Nitrogen doped carbon nanowires loaded with MnO nanoparticles as cathode for aqueous zinc-ion batteries
Aqueous zinc-ion batteries(AZIBs)hold great promise for various applications due to the low redox potential of zinc and high energy density.The host cathode for storing Zn2+determines the discharge perform-ance and cycling stability of the battery.Herein,three one-dimensional nanowire structured polymers were pre-pared using nitrilotriacetic acid(NTA)as a ligand with three carboxyl groups,and three nitrogen-doped carbon nanowires loaded with different particle size MnO materials(MnO/NC-x)were obtained after calcination treat-ment.Among them,the MnO particles in MnO/NC-0.5 prepared with a Mn2+:NTA ratio of 0.5 had the smal-lest size and were uniformly dispersed on the nanowire surface.This material exhibited excellent kinetic proper-ties such as ion diffusion and conductivity as the cathode for AZIBs.It delivered a rate capability of 158 mAh/g at a high current density of 2 A/g and still maintained a capacity retention of 96％after 1000 cycles at 1 A/g,demonstrating excellent cycling stability.
aqueous zinc ion batteriescathode materialmanganese protoxideN-doped carbon nanowire
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