Ultrathin Zincophilic Interphase Regulated Electric Double Layer Enabling Highly Stable Aqueous Zinc‑Ion BatteriesOACSTPCDEI
The practical application of aqueous zinc-ion batteries for large-grid scale systems is still hindered by uncontrolled zinc dendrite and side reactions.Regulating the elec-trical double layer via the electrode/electrolyte interface layer is an effective strategy to improve the stability of Zn anodes.Herein,we report an ultrathin zincophilic ZnS layer as a model regu-lator.At a given cycling current,the cell with Zn@ZnS electrode displays a lower potential drop over the Helmholtz layer(stern layer)and a suppressed diffuse layer,indicating the regulated charge distribution and decreased electric double layer repulsion force.Boosted zinc adsorption sites are also expected as proved by the enhanced electric double-layer capacitance.Consequently,the symmetric cell with the ZnS protection layer can stably cycle for around 3,000 h at 1 mA cm^(-2) with a lower overpotential of 25 mV.When coupled with an I2/AC cathode,the cell demonstrates a high rate performance of 160 mAh g^(-1) at 0.1 A g^(-1) and long cycling stability of over 10,000 cycles at 10 A g^(-1).The ZnMnO_(2) also sustains both high capacity and long cycling stability of 130 mAh g^(-1) after 1,200 cycles at 0.5 A g^(-1).
Yimei Chen;Zhiping Deng;Yongxiang Sun;Yue Li;Hao Zhang;Ge Li;Hongbo Zeng;Xiaolei Wang;
Department of Chemical and Materials Engineering,University of Alberta,9211‑116 Street NW,Edmonton,AB T6G 1H9,CanadaDepartment of Mechanical Engineering,University of Alberta,9211‑116 Street NW,Edmonton,AB T6G 1H9,Canada
动力与电气工程
Zinc anodeElectric double-layer regulationMultifunction SEI layerInhibited side reactions and dendriteRapid kinetics
《Nano-Micro Letters》 2024 (005)
P.285-299 / 15
This work was financially supported by the Natural Sciences and Engineering Research Council of Canada(NSERC),through the Discovery Grant Program(RGPIN-2018-06725);the Discovery Accelerator Supplement Grant program(RGPAS-2018-522651);by the New Frontiers in Research Fund-Exploration program(NFRFE-2019-00488);This research was supported by funding from the Canada First Research Excellence Fund as part of the University of Alberta’s Future Energy Systems research initiative(FES-T06-Q03);Prof.Hao Zhang,Prof.Hongbo Zeng,and Prof.Xiaolei Wang acknowledge the support of nanoFAB in sample preparation and Electron Microscopy at the University of Alberta in Canada;Yimei Chen is supported by the Chinese Scholarship Council(CSC)(Grant No.202006450027).
评论