导电高分子电极材料由于其自身稳定性差和迟滞的电化学反应效应等缺点限制了其实际应用．构建三维金属基＠导电高分子复合电极材料是一条行之有效的解决导电高分子固有缺陷问题的途径．本文以二氧化锰为氧化剂协同电化学聚合的方法合成了三维镍＠聚苯胺核／壳复合材料电极．经过理性设计和可控制备，该电极材料有效地提高了全方位的储能性能，其独特三维鸟巢状和高导电性的金属骨架结构有助于电解质离子和电子在电极表面的高速传输．此外，利用三维镍＠聚苯胺与前期工作已合成的三维镍＠二氧化锰＠聚吡咯分别作为正负极，一种高度匹配的不对称超级电容器也被顺利组装．经测试研究表明，这种不对称超级电容器具有良好的储能性能，工作电压能拓宽至1.3 V，最大能量密度和功率密度也能分别达到23.3 Wh·kg －1和5870.8 W·kg －1．%The poor stability and slow response during the charge-discharge cycling still limit the practical appli-cations of conducting polymers in supercapacitors.Construction of three-dimensional (3D)metal based-elec-trodes holding advanced architectures has been considered as one of the most promising ways to solve the prob-lem of conducting polymers for the achievement of superior performance.Herein,a novel nest-like 3D-Ni@polyaniline (PANI)core /shell electrode with fast ion transport and high conductive backbone for facile electron transfer was synthesized to enhance the electrochemical performance for supercapacitors.Benefiting from rational design,3D-Ni@PANI exhibited high specific capacitance (Csp),good rate capability and high cycle stability. Furthermore,an advanced asymmetric supercapacitor with high energy density,exploiting as-reported hierarchi-cal polypyrrole based composites as the anode and 3D-Ni@PANI as the cathode,has been developed.The 3D-Ni@MnO2 @PPy//3D-Ni@PANI asymmetric supercapacitor could deliver a wide operation voltage of 1 .3 V with maximum energy and power densities of 23.3 Wh·kg -1 and 5 870.8 W·kg -1 .
展开▼
