Ni^(2+)预插层水合氧化钒的制备及水系锌离子电池的性能研究  

Preparation of Ni^(2+)pre-intercalated hydrated vanadium oxide and their performance research in aqueous zinc-ion batteries

作　　者：吴琼 王妍 张思琪[1] 曹健[1] 杨丽丽[1] 杨景海[1] WU Qiong;WANG Yan;ZHANG Si-qi;CAO Jian;YANG Li-li;YANG Jing-hai(College of Physics,Jilin Normal University,Siping 136000,China)

机构地区：[1]吉林师范大学物理学院,吉林四平136000

出　　处：《吉林师范大学学报(自然科学版)》2025年第1期31-37,共7页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(22075101);吉林省科技发展计划项目(YDZJ202301ZYTS253);吉林省教育厅科学研究项目(JJKH20230509KJ)。

摘　　要：水系锌离子电池(AZIBs)因其安全性好、无污染以及高理论容量等优点,被视为最有前景的未来可持续能源储存技术之一.在许多AZIBs电极候选材料里,具有可变晶格结构的层状钒氧材料以其优异的储能能力而备受关注,成为了当前研究的热点正极材料.然而,由于其小的层间距以及钒溶解现象所引起的缓慢电化学反应动力学和结构不稳定性,阻碍了其商业化的进程.本文采用简单的预嵌策略成功制备了Ni_(0.22)V_(2)O_(5)·0.94 H_(2)O(NiVO)材料,并将其作为正极材料应用于AZIBs.预插层的Ni^(2+)与H_(2)O在扩大层间距的同时也可以作为层间支柱,有效提升了Zn^(2+)的传输动力学与Zn^(2+)嵌入/脱出过程中的结构稳定性.结果显示,在0.2 A/g的电流密度下,展现出高可逆比容量(307.4 mA·h/g).材料的循环稳定性也较优异,即在2 A/g的大电流密度下,经过200次循环后,可逆比容量为206.3 mA·h/g.此研究为高性能钒基电极材料的设计与制备提供了一种简便可行的方案.Aqueous zinc-ion batteries(AZIBs)are one of the most promising sustainable energy storage technologies due to their safety,non-toxicity,and high theoretical capacity.Among the various AZIBs electrode materials,layered vanadium oxides are widely studied as cathode materials due to their advantages of adjustable crystal structure and high capacity.However,the slow electrochemical reaction kinetics and unstable layered structure caused by the small interlayer spacing and vanadium dissolution greatly hamper their commercialization progress.In this study,Ni_(0.22)V_(2)O_(5)·0.94 H_(2)O(NiVO)materials were successfully prepared using a simple preintercalated strategy and it was used as cathode material for AZIBs.The preintercalation Ni^(2+)and H_(2)O not only expands the interlayer spacing but also act as interlayer pillars,effectively improving the zinc ion transport kinetics and the structural stability of the zinc ion insertion/extraction process.The results show that a high reversible specific capacity(307.4 mA·h/g)can be obtained at the current density of 0.2 A/g.Meanwhile,it exhibits excellent cycling stability,with a reversible specific capacity of 206.3 mA·h/g after 200 cycles at a current density of 2 A/g.This study provides a simple and feasible approach for the design and preparation of high-performance vanadium-based electrode materials.

关 键 词：预插层 层状钒氧化物 水系锌离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]