Nickel induced in situ growth of nickel hydroxide nanoflakes on reduced graphite oxide with high energy and power density.
- Resource Type
- Article
- Authors
- Xue, Tong; Liao, Shi-Jie; Yang, Yue; Yan, Xiang-Hui; Zou, Zhong-Li; Luo, Min
- Source
- Journal of Colloid & Interface Science. Mar2019, Vol. 537, p50-56. 7p.
- Subject
- *GRAPHITE oxide
*NICKEL compounds
*ELECTRIC capacity
*ENERGY density
*POWER density
- Language
- ISSN
- 0021-9797
Graphical abstract Abstract Layered hexagonal Ni(OH) 2 nanoflakes have been successfully fabricated on the surface of reduce graphite oxide (rGO) via nickel induced in situ growth in this study. The layers number and size of Ni(OH) 2 nanoflakes could be controlled by adjusting the concentration of Ni2+ precursors with nickel as active site on rGO surface. In the three electrode systems, the composite showed a relatively high specific capacitance achieved 1012.2 F∙g−1 at current density of 1 A∙g−1 with coulombic efficiency of 98.3%. As assembled in asymmetric devices (Ni(OH) 2 nanoflakes loaded on rGO as positive electrode and active carbon as negative electrode), the maximum specific capacitance reaches to 260.9 F∙g−1 at current density of 0.5 A∙g−1 and the energy density can be maintained at 71.1 Wh∙kg−1 at power density of 26.95 kW∙kg−1 with good rate capability and acceptable cycling stability. [ABSTRACT FROM AUTHOR]