Role of electrolytes on the electrochemical characteristics of Fe3O4/MXene/RGO composites for supercapacitor applications

Heterogeneous Ni-MOF/V2CTx–MXene hierarchically-porous nanorods for robust and high energy density hybrid supercapacitors

“…The diffusion coefficients of all the electrodes can be determined by using the following equation: σ = RT /( n 2 F 2 A 2 1/2 )(1/ CD 1/2 ), where R is the universal gas constant (J mol −1 K −1 ), T is the temperature during the experiment (K), n is the number of electrons transferred, A is the active area of the electrode (cm 2 ), D is the diffusion of the electrolyte ions (cm 2 s −1 ), C is the concentration of the electrolyte (mol cm −3 ) & F is the Faraday constant (C mol −1 ). 33,34 For battery type electrodes, the faradaic efficiency or energy efficiency can be determined from the GCD curve using the equation: η E = E int/D / E int/C , where E int/D and E int/C refer to the discharge and charge energies of the electrode. The discharge energy ( E int/D ) should be calculated by integrating the area under the discharge curve: The charge energy ( E int/C ) can be obtained from the area of the charge curve.…”

“…, where R is the universal gas constant (J mol À1 K À1 ), T is the temperature during the experiment (K), n is the number of electrons transferred, A is the active area of the electrode (cm 2 ), D is the diffusion of the electrolyte ions (cm 2 s À1 ), C is the concentration of the electrolyte (mol cm À3 ) & F is the Faraday constant (C mol À1 ). 33,34 For battery type electrodes, the faradaic efficiency or energy efficiency can be determined from the GCD curve using the equation:…”

Roles of Metal Ions in MXene Synthesis, Processing and Applications: A Perspective

“…[ 108 ] After annealing, the composite electrode had a capacitance of 212.1 F g −1 at 1 A g −1 . Similarly, other composite electrodes have been extensively investigated, such as Ti 3 C 2 /MoS 2 , [ 115 ] Ti 3 C 2 /CuS, [ 116 ] Ti 3 C 2 /FeOOH quantum dots, [ 117 ] Ti 3 C 2 /NiCoFe‐LDH, [ 118 ] Ti 3 C 2 /NiFe‐LDH, [ 119 , 120 ] Ti 3 C 2 /Ni 3 S 2 , [ 121 ] Ti 3 C 2 /Fe 3 O 4 , [ 122 ] Ti 3 C 2 /Ni 2 CO 3 (OH) 2 , [ 123 ] etc.…”

Micro‐Structural and Flexible Reduced Graphene Oxide/Ti3C2Tx Composite Film Electrode with Long Cycle Life for Supercapacitor

“…The GCD and CV curves of the film electrodes are shown in Figure S9, Supporting Information, all electrodes are stable in the electrolytes and show an electric double layer capacitor (EDLC) and pseudocapacitive mixed behavior. [ 35 ] The specific gravimetric capacitance of the rGM‐20 composite film electrode in 6 m KOH and 1 m Na 2 SO 4 electrolytes are 141 and 82 F g −1 at 1 A g −1 , respectively. The order of the electrochemical performance for flexible rGO/MXene composite film can be given as 3 m H 2 SO 4 > 6 m KOH > 1 m Na 2 SO 4 , the better electrochemical performance in the acidic and alkaline electrolytes are largely due to the higher ionic conductivity and smaller hydrated ion radius of H + and OH − , which actively take part in the pseudocapacitive ion intercalation/deintercalation process.…”

“…[ 33 ] Similarly, GO is also susceptible to restack as 2D materials so that directly mixed reduced graphene oxide (rGO) and MXene may have limited effect on inhibiting self‐stacking. [ 34,35 ] Therefore, it is also a good idea to induce micro‐surface structure while maintaining the morphology of 2D flexible composite film, making it attractive for miniaturized and compact energy storage devices. [ 36 ]…”