正硅酸乙酯
乙二胺
介孔材料
材料科学
溴化铵
苯酚
聚合
碳纤维
化学工程
原位聚合
高分辨率透射电子显微镜
超级电容器
高分子化学
复合材料
纳米技术
电极
复合数
电化学
有机化学
化学
催化作用
聚合物
透射电子显微镜
物理化学
工程类
肺表面活性物质
作者
Jiangfeng Du,Aibing Chen,Lei Liu,Bo Li,Yue Zhang
出处
期刊:Carbon
[Elsevier]
日期:2020-04-01
卷期号:160: 265-272
被引量:57
标识
DOI:10.1016/j.carbon.2020.01.018
摘要
A co-assembly approach has been developed to controllably fabricate N-doped hollow mesoporous carbon spheres (N-HMCS) with different morphologies. Cetyl-3-methyl ammonium bromide and tetraethyl orthosilicate (TEOS) are applied to co-assemble with polybenzoxazines (phenol/formaldehyde/ethylenediamine (PB) resin) through electrostatic interaction. The utilization of ethylenediamine (EDA) is to introduce nitrogen into N-HMCS and catalyze hydrolysis of the silica precursor and polymerization of PB. The increasing amount of EDA leads to different morphologies of N-HMCS, changing from irregular particle aggregates to hollow spheres with increasing in diameter by controlling the hydrolysis rate of TEOS. In addition, pre-polymerization of phenol/formaldehyde oligomer is another key factor for the formation of N-HMCS, which is proved by the irregular porous particles obtained by direct assembly of phenol, formaldehyde and EDA. The different morphologies in N-HMCS show variable electrochemical performance when using as electrode materials in supercapacitor. Typically, N-HMCS with regular spherical morphology, small diameter and thin shell shows better performance, proving its excellent prospects in energy storage.
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