Performance enhancement of single-walled nanotube–microwave exfoliated graphene oxide composite electrodes using a stacked electrode configuration

Abstract

Optimised SWNTs/MW-rGO supercapacitor in a stacked electrode configuration, leading to an enhancement of energy density.

Chemically converted graphene: scalable chemistries to enable processing and fabrication

“…71 A composite material consisting of GO exfoliated under microwave radiation and manganosite (MnO) was synthesized to explore their potential as electrode material. 72 LIQUID CRYSTALLINE DISPERSIONS OF GRAPHENE OXIDE Natural graphite is the source of choice for LCGO production. The common approaches to exfoliate GO, discussed earlier, apply extensive mechanical forces such as sonication that break down the GO sheets usually to sub-micron sizes.…”

Facile Fabrication of Flexible Microsupercapacitor with High Energy Density

“…In Supporting Information Figure S4a, distinct peaks at 2 Θ = 9.26° and 2 Θ = 7.9° were found in GO and GO‐PEDOT/PSS samples. These peaks are related to the (002) diffraction of graphene sheet, from which the interlayer d spacing values have been calculated to be 0.95 and 1.12 nm according to Bragg's law (Equation (S1), Supporting Information) . This slight increase of interlayer spacing in GO‐PEDOT/PSS composite film could be attributed to the intercalation of PEDOT/PSS in between GO layers .…”

“…In general, device capacitance can be increased by using higher active electrode mass loading, which also results in thicker electrodes . However, an increase in the mass loading and electrode thickness can also increase the electrode resistance and affect the overall device performance (rate capability, aerial, and volumetric capacitance) . Here we investigated the device performance of fMSCs(20) interdigitated device as a function of electrode thickness ( T ; from 6 to 58 μm) using CV measurements.…”

Synergistic interaction between redox-active electrolytes and functionalized carbon in increasing the performance of electric double-layer capacitors

“…The specific capacitance ( C m ) decreases with the increasing current density. The specific capacitance of the electrodes and their energy and power densities ( E D and P D ) were calculated from the following equation [33][34][35][36] :…”

“…The energy density of the FAC with the KOH-K 3 Fe(CN) 6 electrolyte reached 23.9 W h kg −1 at a power density of 10 0 0 W kg −1 and remained at 18 W h kg −1 with a power density of 10,0 0 0 W kg −1 . The high percentage of FAC electrode with oxygen groups introduced more active sites for efficient accessibility of the active center [34] . The enhanced performance of the FAC in the KOH-K 3 Fe(CN) 6 electrolyte could be attributed to the pseudocapacitance of the faradaic reaction of Fe(CN) 6 3 − /Fe(CN) 6 4 − , which is enhanced by the catalytic action of the surface functional groups.…”