摘要
普鲁士蓝由于其特殊的框架结构,具备作为储能电容电极材料的潜力。采用3种金属元素(即Co、Cu、Zn)取代Fe位点,调控结构和组成,合成单金属、双金属及三金属的类普鲁士蓝化合物(PBA)及其衍生物(PBAs)。基于材料的结构组成及微观形貌表征,表明所合成的材料具有规则的面心立方结构,且各金属元素分布均匀。在三电极体系中系统研究了3种金属元素取代普鲁士蓝的电化学性能。由于双金属Co-Zn PBA中2种金属化合物独立形核,可暴露更多活性位点,有效改善了赝电容储能性能。在1 A•g^(-1)电流密度下,比容量达到182 F•g^(-1),倍率性达到90.3%,2000次充放电循环后放电比容量几乎无衰减。
Prussian blue has the potential as an energy storage electrode material due to its special frame structure.In this paper,three different metal elements(Co,Cu,Zn)are used to replace the Fe atom site to control the structure and composition,and then the prussian blue analogue compounds(PBA)and their derivatives(PBAs)are synthesized.Based on the structural composition and microstructure morphology characterization,the synthesized materials have regular face-centered cubic structure,and the distribution of each metal element is uniform.The electrochemical performance of replacing prussian blue with three metal elements in a three-electrode system are systematically studied.Due to the double metal compounds of bimetal Co-Zn PBA grows and nucleates independently,more active sites can be exposed and the energy storage performance of pseudocapacitance can be effectively improved.The specific capacitance reaches 182 F•g^(-1)at the current density of 1 A•g^(-1),and the rate property reaches 90.3%.After 2000 charge-discharge cycles,the specific capacitance almost does not decay.This study has a certain guiding significance for the optimization of the preparation of Prussian blue electrode materials replaced by metal elements.
作者
杨欣尧
王盼盼
刘佳诚
胡兵兵
YANG Xinyao;WANG Panpan;LIU Jiacheng;HU Bingbing(School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074;Chongqing Key Laboratory of Industrial and Information Technology of Electric Vehicle Safety Evaluation,China Merchants Testing Vehicle Technology Research Institute Co.,Ltd.,Chongqing 401329,China)
出处
《蓄电池》
CAS
2022年第4期151-158,200,共9页
Chinese LABAT Man
基金
重庆市场监督管理局科技计划项目(Nos.CQSJKJ2019024)
国家自然科学基金项目(21406021)
重庆市科技局—自然科学基金面上项目(cstc2021jcyj-msxmX0542)。
关键词
类普鲁士蓝
赝电容
储能
电极材料
超级电容器
Co
Cu
ZN
prussian blue-like
pseudocapacitance
energy storage
electrode material
supercapacitor
Co,Cu,Zn
