Thanh Tam Le Thi, Tung Doan Thanh, Nguyet Ha Minh, Ngoc Linh Nguyen Thi, Dung Ngo Thanh, Van Quynh Nguyen, Van Dang Nguyen, Vernardou Dimitra, Le Top Khac, Tuan Le Anh, Minh Phan Ngoc, Lu Le Trong
Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 1000 Vietnam
Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 1000 Vietnam
RSC Adv. 2022 Jul 13;12(31):20182-20190. doi: 10.1039/d2ra02818b. eCollection 2022 Jul 6.
Large scale supercapacitor electrodes were prepared by 3D-printing directly on a graphite paper substrate from ink solution containing manganese cobalt sulfide/reduced graphene oxide (MCS/rGO) nanocomposites. The MCS/rGO composite solution was synthesized through the dispersion of MCS NPs and rGO in dimethylformamide (DMF) solvent at room temperature. Their morphology and composition were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray diffraction (EDS). The role of rGO on decreasing charge transfer resistance and enhancing ion exchange was discussed. The MCS/rGO electrode exhibits an excellent specific capacitance of 3812.5 F g at 2 A g and it maintains 1780.8 F g at a high current density of 50 A g. The cycling stability of the electrodes reveals capacitance retention of over 92% after 22 000 cycles at 50 A g.
通过将包含硫化锰钴/还原氧化石墨烯（MCS/rGO）纳米复合材料的油墨溶液直接3D打印在石墨纸基底上制备了大规模超级电容器电极。MCS/rGO复合溶液是通过在室温下将MCS纳米颗粒和rGO分散在二甲基甲酰胺（DMF）溶剂中合成的。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）和能量色散X射线衍射（EDS）研究了它们的形态和组成。讨论了rGO在降低电荷转移电阻和增强离子交换方面的作用。MCS/rGO电极在2 A g时表现出3812.5 F g的优异比电容，在50 A g的高电流密度下保持1780.8 F g。电极的循环稳定性表明，在50 A g下经过22000次循环后电容保持率超过92%。
