摘要
开发兼具高能量密度和高功率密度的新型电极材料,对提升储能器件性能具有决定性意义。金属有机框架(MOF)材料因其可调控的孔隙结构、超高比表面积和丰富的氧化还原活性位点,被认为是极具潜力的超级电容器电极材料。本研究以六水合氯化钴和六水合硝酸镍为金属前驱体,吡啶-3,5-二羧酸为有机配体,采用室温水相合成法制备了具有细长棒状形貌的CoNi双金属MOF。通过保持Co:Ni摩尔比为1:1,系统调控金属离子与配体的比例(1:1、1:4、1:8),深入研究了配体含量对材料微观结构、形貌特征及电化学储能行为的影响。研究发现,当金属离子与配体比例为1:1时,材料表现出最优异的储能性能(在1 A/g的电流密度下,其比容量高达68 F/g)。本研究为高性能MOF基超级电容器电极材料的设计与开发提供了重要的理论和实验依据。
Developing electrode materials with both high energy density and high power density is critical for nextgeneration energy storage devices.Metal-organic framework(MOF)materials,with their tunable pore structures,ultrahigh specific surface area and abundant redox-active sites,are considered highly promising electrode materials for supercapacitors.A CoNi bimetallic MOF with a slender rod-like morphology was prepared using a room-temperature aqueous synthesis method,with cobalt(Ⅱ)chloride hexahydrate and nickel(Ⅱ)nitrate hexahydrate as metal precursors and pyridine-3,5-dicarboxylic acid as the organic ligand.By maintaining a Co:Ni molar ratio of 1:1 and systematically adjusting the metal-to-ligand ratio(1:1,1:4,1:8),the influence of ligand content on the material′s microstructure,morphological characteristics and electrochemical energy storage behavior was thoroughly investigated.The results revealed that when the metal-to-ligand ratio was 1:1,the material exhibited the optimal energy storage performance,with a specific capacitance as high as 68 F/g at a current density of 1 A/g.This study provided important theoretical and experimental insights for the design and development of high-performance MOF-based supercapacitor electrode materials.
作者
刘璇
王守玲
邢明
李玲玲
陈蕾
昌杰
LIU Xuan;WANG Shouling;XING Ming;LI Lingling;CHEN Lei;CHANG Jie(School of Materials and Environmental Engineering,Chizhou University,Anhui Chizhou 247000,China)
出处
《广州化工》
2026年第2期43-45,共3页
GuangZhou Chemical Industry
基金
安徽省大学生创新创业训练项目(S202411306166)
安徽省质量工程项目(2024zygzts133)
安徽省质教育厅自然科学重点研究项目(2023AH052356)。
关键词
双金属MOF
电容器
水相
bimetallic MOF
supercapacitor
aqueous phase
