沉淀法制备草酸镍及其电化学储能性能  

Electrochemical Energy Storage Performance of Nickel Oxalate Prepared by Precipitation Method

作　　者：金灵华 杨惠媛 陈小洁 王伟科 李健 张也 JIN Linghua;YANG Huiyuan;CHEN Xiaojie;WANG Weike;LI Jian;ZHANG Ye(School of Chemistry and Chemical Engineering,University of South China,Hengyang 421001,Hunan,China;Nanchang Institute of Technology,Nanchang 330044,Jiangxi,China;School of Physics and Electronics,Hunan Normal University,Changsha 410081,China)

机构地区：[1]南华大学化学化工学院,湖南衡阳421001 [2]南昌理工学院,南昌330044 [3]湖南师范大学物理与电子科学学院,长沙410081

出　　处：《硅酸盐学报》2022年第11期2917-2923,共7页Journal of The Chinese Ceramic Society

基　　金：湖南省自然科学基金青年基金(2021JJ40446);湖南省大学生创新创业训练计划(S202110555129)。

摘　　要：开发具有优异电化学性能的阴极材料对混合超级电容器的应用至关重要。通过沉淀法成功合成了NiC_(2)O_(4)·2H_(2)O阴极材料,并对其微观结构、形貌及其电化学性能进行研究。结果表明:NiC_(2)O_(4)·2H_(2)O呈现出尺寸约0.5~2.0μm独特多面体颗粒结构,且每个颗粒由多晶所组成的,在1 A/g的电流密度下可实现1096.2 F/g的高比容量。组装后的草酸镍//活性炭混合超级电容器在3.7 k W/kg的高功率密度下,仍保持10.2 Wh/kg的能量密度。将两个混合器件串联可以点亮绿色和黄色发光二极管。NiC_(2)O_(4)·2H_(2)O作为一种新型、成本低廉、环境友好型阴极材料在电化学储能中具有潜在的应用前景。The development of cathode materials with excellent electrochemical properties is crucial for the application of hybrid supercapacitors.NiC_(2)O_(4)·2H_(2)O cathode material was synthesized by a precipitation method,and its microstructure,morphology and electrochemical performance were investigated.The results show that NiC_(2)O_(4)·2H_(2)O exhibits a unique polyhedral particle structure,the particle sizes are 0.5-2.0μm,and each particle is composed of polycrystals,thus achieving a high specific capacity of 1096.2 F/g at a current density of 1 A/g.The assembled nickel oxalate//activated carbon hybrid supercapacitor still maintains an energy density of10.2 Wh/kg at a high power density of 3.7 k W/kg.Connecting two hybrid devices in series can light up green and yellow LEDs.This demonstrates that NiC_(2)O_(4)·2H_(2)O has potential application prospects in electrochemical energy storage as a novel,low-cost and environmentally friendly cathode material.

关 键 词：草酸镍 沉淀法 电极材料 混合超级电容器 

分 类 号：O646[理学—物理化学] TM53[理学—化学]