Fabrication of a Hierarchical Ni(OH)(2)@Ni3S2/Ni Foam Electrode from a Prussian Blue Analogue-Based Composite with Enhanced Electrochemical Capacitive and Electrocatalytic Properties
Fabrication of a Hierarchical Ni(OH)(2)@Ni3S2/Ni Foam Electrode from a Prussian Blue Analogue-Based Composite with Enhanced Electrochemical Capacitive and Electrocatalytic Properties
复制标题
具有增强电化学电容和电催化性能的普鲁士蓝类似物复合材料制备分层 Ni(OH)(2)@Ni3S2/Ni 泡沫电极
DOI：
10.1002/chem.201904324
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Xiao Zhisong
中科院分区：
文献类型：
--
作者：
Chen Xiaojuan;Yang Longkun;Huang Yunxia;Ge Shuaipeng;Zhang Hao;Cui Yimin;Huang Anping;Xiao Zhisong
开发高效、经济、耐用的电极对电化学电容器和电催化具有重要意义。本文报道了一种由氢氧化镍纳米片@硫化镍纳米立方体阵列组成的三维双功能电极。三维高阶多孔结构和不同组分的协同作用使电极具有较大的比表面积、方便的离子/电子传输路径和改善的导电性。结果表明，Ni(OH)2@Ni3S2/Nf电极在电流密度为1 A g 1时的比容量为2 11 mA h g−1，5 A g−1循环5 000 后的容量保持率为73 %。Ni(OH)2@Ni3S2/Nf电极对析氢反应具有良好的电催化活性，在电流密度为10和100 mA g−2时，过电位分别为140和2 10 mV。这种独特的高阶多孔结构的合成策略可以推广到制备其他储能和转换用复合材料。
Developing high‐efficiency, cost‐effective, and durable electrodes is significant for electrochemical capacitors and electrocatalysis. Herein, a 3D bifunctional electrode consisting of nickel hydroxide nanosheets@nickel sulfide nanocubes arrays on Ni foam (Ni(OH)2@Ni3S2/NF) obtained from a Prussian blue analogue‐based precursor is reported. The 3D higher‐order porous structure and synergistic effect of different compositions endow the electrode with large specific surface area, facile ion/electron transport path, and improved conductivity. As a result, the Ni(OH)2@Ni3S2/NF electrode exhibits a high specific capacity of 211 mA h g−1at a current density of 1 A g−1and 73 % capacity retention after 5000 cycles at 5 A g−1. Moreover, the Ni(OH)2@Ni3S2/NF electrode has superior electrocatalytic activity for the hydrogen evolution reaction with low overpotentials of 140 and 210 mV at current densities of 10 and 100 mA cm−2, respectively. The synthetic strategy for the unique higher‐order porous structure can be extended to fabricate other composite materials for energy storage and conversion.