首页|Achieving an ion-homogenizing and corrosion-resisting interface through nitro-coordination chemistry for stable zinc metal anodes
Achieving an ion-homogenizing and corrosion-resisting interface through nitro-coordination chemistry for stable zinc metal anodes
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Suppression of uncontrollable dendrite growth and water-induced side reactions of Zn metal anodes is crucial for achieving long-lasting cycling stability and facilitating the practical implementations of aque-ous Zn-metal batteries.To address these challenges,we report in this study a functional nitro-cellulose interfacial layer(NCIL)on the surface of Zn anodes enlightened by a nitro-coordination chemistry strat-egy.The NCIL exhibits strong zincophilicity and superior coordination capability with Zn2+due to the highly electronegative and highly nucleophilic nature of the nitro functional group.This characteristic facilitates a rapid Zn-ion desolvation process and homogeneous Zn plating,effectively preventing H2 evo-lution and dendrite formation.Additionally,the negatively charged surface of NCIL acts as a shield,repel-ling SO42-anions and inhibiting corrosive reactions on the Zn surface.Remarkably,reversible and stable Zn plating/stripping is achieved for over 5100 h at a current density of 1 mA cm-2,which is nearly 30 times longer than that of bare Zn anodes.Furthermore,the Zn//V2O5 full cells with the functional inter-face layer deliver a high-capacity retention of 80.3％for over 10,000 cycles at 5 A g-1.This research offers valuable insights for the rational development of advanced protective interface layers in order to achieve ultra-long-life Zn metal batteries.
Zinc metal anodeNitro-cellulose interfacial layerCoordination capabilityDendrite-free depositionLong-term cycling
School of Light Industry Science and Engineering,State Key Laboratory of Biobased Fiber Manufacturing Technology,Tianjin Key Laboratory of Pulp and Paper,China Light Industry Key Laboratory of Papermaking and Biorefinery,Tianjin University of Science & Technology,Tianjin 300457,China
Department of Materials Science and Engineering,& Center of Super-Diamond and Advanced Films,City University of Hong Kong,83 Tat Chee Avenue,Hong Kong 999077,China
School of Chemical Engineering and Advanced Materials,The University of Adelaide,Adelaide,SA 5005,Australia
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGeneral Research Fund of Hong KongTianjin Research Innovation Project for Postgraduate Students
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