N-doped hollow mesoporous carbon spheres by improved dissolution-capture for supercapacitor

Publication date: Available online 2 October 2019Source: CarbonAuthor(s): Juan Du, Yue Zhang, Haixia Wu, Senlin Hou, Aibing ChenAbstractN-doped hollow mesoporous carbon sphere (N-HMCS) has attracted increasing attention as supercapacitor materials due to its rich mesoporous structure, large cavity, high surface area and suitable N-doping, etc. Herein, an improved dissolution-capture method is applied for preparation of N-HMCS using 3-aminophenol-formaldehyde (AF) resin spheres as carbon precursor. In this process, AF resin spheres preparation, mesoporous silica coating, dissolution-capture are implemented by one-pot process without multiple separation operation, which is beneficial for large-scale preparation. Mesoporous silica shell is in-situ coated on the surface of AF resin spheres, and AF oligomer, which is dissolved in N, N-dimethylformamide, is captured by mesopores on the silica shell. The obtained N-HMCS exhibits a relatively regular spherical shape, carbon shell with rich mesoporous, high surface area and nitrogen doping. As electrode materials in supercapacitor, the N-HMCS shows outstand performance with a high capacitance and a good capacitance retention, indicating its excellent promising in energy storage.Graphical abstractN-doped hollow carbon spheres with high performance in supercapacitor benefiting from its relative uniform and dispersed spherical morphology, carbon shell with rich mesoporous, high surface area and nitrogen doping are prepared by improved di...
Source: Carbon - Category: Materials Science Source Type: research