Qi Fangya, Lu Xiaoyi, Wang Yiqian, Zhang Hongbo, Trukhanov Alex, Sun Zhipeng
School of Materials and Energy, Guangdong University of Technology, No.100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou 510006, P. R. China.
Functional Materials Centre, SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", 19 P. Brovki St, Minsk 220072, Belarus; Nanotechnology R&E Centre, South Ural State University, 76, Lenina ave, Chelyabinsk 454080, Russia.
J Colloid Interface Sci. 2022 Feb;607(Pt 2):1253-1261. doi: 10.1016/j.jcis.2021.09.046. Epub 2021 Sep 11.
Advanced integrated electrode materials with designedcore-shell nanostructureplay a crucial role for the application in alternative energy storage system. Herein, hierarchical MoO@NiCo(OH) core-shell arrays were equably grown on face of carbon cloth after a series of hydrothermal growth and electrochemical deposition processes. This core-shell arrays structure can not only provide large electroactive surface areas and high speed ion transport paths, but also keep the material structure stable during the process of redox reactions. Thus MoO@NiCo(OH) displays excellent electrochemical performance (4.7 F cm at 10 mA cm). Moreover, the asymmetric supercapacitor is assembled with MoO@NiCo(OH) and carbon nanotubes, which delivers a maximal energy density of 0.50 mWh cm at 4.25 mW cm, high specific capacitance and superior cycling stability (94.5% capacitance retention after 5000 cycles). We believe that MoO@NiCo(OH) arrays could be a great prospective candidate energy storage materials.
具有设计的核壳纳米结构的先进集成电极材料在替代能源存储系统的应用中起着至关重要的作用。在此，经过一系列水热生长和电化学沉积过程后，分层的MoO@NiCo(OH)核壳阵列均匀地生长在碳布表面。这种核壳阵列结构不仅可以提供大的电活性表面积和高速离子传输路径，而且在氧化还原反应过程中还能保持材料结构稳定。因此，MoO@NiCo(OH)表现出优异的电化学性能（在10 mA cm时为4.7 F cm）。此外，用MoO@NiCo(OH)和碳纳米管组装了不对称超级电容器，在4.25 mW cm时提供了0.50 mWh cm的最大能量密度、高比电容和优异的循环稳定性（5000次循环后电容保持率为94.5%）。我们相信MoO@NiCo(OH)阵列可能是一种极具前景的候选储能材料。
