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Reversible zn/polymer heterogeneous anode

Carbon Energy 2023年第6期5卷 82-91页

作者： Lingyun Xiong Hao Fu Kai Yang Ji Young Kim Ren Ren Joong Kee Lee Woochul Yang Guicheng Liu Department of Physics Dongguk UniversitySeoulRepublic of Korea School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijingChina Energy Storage Research Center Clean Energy InstituteKorea Institute of Science and Technology(KIST)Seongbuk‐guSeoulRepublic of Korea Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina

Commercialization of zn-metal anodes with low cost and high theoretical capacity is hindered by the poor reversibility caused by dendrites growth,side reactions,and the slow zn^(2+)-transport and reaction ***,a reversible heterogeneous electrode of zn-nanocrystallites/polyvinylphosphonic acrylamide(zn/PPAm)with fast electrochemical kinetics is designed for the first time:phosphonic acid groups with strong polarity and chelation effect ensure structural reversibility and stability of the threedimensional zn-storage-host PPAm network and the zn/PPAm hybrid;hydrophobic carbon chains suppress side reactions such as hydrogen evolution and corrosion;weak electron-donating amide groups constitute zn^(2+)-transport channels and promote“desolvation”and“solvation”effects of zn^(2+)by dragging the PPAm network on the zn-metal surface to compress/stretch during zn plating/stripping,respectively;and the heterostructure and zn nanocrystallites suppress dendrite growth and enhance electrochemical reactivity,***,the zn/PPAm electrode shows cycle reversibility of over 6000 h with a hysteresis voltage as low as 31 mV in symmetrical cells and excellent durability and flexibility in fiber-shaped batteries.

关键词： dendrite-free electrode process kinetics fiber-shaped battery reversible metal/polymer heterostructure zn-metal anode

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A Perspective:the Technical Barriers of zn metal Batteries

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Chemical Research in Chinese Universities 2020年第1期36卷 55-60页

作者： JI Xiulei JIANG Heng Department of Chemistry Oregon State UniversityCorvallisOregon 97331-4003United States

Energy storage will witness a leap of understanding of new battery *** the safety that cannot be compromised,new aqueous batteries may surface as the solutions to meet the immense market needs,where the growth of renewables is no longer limited by the lack of *** zn-metal batteries are intriguing candidates to deliver the desirable properties and exhibit competitive levelized energy ***,the fact that most commercial zn batteries are primary batteries states the difficulty of reversibility for the reactions of electrodes in such *** article will highlight the practical needs that guide the development of storage *** causes of irreversibility for both cathode and zinc metal anode are discussed,and the potential solutions for these challenges are *** metal batteries may one day address the storage needs,and there exists a vast potential to further improve the properties of reactions in this battery.

关键词： zn-metal battery Storage battery zn-metal anode Hydrogen evolution reaction

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