Construction of porous carbon nanosheets by dual-template strategy for zinc ion hybrid capacitor

ZIF-Derived Carbon Microspheres for High-Performance Zinc-Ion Capacitors

“…Thermal analysis revealed that the composite microspheres exhibited a slight weight loss at ∼400 °C, indicating the destruction of ZIF-8 particles after the hydro/solvothermal process. The thermal pyrolysis rates were reduced for composites in the higher temperature region 41 PCNs-2, 42 WC-6ZnN-12U, 43 B/N LDC, 34 BCF, 44 GH film, 45 C-800, 46 MPC-2, 47 AC, 48 OPCNF-20, 49 CT/SWNT-30, 50 and NPFC, 51 ), and long-term cycling stability measurements of ZICs prepared with the (h) AC-H 2 O cathode and (i) AC-AN cathode. (600−800 °C) (Figure S8), ascribing to the cross-linked polymeric structure.…”

“…(a) Structure diagram of the fabricated ZICs using porous carbon microspheres as the cathodes, CV profiles for (b) AC-H 2 O and (c) AC-AN, GCD profiles for (d) AC-H 2 O and (e) AC-AN, (f) rate performance at current densities from 0.5 to 20 A g –1 , (g) Ragone plots and comparison with other carbon cathode-based ZICs (PSC-600, PCNs-2, WC-6ZnN-12U, B/N LDC, BCF, GH film, C-800, MPC-2, AC, OPCNF-20, CT/SWNT-30, and NPFC,), and long-term cycling stability measurements of ZICs prepared with the (h) AC-H 2 O cathode and (i) AC-AN cathode.…”

High-energy-density zinc ion capacitors based on 3D porous free-standing defect-reduced graphene oxide hydrogel cathodes

“…From Table 1, the excellent power density of DRGO//Zn ZIC far exceeds that of comparable carbon-based ZIC devices. [54][55][56][57][58][59][60][61] The outstanding power density demonstrated by the 3D DRGO//Zn ZIC reveals great promise for improving SC power density by designing ZIC devices. As shown in Fig.…”

Ammonium persulfate assisted synthesis of ant-nest-like hierarchical porous carbons derived from chitosan for high-performance supercapacitors and zinc-ion hybrid capacitors

“…Furthermore, the coupled diffusion/capacitive behavior in the charge storage process is veried by the observation of the reversible reduction peak and oxidation peak. 73,75 By examining the redox peaks of CV curves at different scan rates, the behavior of energy storage is further investigated based on the power law relationship established by using eqn ( 4) and ( 5) between the scan rate and the peak present in the CV curve. The b values of the cathodic and anodic peaks, determined to be 0.785 and 0.814 respectively, were derived from the logarithmic relationship between the peak current and scan rate, as illustrated in Fig.…”

“…AH-PCs//Zn displays peak energy densities of 137.61 W h kg −1 at a power density of 80 W kg −1 and 69.78 W h kg −1 at 16 000 W kg −1 , considerably surpassing the This journal is © The Royal Society of Chemistry 2024 energy densities of earlier reported ZIHCs (Table S6 †). 39,50,51,54,68,[71][72][73][74][75] Typically, rapid charging and discharging at elevated current densities can readily compromise the integrity of electrode materials, resulting in a swi decline in electrode capacity 38 Nonetheless, the ability to charge/discharge at high currents remains a crucial metric for energy storage systems. In this work, the assembled AH-PCs//Zn demonstrates complete capacitance retention (100%) and nearly perfect coulombic efficiency (close to 100%) aer 20 000 cycles at 20 A g −1 , showcasing outstanding cycling stability (Fig.…”