In-situ formation of morphology-controlled cobalt vanadate on CoO urchin-like microspheres as asymmetric supercapacitor electrode

Two biomass material-derived self-doped (N/O) porous carbons from waste coriander and lilac with high specific surface areas and high capacitance for supercapacitors

“…The charge transfer resistance ( R ct ) at the interface between the electrolyte and the electrode can be correlated with the diameter of the semicircle in the high frequency region of the Nyquist curve. 42 A magnified view of the high frequency region is illustrated in Fig. 5c.…”

“…5c. The R ct value of CPC-600 (0.36 O) can be seen to be significantly lower than that of CPC-500 (0.86 O) and CPC-700 (0.44 O), which indicates that CPC-600 has good electrical conductivity 42,43 and can be due to the better storage of energy by the N, O groups on its electrode surface through chemical reactions. The contact resistance (R s ) values of CPC-500, CPC-600 and CPC-700 obtained from the intercept of the semicircle and solid axis are 1.28, 1.23 and 1.26 O, respectively.…”

Enhanced supercapacitor performance of porous carbon through tuning maceral composition proportion of coal

“…The specific capacitances were calculated according to eqn (1), 32,33 where C s is the specific capacitance, I is the applied current, Δ t is the discharge time, M is the mass loading of active materials, and Δ V is the actual potential window in the discharge process.…”

Mechanochemically Assisted Microwave-Induced Plasma Synthesis of a N-Doped Graphitic Porous Carbon-Based Aqueous Symmetric Supercapacitor with Ultrahigh Volumetric Capacitance and Energy Density

“…Therefore, to provide an adequate solution, extensive research has been done for decades by proposing new electrode materials and controlling their structure–property relationships through various means. Encouraging outcomes have emerged from research on diverse materials, such as perovskite, , metallic carbides, transition metal oxides, porous activated carbons, carbide-derived carbons, mesoporous carbons, carbon nanofibers, carbon nanotubes, graphene materials, carbon nanocages, polyaniline/graphene composites, porous carbon/graphene hybrids, heteroatom-doped carbons, and many more . Within the array of reported electrodes, porous carbon-based options stand out for their potential due to their high specific surface areas, abundant availability, and excellent electrical conductivity.…”