Molten salt synthesis of hierarchical porous carbon from wood sawdust for supercapacitors

Recent advancement of biomass-derived porous carbon based materials for energy and environmental remediation applications

“…The authors investigated the effect of different compounding ratios of KCl and KOH on the carbon morphology such that a maximum surface area of 1998 m 2 g −1 was achieved along with large number of micropores and mesopores. 125 Similarly, KNO 3 modified KCl–LiCl molten salt was explored for fabrication of N-doped carbon nanosheets using agar precursor. The obtained AC exhibited high surface area (1376 m 2 g −1 ), high microporosity (72%) and high N-doping content (4 at%).…”

Direct Coating Pen Ink Carbon on a Carbonized Melamine Sponge as a Flexible Free-Standing Electrode

“…The energy density (E t , μWh/cm 2 ) and power density (P t , μW/cm 2 ) were calculated according to the equations E t = C t × (ΔV) 2 /(2 × 3.6) and P t = E t /Δt × 3600, respectively, where C t (mF/cm 2 ) refers to the specific capacitance of the two-electrode system. 30 The symmetric all-solid-state supercapacitor device was assembled by pressing two slices of CMS@ink with poly(vinyl alcohol) (PVA)/KOH as the gel electrolyte and separator and nickel foam as the current collector. The PVA/KOH gel electrolyte was prepared as follows: 2 g of PVA was dissolved in 20 mL of deionized water to obtain a transparent solution under stirring at 90 °C.…”

“…The specific capacitance was calculated for the single electrode using the equation C S = 2 × ( I / S ) /(Δ V /Δ t ). The energy density ( E t , μWh/cm 2 ) and power density ( P t , μW/cm 2 ) were calculated according to the equations E t = C t × (Δ V ) 2 /(2 × 3.6) and P t = E t /Δ t × 3600, respectively, where C t (mF/cm 2 ) refers to the specific capacitance of the two-electrode system . The symmetric all-solid-state supercapacitor device was assembled by pressing two slices of CMS@ink with poly­(vinyl alcohol) (PVA)/KOH as the gel electrolyte and separator and nickel foam as the current collector.…”

Three‐dimensional nanoporous activated carbon electrode derived from acacia wood for high‐performance supercapacitor

“…The Frontiers in Chemistry frontiersin.org 10 Frontiers in Chemistry frontiersin.org specific capacitance for symmetric supercapacitor is used to determine the energy and power densities in the Ragone plot of AWC-K//AWC-K, revealed that a high energy density of 23.98 Wh kg −1 at the 450 W kg −1 , and 13.41 Wh kg −1 with 7200 W kg −1 power density (Figure 7B). The energy density of SSC in this work (AWC-K//AWC-K) was calculated to be higher than that of other similar supercapacitors, such as LMCN-2// LMCN-2 (20.7 Wh kg −1 ) (Liang et al, 2020), N-HCNs-800// N-HCNs-800 (17.92 Wh kg −1 ) (Peng et al, 2021), SAC-4//SAC-4 (16.1 Wh kg −1 ) (Su et al, 2018), HPC-700//HPC-700 (14.40 Wh kg −1 ) (Zhao et al, 2020), LSC800//LSC800 (12.5 Wh kg −1 ) (Liu et al, 2016), AC1//AC1 (11.00 Wh kg −1 ) (Zhu et al, 2018), HLPC//HLPC (9.4 Wh kg −1 ) (Liang et al, 2014), HPCR-800// HPCR-800 (6.77 Wh kg −1 ) (Fang et al, 2019), and CS-H3//CS-H3 (5.63 Wh kg −1 ) (Yang et al, 2020), see (Table 2).…”