Supercapacitors based on carbide-derived carbons synthesised using HCl and Cl2 as reactants

Huge enhancement of energy storage capacity and power density of supercapacitors based on the carbon dioxide activated microporous SiC-CDC

“…Yushin and coworkers [11] established that the mesopores in SiC-CDC allowed for a greatly increased specific surface area up to 2430 m 2 g À1 and peaking specific capacitance 170 F g À1 , in aqueous electrolytes, thus nearly doubling the previously reported values [12]. Simon and coworkers showed that evaluation of the ordered mesoporous SiC-CDC as an electrode material for supercapacitors terminates as respectable gravimetric capacitance 80 F g À1 in non-aqueous electrolyte, nearly 40 F g À1 lower than that established for TiC-CDC or Mo 2 C-CDC based supercapacitors [5,9,[14][15][16]. High capacity retention (up to 1 V s À1 ) at high cyclation rate has been demonstrated compared to other high specific surface area porous carbons, explained by the quick mass-transfer processes in mesopores and bigger micropores [5,9,[14][15][16].…”

“…Simon and coworkers showed that evaluation of the ordered mesoporous SiC-CDC as an electrode material for supercapacitors terminates as respectable gravimetric capacitance 80 F g À1 in non-aqueous electrolyte, nearly 40 F g À1 lower than that established for TiC-CDC or Mo 2 C-CDC based supercapacitors [5,9,[14][15][16]. High capacity retention (up to 1 V s À1 ) at high cyclation rate has been demonstrated compared to other high specific surface area porous carbons, explained by the quick mass-transfer processes in mesopores and bigger micropores [5,9,[14][15][16]. Systematic analysis of electrochemical impedance data showed a low intrinsic resistance of CDC based systems, high ion accessibility to the microporous-mesoporous hierarchical structure, and thus a remarkably low relaxation time of the system, evidencing that the use of such hierarchical porous carbons for high power supercapacitors is very promising [5,8,[13][14][15][16].…”

Steam and Carbon Dioxide Co-Activated Silicon Carbide-Derived Carbons for High Power Density Electrical Double Layer Capacitors

“…After drying under vacuum, the pure Al layer (2 μm) was deposited onto one side of the CDC by the magnetron sputtering method. [19][20][21] The electrolyte used was prepared from pure acetonitrile (AN, H 2 O <20 ppm), and from dry (C 2 H 5 ) 3 CH 3 NBF 4 (Stella Chemifa). The two-electrode standard Al test cell (HS Test Cell, Hohsen Corporation) with two identical electrodes (geometric area of about 2.0 cm 2 ) was completed inside a glove box (Labmaster sp, MBraun; O 2 and H 2 O concentrations lower than 0.1 ppm) and all electrochemical experiments were carried out at temperature T = 20…”

Carbon materials for supercapacitor application by hydrothermal carbonization of D-glucose

“…The specific surface area, micropore surface area (S micro ), micropore volume (V micro ) and total pore volume (V tot ) and other parameters for porous carbon materials were calculated according to the Brunauer-Emmett-Teller and t-plot method. The pore size distribution was determined using non local density functional theory assuming a slit-shaped pores model [7][8][9]13,16]. …”

“…In the present work, activated carbons (ACs) were synthesised from D-glucose by using HTC method followed by pyrolysis and activation with carbon dioxide at 900 °C with different activation step lengths to prepare carbon materials with variable specific surface area, pore size distribution and optimal ratio of micro-and mesopores for supercapacitor application [5][6][7][8][9][10][11][12][13][14][15][16]. Synthesised carbon materials were noted as GDAC (glucose derived activated carbon).…”