Cagelike porous sulfonated polystyrene@polyaniline composite microspheres for high-performance supercapacitor
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The development of novel high-performance electrode materials has become increasingly urgent due to the broad demands on the large-capacity energy storage devices nowadays. In this work, cagelike porous sulfonated polystyrene (cSPS) microspheres are first synthesized as the skeleton structure templates, on which polyaniline (PANI) nanoparticles with a size of about 30 nm are loaded through the in situ polymerization of aniline. The novel cSPS-supported PANI composite microspheres (cSPS@PANI) possess hierarchical meso-/macroporous structure, and their BET specific surface area and pore volume reach the maximum at a moderate PANI mass fraction. The electrochemical performance of cSPS@PANI composite microspheres was evaluated through a three-electrode system with 1 M H2SO4 as the electrolyte. The specific capacitance of the cSPS@PANI composite microspheres can reach as high as 374 F g−1 at a current density of 1 A g−1, and only 11.8% is lost after 500 charge/discharge cycles. Thus, the cSPS@PANI composite microspheres can be potentially used as one of the novel outstanding electrode materials in the fabrication of high-performance energy storage devices.
This work was supported by the National Natural Science Foundation of China (Nos. 51573174, 51473152, and 51773189) and the Fundamental Research Funds for the Central Universities (WK2060200012, WK3450000001).
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Conflicts of interest
The authors declare no conflict of interest.
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