Nanospace due to the presence of boron and nitrogen in carbon films prepared from polyimide

High capacitance B/C/N composites for capacitor electrodes synthesized by a simple method

“…5(c)). The peak I of B and N components is assigned to >B-N< bond present in BSU [12,14] or boron nitride [22]. The peaks II and III of B component are assigned to C-B-O type [12,14] and oxide (and/or hydroxide) [14,22] C components is nearly the same for all composites.…”

“…The peak I of B and N components is assigned to >B-N< bond present in BSU [12,14] or boron nitride [22]. The peaks II and III of B component are assigned to C-B-O type [12,14] and oxide (and/or hydroxide) [14,22] C components is nearly the same for all composites. There may be two reasons that the total fraction of the surface functional groups, C-OH, C=O, and C(=O)OH, (C II + C III + C IV) does not change very much by HTT: one is that the measured proportion is intrinsic to these composites, and the other the results were brought about by the leveling effect due to boiling in water.…”

“…We have reported that when boron is added to the carbon precursors containing nitrogen, the decrease in W N due to high HTT is significantly moderated with the formation of >B-N< bond in the basic structural unit, BSU, of carbon [12][13][14]. Nitrogen doping into the carbon hexagonal structure causes slight distortion of the hexagonal plane [15] and also imbalanced distribution of the net charges on carbon and nitrogen atoms in the plane [14,15].…”

“…Nitrogen doping into the carbon hexagonal structure causes slight distortion of the hexagonal plane [15] and also imbalanced distribution of the net charges on carbon and nitrogen atoms in the plane [14,15]. The extent of uneven charge distribution becomes larger by the presence of >B-N< bond than the substituted nitrogen [14].…”

Computer aided-molecular design of high performance nano-carbon materials: Na+ on graphenes

“…Amorphous carbon materials have potential to accommodate a variety of chemical species on both surface and edge regions of the carbon nano-sheet [1][2][3][4][5][6][7]. A theoretical maximum capacity of normal graphite material for lithium ion (LiC 6 ) is 372 mAh/g, whereas the amorphous carbon materials have remarkably high capacities (500-1100 mAh/g).…”