anionic portion serves as a trapping site to balance the interfacial pH and thus mitigate the unintended side reactions.Simultaneously,the NH_(2)^(+)cations are anchored on the zinc surface,forming a water-shielding,zincophilic molecular layer that guides three-dimensional diffusion and promotes uniform electro-deposition.Thus,an average plating efficiency of 99.74%over 3300 cycles at a current density of2 mA cm^(-2)is achieved.Notably,the TMG additive actualizes ultralong life in Zn‖Zn symmetrical cells(5500 h,exceeding 229 days,1 mA cm^(-2)/1 mA h cm^(-2)),and enables the Zn‖I_(2)cells to reach capacity retention rate of 89.4%after 1000 cycles at 1 A g^(-1).

关 键 词：Aqueous zinc ion battery Zn dendrites pHDynamic regulation Molecular layer Zn-12 

分 类 号：TM911.41[电气工程—电力电子与电力传动]