KOH和K3[Fe(CN)6]混合液中颗粒孔径对NiO电极电容器性能的影响  

Effect of Pore Size on Pseudo-Capacitive Performance of NiO in the Mixed Electrolyte of KOH and Hexacyanoferrate

作　　者：吴雯[1] 侯孟炎[1] 周丹丹[1] 夏永姚[1] 

机构地区：[1]复旦大学化学系,上海市分子催化和功能材料重点实验室,上海200433

出　　处：《电化学》2011年第2期169-174,共6页Journal of Electrochemistry

基　　金：国家自然科学基金重点项目(20633040);上海市科委(08DZ2270500)资助

摘　　要：合成5种孔径大小分布的NiO样品,测定各NiO电极在3 mol/L KOH或其添加K3[Fe(CN)6]的电解液中的电化学电容性能.结果表明,NiO电极孔径分布在15 nm左右,可有效减慢铁氰酸根离子向液相的扩散,从而提高N4(NiO)电极的充放电效率.In this paper,five kinds of NiO samples with different pore size distributions were synthesized.The electrochemical capacitance of the samples were characterized in 3 mol/L KOH solution with and without hexacyanoferrate addition.Electrochemical test results indicated that the NiO sample with an optimum pore size of about 15 nm shows high Coulombic efficiency of the N4（NiO） electrode as the redox reaction of hexacyanoferrate ions would be limited in the pore,thus prevent ion diffusion into the bulk electrolyte solution.

关 键 词：超级电容器 NIO 多孔材料 K3[Fe(CN)6] 

分 类 号：O646.54[理学—物理化学]