Kim, So Yeun Wee, Jae-Hyung Yang, Cheol-Min Kim, Bo-Hye 2024-01-20T00:32:47Z 2024-01-20T00:32:47Z 2021-09-04 2017-09-15 1572-6657 https://pubs.kist.re.kr/handle/201004/122284 2-(Trimethylsilyloxy)ethyl methacrylate (SMA)-derived mesoporous carbon nanofiber composite containing MnO2 (Si-Mn-CNF) is fabricated by electrospinning method and found to be a very promising candidate for supercapacitor electrodes. Si-Mn-CNF possesses a large surface area of 707 m(2) g(-1), high pore volume of 2.35 cm(3) g(-1), and high mesopore fraction of 65%. Herein, SMA is used as an activating agent to develop the mesoporous structure by the thermal decomposition of SMA without activation process. As a result, Si-Mn-CNF exhibits a high specific capacitance of 200 Fg(-1) at a discharge current density of 1 mAcm(-2) and energy density of 23.72 Whkg(-1) at a power density of 400 Wkg(-1). in 6 M KOH aqueous electrolyte, due to the pseudocapacitive character associated with the surface redox-type reactions of the MnO2 nanoparticles (NPs). Furthermore, the Si-Mn-CNF electrode retains a specific capacitance of over 85% of the initial value at a discharge current density of 20 mAcm(-2) compared with only 40% for Mn-CNF without using SMA, due to the rapid diffusion of electrolyte ions and the decrease of resistive characteristics through the developed mesoporous structures. Therefore, Si-MnCNF with high mesoporosity induced by SMA exhibits excellent electrochemical performance in terms of high specific capacitance and energy density, and excellent capacitance retention. English ELSEVIER SCIENCE SA FLEXIBLE SUPERCAPACITORS HIERARCHICAL COMPOSITES MANGANESE-DIOXIDE ACTIVATED CARBON GRAPHENE OXIDE ENERGY-STORAGE FABRICATION NANOPARTICLES ELECTRODES NANOSHEETS Electrochemical capacitor performance of 2-(trimethylsilyloxy)ethyl methacrylate-derived highly mesoporous carbon nanofiber composite containing MnO2 Article 10.1016/j.jelechem.2017.07.028 1 JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.801, pp.403 - 409 JOURNAL OF ELECTROANALYTICAL CHEMISTRY 801 403 409 scie scopus 000411847500052 2-s2.0-85027411482 Chemistry, Analytical Electrochemistry Chemistry Electrochemistry Article FLEXIBLE SUPERCAPACITORS HIERARCHICAL COMPOSITES MANGANESE-DIOXIDE ACTIVATED CARBON GRAPHENE OXIDE ENERGY-STORAGE FABRICATION NANOPARTICLES ELECTRODES NANOSHEETS Mesoporosity 2-(Trimethylsilyloxy)ethyl methacrylate MnO2 Carbon nanofiber composite Electrochemical capacitor