Majid S R
Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Sci Rep. 2015 Nov 5;5:16195. doi: 10.1038/srep16195.
This paper presents the preparation of in situ electrodeposited rGO/MnO2 nanocomposite as a binder-free electrode for supercapacitor application. The work describes and evaluates the performance of prepared electrode via green and facile electrodeposition technique of in situ rGO/MnO2-glucose carbon nanocomposites. The carbon content in the composite electrode increased after GO and D (+) glucose solution has been added in the deposition electrolyte. This study found that a suitable concentration of D (+) glucose in the deposition electrolyte can slow down the nucleation process of MnO2 particles and lead to uniform and ultrathin nanoflakes structure. The optimize electrode exhibited low transfer resistance and resulted on excellent electrochemical performance in three electrolyte systems viz. Na2SO4, KOH and KOH/K3Fe(CN)6 redox electrolytes. The optimum energy density and power density were 1851 Whkg(-1) and 68 kWkg(-1) at current density of 20 Ag(-1) in mixed KOH/K3Fe(CN)6 electrolyte.
本文介绍了原位电沉积rGO/MnO₂纳米复合材料作为超级电容器应用的无粘结剂电极的制备方法。该工作通过原位rGO/MnO₂-葡萄糖碳纳米复合材料的绿色简便电沉积技术描述并评估了制备电极的性能。在沉积电解液中加入氧化石墨烯（GO）和D(+)葡萄糖溶液后，复合电极中的碳含量增加。本研究发现，沉积电解液中合适浓度的D(+)葡萄糖可以减缓MnO₂颗粒的成核过程，并导致形成均匀且超薄的纳米片状结构。优化后的电极表现出低转移电阻，并在三种电解质体系（即Na₂SO₄、KOH和KOH/K₃Fe(CN)₆氧化还原电解质）中具有优异的电化学性能。在混合KOH/K₃Fe(CN)₆电解质中，当电流密度为20 Ag⁻¹时，最佳能量密度和功率密度分别为1851 Whkg⁻¹和68 kWkg⁻¹。
