Chen Bohua, Zhong Yu, Shen Gengzhe, Wang Fengming, Liu Zhihao, Chen Mei, Yang Weijia, Zhang Chi, He Xin
School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, China.
Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
Nanomaterials (Basel). 2020 Jan 22;10(2):194. doi: 10.3390/nano10020194.
To enhance the connection of electroactive materials/current collector and accelerate the transport efficiency of the electrons, a binder-free electrode composed of nickel oxide anchored CoO nanoparticles on modified commercial nickel foam (NF) was developed. The nickel oxide layer with lamellar structure which supplied skeleton to load CoO electroactive materials directly grew on the NF surface, leading to a tight connection between the current collector and electroactive materials. The fabricated electrode exhibits a specific capacitance of 475 F/g at 1 mA/cm. A high capacitance retention of 96% after 3000 cycles is achieved, attributed to the binding improvement at the current collector/electroactive materials interface. Moreover, an asymmetric supercapacitor with an operating voltage window of 1.4 V was assembled using oxidized NF anchored with cobalt oxide as the cathode and activated stainless steel wire mesh as the anode. The device achieves a maximum energy density of 2.43 Wh/kg and power density of 0.18 kW/kg, respectively. The modified NF substrate conducted by a facile and effective electrolysis process, which also could be applied to deposit other electroactive materials for the energy storage devices.
为了增强电活性材料与集流体之间的连接并提高电子传输效率，开发了一种由负载在改性商用泡沫镍（NF）上的氧化镍锚定的CoO纳米颗粒组成的无粘结剂电极。具有层状结构的氧化镍层直接生长在NF表面，为负载CoO电活性材料提供骨架，从而使集流体与电活性材料紧密连接。制备的电极在1 mA/cm² 时的比电容为475 F/g。在3000次循环后实现了96%的高电容保持率，这归因于集流体/电活性材料界面处结合的改善。此外，以负载氧化钴的氧化NF为阴极、活性不锈钢丝网为阳极组装了工作电压窗口为1.4 V的非对称超级电容器。该器件的最大能量密度和功率密度分别达到2.43 Wh/kg和0.18 kW/kg。通过简便有效的电解工艺改性的NF基底，也可用于为储能器件沉积其他电活性材料。
