CoFe Prussian blue analogues on 3D porous N-doped carbon nanosheets boost the intercalation kinetics for a high-performance quasi-solid-state hybrid capacitor
Abstract:Prussian blue analogues (PBAs), especially those with crystal water networks, have attracted extensive attention for aqueous electrolyte-based energy storage devices.
“…However, most reported PBA-based composites suffer from lower adsorption capacities and slower adsorption rates compared with those of pure PBA powder. [7][8][9] Therefore, the synthesis of PBA-based composite materials with a rapid adsorption rate, high adsorption capacity, considerable stability and good reusability is still urgently desirable.…”
A defect-rich Zn–PBA/NPC composite was engineered for the first time, and it demonstrated excellent Cs+ removal performance, with an ultrafast Cs+ adsorption rate and high adsorption capacity.
“…However, most reported PBA-based composites suffer from lower adsorption capacities and slower adsorption rates compared with those of pure PBA powder. [7][8][9] Therefore, the synthesis of PBA-based composite materials with a rapid adsorption rate, high adsorption capacity, considerable stability and good reusability is still urgently desirable.…”
A defect-rich Zn–PBA/NPC composite was engineered for the first time, and it demonstrated excellent Cs+ removal performance, with an ultrafast Cs+ adsorption rate and high adsorption capacity.
“…Warburg impedance could be indicated in the region of medium frequencies, where the electrolyte ion penetrated into the depth of the micro/mesoporous network of the GLAC-2 electrode. 64 The inconspicuous semicircle in the high-frequency region of the plot displays a negligible charge-transfer resistance and a fast faradaic response in the electrode material, owing to the porous structures and functional groups of the electrode material. However, the capacitance is slowly developed at high frequencies, due to the abundant charge transfer complexes migrating with the rapid variety of the potential by overcoming the activation energy.…”
Electrochemical ultracapacitors derived from green and sustainable materials could demonstrate superior energy output and an ultra-long cycle life owing to large accessible surface area and obviously shortened ion diffusion pathways.
“…20,47 Besides, the involved battery-type energy storage mechanism in the a-Ni 0.95 Cu 0.05 MoO 4 @CC electrode was further investigated by a power law and Bruce Dunn's kinetic analysis. 48,49 This kinetic analysis is initially described using eqn (6). Herein, the i total represents two parts.…”
Development of hierarchical nano/microarchitectures and cation-doping strategies enhancing the electrochemical activity for supercapacitors have been well established. However, creating oxygen vacancies (OV) during the metal cation-exchange process could intrinsically modify...
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