Archetypical 2D sheet-like Cu₂MoS₄ for all-solid-state symmetric pseudocapacitors with ultra-steady performance efficiency

Abstract

The development of ultra-efficient electrode materials is the contemporary necessity for the advancement in the supercapacitor device technologies. In this context, herein, sluggish nucleation and growth kinetics strategy has been...

Graphitic Carbon Nitride-Induced Multifold Enhancement in Electrochemical Charge Storage of CoS–NiCo2S4 for All-Solid-State Hybrid Supercapacitors

“…During charging, organized diffusion of K + ions also occurs to the N-rGO surface to form an uninterrupted capacitive double layer. Effectually, both battery- and capacitor-type electrochemical processes occur in the positive electrode, and only capacitor-type electrochemical processes occur on the negative electrode during the charge storage in the CoS–NiCo 2 S 4 /GCN||N-rGO ASSHSC device. ,, When connected to a load, the device undergoes discharging, where exactly reverse electrochemical processes occur. During discharging, spontaneous charge (e – ) transfer from N-rGO to CoS–NiCo 2 S 4 /GCN occurs, with simultaneous depletion of the capacitive double layer and reverse mobilization of OH – and K + ions.…”

Hierarchical CoMoS4 flakes with rich physico-electrochemical physiognomies for electrocatalytic oxygen evolution reaction

“…5(F), was used to fit the Nyquist plot using a complicated nonlinear least square fitting method. 68 R s , R ct , W, C dl , and C s in the equivalent circuit refers to the solution resistance, charge transfer resistance, Warburg resistance, double layer capacitance, and capacitance, respectively, during the electrochemical reactions involving the CoMoS 4 -electrolyte interface. 38,68 The small semicircle in the high frequency region specifies the charge transfer resistance (R ct ) of the CoMoS 4 electrocatalyst during OER.…”

“…68 R s , R ct , W, C dl , and C s in the equivalent circuit refers to the solution resistance, charge transfer resistance, Warburg resistance, double layer capacitance, and capacitance, respectively, during the electrochemical reactions involving the CoMoS 4 -electrolyte interface. 38,68 The small semicircle in the high frequency region specifies the charge transfer resistance (R ct ) of the CoMoS 4 electrocatalyst during OER. 30,62 From the diameter of the semicircle, the R ct value of the CoMoS 4 during OER is estimated to be B24.5 O.…”

“…Further, the solution resistance/electrolyte resistance R S has been estimated from the intercept of the Nyquist plot on the Z 0 axis, and the R S value for the process is found to be B4.5 O. 38,68 The low charge transfer and solution resistance for the system (electrocatalytic OER on CoMoS 4 ) can be accredited to the good electronic conductivity of the material and the flake-like layered microstructure, which offer lowly-restricted charge transfer and electrolyte ion diffusion during the electrochemical reactions.…”

Unveiling the potential of nanosheet-based NiTe2@MnTe hollow nanospheres in hybrid supercapacitor technology

“…9,10 This is where hybrid supercapacitors, which effectively bridge the gap between supercapacitors and batteries, come into play. 11–14 By integrating a capacitor-type electrode for high power delivery and a battery-type electrode for high energy provision, hybrid supercapacitors present an optimal solution. 15,16 However, the battery-type electrodes often lag in performance over extended use due to poor reversibility and sluggish kinetics.…”