基于导电基底的多孔银耳状氧化镍的电化学行为（英文）

Porous Tremella-like NiO on Conductive Substrates with High Electrochemical Performance

采用化学沉淀法,在导电基底上原位生长多孔状氧化镍。采用X射线衍射(XRD)、扫描电镜(SEM)和透射电子显微镜(TEM)对其结构和形貌进行了表征。采用循环伏安、恒流充放电技术和交流阻抗对其电化学性能进行了测试。结果表明,由于泡沫镍导电基底增强了电极的导电性,充分利用各组成单元的多孔特性,在电流密度为0.5 A·g^(-1)时,电极的比容量达到3.5 F·cm-2(705 F·g^(-1)),同时电极具有较好的倍率特性(电容保持率68.1%)和稳定的长循环寿命(3 000次循环后电极比容量增加17.6%)。

Porous tremella-like Ni O on conductive substrates have been fabricated by a facile chemical bath deposition approach and further investigated as the binder-free electrode for high-performance supercapacitors.The microstructure and morphologies of the resulting materials were characterized by XRD, SEM, TEM, and electrochemical measurements. Owing to the superior electrical conductivity, the porous structure of the Ni O microspheres combinated the advantages of each subunit can deliver a high areal capacitance of 3.5 F·cm-2and a corresponding specific capacitance of 705 F·g^-1at a current density of 0.5 A·g^-1, as well as a good rate capability（68.1% capacitance retention from 0.5 A·g^-1to 8 A·g^-1）, and excellent cycling stability（17.6% capacitance increasing after 3000 th cycling at high current density 12 A·g^-1）.