Hierarchical porous carbon for high-performance capacitor derived from sewage sludge by KHCO3 activation

Sustainable hydrothermal carbon for advanced electrochemical energy storage

“…264 It is also veried that the N-containing functional groups on hydrochar can improve its hydrophilic characteristics and increase its Faraday pseudocapacitance. 294 Surface doping and modication can be easily realized by introducing heteroatoms such as N, O, P, S, and B, which can improve the wettability of the electrolyte on the surface of functionalized hydrochar (electrode) and enhance the electron transfer capacity and pseudocapacity. 274,276 Heteroatom-doped carbon materials can be synthesized either by in situ doping during the hydrothermal process or through post-treatment with heteroatom-containing precursors.…”

“…264 It is also verified that the N-containing functional groups on hydrochar can improve its hydrophilic characteristics and increase its Faraday pseudocapacitance. 294…”