Abstract
Aqueous zinc-ion batteries have attracted much attention due to their high theoretical capacity,low cost,high safety,and eco-friendly.However,challenges such as dendrite growth and side reactions severely hinder the electrochemical performance of the Zn anode,leading to low Coulombic efficiency(CE)or even short circuits.Herein,phenolic resin(PF)is used as a protective coating on the surface of the zinc metal electrode.The PF layer can greatly improve the corrosion resistance of the Zn electrode in the electrolyte.Importantly,this artificial elec-trode/electrolyte interphase also elevates the nucleation barrier and restrains Zn2+2D diffusion,regulating the zinc deposition/dissolution behavior.As a result,PF@Zn sym-metric cells exhibit superior performance than that of bare Zn symmetric cells,achieving a stable and dendrite-free cycle of 1400 h.Furthermore,the carbon nanotube/MnO2‖PF@Zn(CNT/MnO2‖PF@Zn)full cell also delivers a long cycle life with a high-capacity retention of about 180.0 mAh·g-1 after 1400 cycles,far exceeding that of bare Zn anode.This work provides a facile strategy for achieving a dendrite-free and rechargeable zinc anode.
基金项目
National Natural Science Foundation of China(52201248)
Science and Technology Rising Star Project of Hebei University of Technology(JBKYXX2201)
NETL
NSTL
万方数据