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- W2045193003 abstract "Abstract Hierarchical porous carbon (HPC) has been synthesized using sulfonated pitch as a precursor with a simple KOH activation process. Sulfonated pitch has a high content of oxygen-containing groups which enable it to be easily wetted in KOH solution and facilitate the activation process. The effect of the activation agent to precursor ratio on the porosity and the specific surface area is studied by nitrogen adsorption–desorption. A maximum specific surface area of 3548 m 2 g −1 is achieved with a KOH to sulfonated pitch ratio of 3 and this produces a structure with micro-, meso- and macropores. Among the various HPC samples, the sample prepared with an activation agent to precursor ratio of 1.5 exhibits the best electrochemical performance as an electrode in an electrical double layer capacitor (EDLC) in 6 M KOH electrolyte. Its gravimetric specific capacitance is 157 F g −1 at a current density of 100 A g −1 and it has a capacitance retention ratio of 98.4% even after 10,000 cycles. The sample also presents outstanding electrochemical performance in 1 M Li 2 SO 4 and 1 M TEA BF 4 /PC electrolytes. Thus, HPC derived from sulfonated pitch is a promising electrode material for EDLCs." @default.
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- W2045193003 date "2014-04-01" @default.
- W2045193003 modified "2023-10-08" @default.
- W2045193003 title "Hierarchical porous carbon derived from sulfonated pitch for electrical double layer capacitors" @default.
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- W2045193003 doi "https://doi.org/10.1016/j.jpowsour.2013.11.114" @default.
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