Synthesis of N-doped carbon nanosheets from collagen for electrochemical energy storage/conversion systems

Porous and high electronic conductivity nitrogen-doped nano-sheet carbon derived from polypyrrole for high-power supercapacitors

“…Recent research indicates that nitrogen doping seems to be the most promising method for enhancing capacitance while keeping the superb cycling stability of carbon material. Moreover, it is discovered that the electronic conductivity can also be improved by nitrogen doping [32,35]. To date, there are two common strategies utilized to incorporate nitrogen atoms into carbon materials: (1) post treatment of the porous carbon with nitrogen rich reagents such as urea [36], ammonia [37], and nitrogen gas [38]; (2) in situ doping by carbonizing nitrogen-rich synthetic polymers or organic carbon precursors [11,12,[39][40][41], such as polyacrylonitrile [39], formaldehyde resins [40], and egg white [41].…”

Carbon Nanosheets: Synthesis and Application

“…Collagen, which is the mosta bundant protein in mammals, was cross-linked with paraformaldehyde and subsequently heatedi navacuum at 800 8C; this resulted in nitrogen-doped CNSs with ah igh specific surface area of 695 m 2 g À1 . [59] Ta king advantage of the cross-linked organization of polymers in the peat moss cell wall, CNSs with highly ordered pseudographitic structures and dilated graphene interlayer spacingw erep repared from peat moss;s ufficient porosity (specific surface area of 369 m 2 g À1 ;p ore volume of 0.26 cm 3 g À1 )i nt he CNSs could be developed by air activation at 300 8C. The intrinsically open macroporouss tructure of the peat moss resulted in sheet-like walls in the post-pyrolyzed carbons that were as thin as 60 nm.…”

Electrode Materials with Pseudocapacitive Properties

“…A great enhancement in capacitance can also be reached by using different types of faradaic reactions originating from the presence of oxygen and nitrogen heteroatoms in the carbon network [53][54][55][56][57][58][59][60][61][117][118][119][120][121]. Such pseudocapacitive effects additionally accompany the typical electrical double-layer charging, and they can be connected with quick faradaic reactions of suitable functional groups and also with a local modification of the electronic structure of the doped carbon.…”