In-situ ZnO template preparation of coal tar pitch-based porous carbon-sheet microsphere for supercapacitor

Ultrahigh‐areal‐capacitance aqueous supercapacitors enabled by soft biomass‐derived porous carbon membrane

“…[9][10][11][12] Furthermore, the biodiversity of biomass offers a nearly limitless carbon source for the preparation of porous carbon materials with special structures and properties. 13 Up to now, numerous biomass materials, such as wheat straw, 14 abutilon, 15 chestnut shell, 16 and foxtail grass, 17 have been used as sustainable carbon precursors to prepare porous carbon materials for SCs. However, the practical use of these carbon materials has been largely hampered by their powdered status.…”

Hierarchical porous carbon derived from coal tar pitch by one step carbonization and activation combined with a CaO template for supercapacitors

“…9(d), (e) and (f), the Nyquist plots of all the HPC electrodes display similar curves consisting of a semicircle in the high frequency region, a sloping (about 45°) line in the medium frequency region assigned to the Warburg impedance and an oblique line in the low frequency region. 53 The real axis ( Z ′) intercept in the high frequency region represents the equivalent series resistance ( R s ) and the diameter of the semicircle stands for the charge transfer resistance ( R ct ). The R s and R ct of all the HPC electrodes are displayed in Table S2 (ESI†).…”

Self-doped N, S porous carbon from semi-coking wastewater-based phenolic resin for supercapacitor electrodes

“…Furthermore, even at a high-power density (6.0 kW kg −1 ), the energy density remains at 7.0 Wh kg −1 . This high energy density makes NSPC/1.2 symmetric supercapacitor comparable to other carbon-based materials for supercapacitors in alkaline electrolytes ( Shao et al, 2017 ; Wang et al, 2018 ; Yang et al, 2018 ; Zhang D. et al, 2019 ; Zhang X. et al, 2019 ; Li et al, 2019 ; Shang et al, 2019 ; Gong et al, 2020 ; Wang et al, 2020 ; Wang et al, 2020 ; Fan et al, 2021 ; Jiang et al, 2021 ; Zhuang et al, 2021 ; Dhakal et al, 2022 ; Han et al, 2022 ), and the main performance parameters are compared in Supplementary Table S4 . These results confirm the feasibility of phenolic wastewater-derived carbon materials for energy storage applications.…”