锌镍电池阴极材料制备及性能研究  

Preparation and Properties of Cathode Materials for Zinc-nickel Batteries

作　　者：黄延清 陈善华 李鸣 余海洲 孙小华 HUANG Yanqing;CHEN Shanhua;LI Ming;YU Haizhou;SUN Xiaohua(College of Materials&Chemical Engineering,China Three Gorges Univ.,Yichang 443002,China)

机构地区：[1]三峡大学材料与化工学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2022年第5期104-112,共9页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(21902084);湖北省自然科学基金(2020CFB677)。

摘　　要：水系二次锌镍电池作为一种新型电化学储能器件,它以放电电压平台高、环境友好、材料来源广泛,制备工艺简单等优点引起人们的广泛关注.但相对较低的能量密度和稳定性阻碍了其商业化的进程.如何提升锌镍电池的能量密度、功率密度以及稳定性成了目前研究的重点.在锌镍电池的阴极、阳极和电解液等重要组成单元中,阴极材料对电池的容量、稳定性都有显著影响.本文主要围绕电池阴极材料开展研究,利用两步水热工艺在泡沫镍上原位制备了三维片状结构的Ni_(3)Se_(2)/Ni_(3)S_(2)/Ni(OH)_(2).对比研究了Ni_(3)Se_(2)/Ni_(3)S_(2)/Ni(OH)_(2),Ni_(3)S_(2)/Ni(OH)_(2),NiSe-12h三种电极材料的电化学性能以及锌镍电池性能,发现Zn//[Ni_(3)Se_(2)/Ni_(3)S_(2)/Ni(OH)_(2)]电池拥有最高的容量(0.657mA·h/cm^(2))和循环稳定性(1300次循环后容量保持率81.7%).将镍基硫硒化物与氢氧化物原位叠层复合,充分发挥几种材料的协调作用和原位制备提升电极导电性的作用,有效增加了电池的面容量,改善了电池的循环稳定性.Water secondary zinc-nickel battery is a new type of electrochemical energy storage device.It has attracted wide attention because of its advantages such as high platform of discharge voltage,environmental friendliness,wide material source and simple preparation technology.However,its lower energy density and stability have hindered its commercialization.The focus of current research is how to improve the energy density,power density and stability of zinc-nickel batteries.The cathode material has a significant effect on the capacity and stability of the battery in the cathode,anode and electrolyte of zinc-nickel battery.In this paper,the cathode materials of battery are studied as follows:Ni_(3)Se_(2)/Ni_(3)S_(2)/Ni(OH)_(2) with three-dimensional flake-like structure is prepared in situ on nickel foam by two-step hydrothermal process.The electrochemical properties of Ni_(3)Se_(2)/Ni_(3)S_(2)/Ni(OH)_(2),Ni_(3)S_(2)/Ni(OH)_(2) and NiSe-12h electrode materials and the performance of Zinc-Ni battery are compared and studied.The cells Zn//[Ni_(3)Se_(2)/Ni_(3)S_(2)/Ni(OH)_(2)]are found to have the highest capacity(0.657 mA·h/cm^(2))and cycle stability(81.7%capacity retention rate after 1300 cycles).The in-situ lamination of nickel-based sulfide selenide and hydroxide gives full play to the coordination effect of several materials and the effect of in-situ preparation to enhance the conductivity of the electrode,which effectively increases the surface capacity of the battery and improves the cycle stability of the battery.

关 键 词：镍基硫硒化物 三维片状 能量稳定性 电池容量 锌镍电池 

分 类 号：TM911[电气工程—电力电子与电力传动]