Premium
Tuning Confined Nanospace for Preparation of N‐doped Hollow Carbon Spheres for High Performance Supercapacitors
Author(s) -
Du Juan,
Liu Lei,
Yu Yifeng,
Hu Zepeng,
Zhang Yue,
Liu Beibei,
Chen Aibing
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201802403
Subject(s) - supercapacitor , materials science , carbon fibers , polyaniline , pyrolysis , chemical engineering , polystyrene , mesoporous material , specific surface area , porosity , coating , spheres , nanotechnology , shell (structure) , capacitance , electrochemistry , microporous material , composite material , electrode , polymerization , composite number , chemistry , organic chemistry , polymer , catalysis , astronomy , engineering , physics
The structural parameters and surface functionalities of hollow carbon spheres are critical for their electrochemical performance. Herein, preparation of N‐doped‐hollow carbon spheres (N‐HCS) with tunable structural parameters and surface properties is reported by using a confined pyrolysis strategy. Polystyrene/polyaniline (PSPAN) was pyrolyzed in a silica shell, which provided a confined nanospace. PSPAN functioned as both the core and a source of carbon and nitrogen. The surface properties and structural parameters of the obtained N‐HCS could be optimized by regulating the pore size of the silica shell. The silica shell coating also prevented agglomeration of the N‐HCS, leading to a regular and well‐distributed spherical morphology. The N‐HCS synthesized in relatively porous conditions had thinner shell, larger mesopore size, higher surface area, and higher nitrogen content and showed excellent electrochemical performance as a supercapacitor with a specific capacitance of 436.5 F g −1 at 0.5 A g −1 .