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Abstract:
Nitrogen doped porous carbons are the most attractive electrode materials for supercapacitors due to their large surface area and surface pseudocapacitance. Herein, a nitrogen-doped porous carbon with an ultra-high specific surface area of 3709 m(2) g(-1) is synthesized by a simple one-pot polymerization and calcination process. The porous carbon exhibits both high specific capacitance and excellent rate capability in a wide pH range. High specific capacitances of 304.3, 348.0, 185.4 and 298.0 F g(-1) are achieved for the nitrogen-doped porous carbon in 1 M H2SO4, 6 M KOH, 21 m LiTFSI and 1 M Li2SO4 at 2 mV s(-1), respectively. The symmetrical supercapacitor with this porous carbon as the electrodes can deliver a high energy density of 25.9 Wh kg(-1) at a power density of 339.6 W kg(-1) with an operating cell voltage of 1.7 V in 1 M Li2SO4 electrolyte, and a good cycle stability with 84% of its initial specific capacitance remains after 23,000 cycles. The superior electrochemical properties can be attributed to the large specific surface area, well-defined hierarchical pores, and high level of disorder structure for the N-doped carbon material.
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JOURNAL OF POWER SOURCES
ISSN: 0378-7753
Year: 2021
Volume: 491
9 . 7 9 4
JCR@2021
8 . 1 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:142
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 37
SCOPUS Cited Count: 37
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0