Potassium Humate Carbon Derived from Chlorination Roast Quenching of Municipal Sludge for High-performance Supercapacitor Electrodes

Soybean protein-derived N, O co-doped porous carbon sheets for supercapacitor applications

“…2c), the centers of which are at 2y angles of 241 and 431 corresponding to the diffraction of the (002) and (101) lattice planes, respectively, indicating the characteristics of amorphous carbon. 4 For the Raman spectra (Fig. 2d), the two obvious fitted peaks at about 1315 cm À1 (D band) and 1590 cm À1 (G band) can be observed in all the samples, which reflects the disordered and imperfect structure and graphitic layers of carbon materials.…”

“…3 Among them, supercapacitors (SCs) show great potential, particularly due to their intrinsic features of fast charge/discharge speed, high power density, superior cycling performance, high-level safety and easy maintenance. [4][5][6] For SCs, their performance greatly relies on the electrode materials, since the charges are stored and released through the adsorption and desorption of ions in the electrode materials. On account of this, carbonaceous materials, especially porous carbon materials, have been explored and widely applied as electrode materials attributed to their large specific surface area, adjustable pore structures and good electrical conductivity.…”

Progress in the use of organic potassium salts for the synthesis of porous carbon nanomaterials: microstructure engineering for advanced supercapacitors

“…9g). 70 It was found that NaCl reduced the activation energy required for carbonization, and secondary pyrolysis favored the formation of pyridinic-N and pyrrolic-N (2.06 at%). The HRTEM image showed that HA-K-650-M-Q had a pan-graphite crystal structure (Fig.…”

“…Most OPSs including but not limited to potassium acetate/citrate/tartrate/gluconate/humate/benzoate/biphthalate/alginate fall into this category. 65,66,70,183–187 During the pyrolysis process, molecularly dispersed potassium carbonate is formed in situ and nanopores are generated effectively. In this way, PCNs with SSAs of 1410 m 2 g −1 to 3179 m 2 g −1 can be obtained by only one simple step, avoiding the introduction of large amounts of external corrosive chemical agents.…”

Dimensional engineering of anode materials for high performance potassium ion hybrid capacitor—A review

“…Homogenous 3D carbon material is the first material studied for PIHC and as a conductive scaffold, because its structure is intertwined, not only can form the required layered porous channel, but also has high conductivity and better structural mechanical stability 109,110 . In addition, the preparation method of carbon material is simple, the difficulty of obtaining raw materials is low, and through the recycling of urban waste, a large number of PIHC anode material works based on carbon material has been carried out 15,111‐114 …”