桂林电子科技大学学报Issue(5)：475-481,7.DOI:10.16725/j.1673-808X.202312
基于Zn掺杂α-MnO2的NH4+混合电容器及其电化学性能研究
Research on Zn doping α-MnO2 of NH4+hybrid capacitor and its electrochemical performance
摘要
Abstract
The electrode materials of NH4 hybrid capacitors are easily dissolved in acidic electrolyte,which leads to the collapse of bulk structure of the material,and excessively rapid capacity decay,thus limiting the extensive application of NH4 hybrid capaci-tors.The tunnel structured ZnxMnO2 materials are prepared through one step hydrothermal method,which are characterized by XRD,SEM,FTIR,and XPS for ZnxMnO2 cathode.Electrochemical performance test of ZnxMnO2 materials shows the capacity of ZnMnO2 material can achieve 350 F/g upon stabilization with current density of 0.5 A/g.A novel ammonium ion hybrid supercapacitor(A-HSC)is constructed with tunneling ZnxMnO2 as the cathode material and commercial activated carbon as the negative electrode;The capacitor has a high voltage window which can work stably within in the voltage window of 0-1.6 V and provides energy density of 86 Wh/kg.The excellent cycling stability with 80％capacity remains after 5 000 cycles at a current density of 5 A/g.The hybrid ca-pacitor proves that ZnxMnO2 is a promising NH4+storage electrode material,which is significant for the construction of a new gener-ation of aqueous ammonium ion capacitors.关键词
铵离子/正极材料/隧道结构/水系储能/Zn2+掺杂Key words
ammonium ion/positive material/tunnel structure/aqueous system energy storage/Zn2+doping分类
能源科技引用本文复制引用
岳圆圆,颜东亮..基于Zn掺杂α-MnO2的NH4+混合电容器及其电化学性能研究[J].桂林电子科技大学学报,2024,(5):475-481,7.基金项目
国家自然科学基金(51974098,52264034) （51974098,52264034）
广西自然科学基金(2020GXNSFAA159037) （2020GXNSFAA159037）
