Na^(+)掺杂V_(2)O_(5)电极材料的制备及其储锌性能

Preparation and Zinc Storage Properties of Na^(+)-Doped V_(2)O_(5) Electrode Materials

针对V_(2)O_(5)电子传输慢、离子扩散受阻以及循环性能不稳定等问题,通过一步水热法制备Na_(0.4)V_(2)O_(5)纳米粉体材料,并作为锌离子电池正极材料。结果表明,Na_(0.4)V_(2)O_(5)电极的倍率性能和循环稳定性均优于V_(2)O_(5)电极。Na^(+)掺杂通过改变V_(2)O_(5)的层状结构,改善V_(2)O_(5)的电子传输和离子扩散,从而提高电极电导特性和结构稳定性。Na_(0.4)V_(2)O_(5)电极是倍率性能和循环稳定性优良的电极材料。

In order to solve the problems such as sluggish electron transfer,severe concentration polarization and poor cycling performance of V_(2)O_(5),Na_(0.4)V_(2)O_(5) nano-powder materials was prepared by one-step hydrothermal method and used as cathode material of zinc-ion battery.The results reveal that the rate performance and cycle stability of Na_(0.4)V_(2)O_(5) electrode are better than those of V_(2)O_(5) electrode.Na^(+)-doped can change the layered structure of V_(2)O_(5) and effectively improve the electron transport and ion diffusion in the solid electrode.Thus,Na_(0.4)V_(2)O_(5) improves the conductivity characteristics and structural stability and is a promising electrode material with excellent rate performance and cycle stability.