School of Chemical Engineering, Yeungnam University, Gyeongsan-si, Gyeongbuk 712-749, South Korea.
School of Chemical Engineering, Yeungnam University, Gyeongsan-si, Gyeongbuk 712-749, South Korea.
J Colloid Interface Sci. 2017 Nov 15;506:613-619. doi: 10.1016/j.jcis.2017.07.087. Epub 2017 Jul 25.
The development of manganese dioxide-based nanocomposites as materials for energy storage applications is advantageous because of its polymorphism behavior and structural flexibility. In this study, manganese dioxide (MnO) nanorod-intercalated reduced graphene oxide (rGO) nanocomposite was obtained through a simple hydrothermal method and their electrochemical supercapacitance was studied in a three electrode half-assembly electrochemical cell. The basic spectroscopic and diffraction data including Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy were employed to characterize the resulting nanocomposite. Cyclic voltammetry and galvanostatic charge-discharge measurements were conducted to evaluate the electrochemical supercapacitance of the rGO-MnO nanocomposite electrode. The rGO-MnO nanocomposite delivered significantly higher capacitance than the P-MnO under similar measurement conditions. This enhanced supercapacitive performance of the rGO-MnO nanocomposite was attributed to chemical interactions and the synergistic effect between rGO and MnO, which was helpful in enhancing the electrical conductivity and providing sufficient space for electrode/electrolyte contact during the electrochemical reaction.
以二氧化锰（MnO）纳米棒插层还原氧化石墨烯（rGO）纳米复合材料的开发作为储能应用的材料具有优势，因为其具有多晶型行为和结构灵活性。在这项研究中，通过简单的水热法获得了二氧化锰（MnO）纳米棒插层还原氧化石墨烯（rGO）纳米复合材料，并在三电极半组装电化学电池中研究了其电化学超级电容器性能。采用基本的光谱和衍射数据，包括拉曼光谱、扫描电子显微镜和透射电子显微镜来对所得纳米复合材料进行表征。通过循环伏安法和恒电流充放电测量来评估 rGO-MnO 纳米复合材料电极的电化学超级电容器性能。在相似的测量条件下，rGO-MnO 纳米复合材料的比容量明显高于 P-MnO。rGO-MnO 纳米复合材料的这种增强的超级电容器性能归因于 rGO 和 MnO 之间的化学相互作用和协同效应，这有助于提高电导率并在电化学反应期间为电极/电解质接触提供足够的空间。
