Influence of carbon conductive additives on electrochemical double-layer supercapacitor parameters

Solution-processed graphene oxide electrode for supercapacitors fabricated using low temperature thermal reduction

“…The series of MD simulations, therefore, was performed to predict the evolution of the reduction process of rGO and the atomic structures aer reduction at 600 K and 1300 K. The initial structure of GO (Fig. 4 1,3,4,9,17,32,33,[38][39][40][41][42][43][44][45][46][47] (b) Ragone plot of the energy and power densities of SC reported over the last three years (since 2017). [48][49][50][51][52][53][54][55][56][57][58] The black solid square represents the SC made of rGO electrode reduced at very high temperature around 900 C (ref.…”

“…6(a), the specic capacitance of the PR-rGOtype EDLC at around 240 F g À1 satises the expectation set by the performance trend of EDLCs with carbon material-based electrodes published in the literature since 2006. 1,3,4,9,17,32,33,[38][39][40][41][42][43][44][45][46][47] Previous studies have either used expensive equipment to reduce GO to rGO at very high temperature of about 1000 C under an environment of hydrogen gas 1 or used toxic substances to induce the chemical reduction of GO to rGO. 46 Others had improved the specic capacitance of the EDLCs through the increase in the contact area between the electrolyte and the electrode by rst widening the space between the GO sheets using additives.…”

“…16 Since the charging and discharging rate increases as the electric charge moves faster, the resistance of the electrode itself should be small. 17 Moreover, the power sources that operate these electronics should be light and small due to the increased utilization of the miniaturized and portable electronics. Consequently, the method that preserve the high surface area of electrode without the additives is required for the EDLCs as the power source.…”

“…6 SC performance of devices with carbon material-based electrodes and aqueous electrolyte. (a) Specific capacitance of EDLCs published in literature since 2006 1,3,4,9,17,32,33,[38][39][40][41][42][43][44][45][46][47]. (b) Ragone plot of the energy and power densities of SC reported over the last three years (since 2017) [48][49][50][51][52][53][54][55][56][57][58].…”

Preparation of kraft lignin-based activated carbon fiber electrodes for electric double layer capacitors using an ionic liquid electrolyte

“…The current research on the lignin conversion to the carbonaceous material has focused on the preparation of electrodes for the energy storage device, e. g., electric double layer capacitor (EDLC) (Espinoza-Acosta et al 2018;Kumar et al 2019). Several attempts have also been made to improve the electrochemical performance of ligninbased EDLCs: e. g., increasing the specific surface area of the electrode by producing sub-micron to nano-fibers for increasing in active sites and specific capacitance (Ago et al 2016;Park et al 2019), improving the conductivity by adding conductive materials (Kiseleva et al 2018;Saha et al 2014), and increasing the voltage window by using ionic liquid (IL) electrolytes (De Vos et al 2014;Mousavi et al 2016). Among the improved electrodes, Lei et al (2017) reported a lignin/PAN-based electrode with the highest specific capacitance of 1760 F g −1 , but the energy density (47.8 Wh kg −1 ) and power density (0.8 kW kg −1 ) were not impressive.…”