Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 58, Issue 11, Pages 4487-4494Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b00222
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Funding
- China Postdoctoral Science Foundation [2017M620084, 2018T110187]
- Science Foundation of China University of Petroleum, Beijing [2462018YJRC009, 2462017YJRC051, C201603]
- National Natural Science Foundation of China [21776308, 21576289]
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A facile yet rational strategy is highly desired for the synthesis of high-value-added carbon materials from cheap petroleum asphalt. Here, we develop an in situ texturing strategy for the synthesis of nitrogen and sulfur codoped hierarchical porous graphene nanosheets (N,S-hPGNs) by using dual-functional graphitic carbon nitride templates. The synthetic strategy avoids using additional sulfur sources and a cumbersome acid washing process. The well-developed pores and abundant heteroatoms endow the N,S-hPGNs with a high capacity of 302 F g(-1) at 1 A g(-1) and an excellent cycling stability. Moreover, the as-fabricated supercapacitors display a high energy density of 10.42 Wh kg(-1) at the power density of 250 W kg(-1), outperforming other previous carbon materials from petroleum asphalt. This work not only demonstrates the great potential of N,S-hPGNs for supercapacitors, but also provides a new avenue for the high-value-added utilization of petroleum asphalt.
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