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- W2676479891 abstract "Ultrahigh graphitized carbon microspheres with rich hierarchical pores (AGHPCM-1) have been successfully synthesized through the one-step activation-carbonization strategy (OACS) with porous sulfonated poly-divinylbenzene as the carbon precursor, iron as the hard template and catalyst, and potassium hydroxide (KOH) as activation agent. Through the XRD, TEM, Raman and BET analysis, AGHPCM-1 shows very high graphitization degree and rich micro-, meso- and macro-pores. More importantly, the mechanism for KOH to improve the graphitization degree of carbon materials in OACS has been illustrated by the thermodynamical theory. The tremendous heat releasing from the reaction between the catalyst precursor of Fe2O3 and potassium vapor plays a key role in the formation of graphitized carbon. It may provide a general direction to prepare highly graphitized porous carbon at a moderate temperature. Integrating the advantages of high graphitization degree and rich hierarchical porous structure, the AGHPCM-1 exhibits an excellent rate performance with a response to up to the high current density of 150 A g−1 and high scan rate of 2000 mV s−1. No obvious capacitance decay can be observed after 10000 charge/discharge cycles even at the high current density of 20 A g−1." @default.
- W2676479891 created "2017-06-30" @default.
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- W2676479891 date "2017-09-01" @default.
- W2676479891 modified "2023-10-16" @default.
- W2676479891 title "Potassium vapor assisted preparation of highly graphitized hierarchical porous carbon for high rate performance supercapacitors" @default.
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- W2676479891 doi "https://doi.org/10.1016/j.jpowsour.2017.06.058" @default.
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