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Monodisperse Ultrahigh Nitrogen‐Containing Mesoporous Carbon Nanospheres from Melamine‐Formaldehyde Resin
Author(s) -
Guo Dingyi,
Fu Yubin,
Bu Fanxing,
Liang Haichen,
Duan Linlin,
Zhao Zaiwang,
Wang Changyao,
ElToni Ahmed Mohamed,
Li Wei,
Zhao Dongyuan
Publication year - 2021
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.202001137
Subject(s) - dispersity , mesoporous material , materials science , melamine , pyrolysis , carbon fibers , chemical engineering , polymerization , polymer , nitrogen , polymer chemistry , organic chemistry , chemistry , catalysis , composite number , engineering , composite material
An aqueous emulsion polymerization self‐assembly approach is demonstrated for the first time to synthesize ultrahigh nitrogen containing mesoporous polymer nanospheres, using melamine‐formaldehyde resin oligomers as precursors. In the synthesis, change from alkaline to acidic conditions is critical for the formation of monodisperse mesostructured polymer nanospheres. Owing to unique structure of triazine stabilized in the covalent polymeric networks during the pyrolysis process, the derived mesoporous carbon nanospheres possess an ultrahigh nitrogen content (up to 15.6 wt%) even after pyrolysis at 800 °C, which is the highest nitrogen content among mesoporous carbon nanospheres. Furthermore, these monodisperse mesoporous carbon nanospheres possess a high surface area (≈883 m 2 g −1 ) and large pore size (≈8.1 nm). As an anode for sodium‐ion batteries, the ultrahigh nitrogen‐containing mesoporous carbon nanospheres exhibit superior rate capability (117 mAh g −1 at a high current density of 3 A g −1 ) and high reversible capacity (373 mAh g −1 at 0.06 A g −1 ), indicating a promising material for energy storage.