Based On Chip-type MnO₂ Ordered Nanowires Zinc-ion Battery

Increasing energy consumption has stimulated the development of energy storage devices.Among them,zinc-ion batteries have attracted widespread attention due to their good reliability,low cost,high energy/power density,and environmental friendliness.However,the poor cycling performance of zinc-ion batteries severely restricts its widespread application.Therefore,a large amount of research has been devoted to improving the performance of water-based zinc-ion batteries,but the intrinsic mechanism of capacity attenuation of water-based zinc-ion batteries is still unclear.Rechargeable zinc ion batteries show good application prospects in the field of secondary energy storage.However,the mechanism is not clear,and fast capacity decay is a major problem in the field of electrochemical energy storage devices such as water-based zinc ion batteries.Traditional button-type batteries usually use ex-situ characterization technology in the characterization process,and during the preparation of electrochemical energy storage devices.The introduction of carbon black and other conductive agents and binders cannot explain the intrinsic mechanism of battery capacity degradation.In this paper,a series of microfabrication processes were used to successfully produce a chip-type zinc-ion battery based on Langmuir-Blodgett nanowire（LBNW）thin films.The electrochemical performance has been systematically studied.The main research contents and results are as follows:With an interdigital device configuration,a splendid Ohmic contact between MnO₂ LBNWs and pyrolytic carbon current collector is demonstrated here,enabling a small polarization voltage.In addition,this work reveals,for the first time,that the conductance of MnO₂ LBNWs monotonically increases/decreases when the ZIBs are charged/discharged.Multistep phase transition is mainly responsible for the mechanism of the ZIBs,as evidenced by combined high resolution transmission electron microscopy and in situ Raman spectroscopy.This work provides a new and adaptable platform for microchip-based in situ simultaneous electrochemical and physical detection of batteries,which would promote the fundamental and practical research of nanowire electrode materials in energy storage applications.