Biomass-derived porous carbons with tailored graphitization degree and pore size distribution for supercapacitors with ultra-high rate capability
He, Jingjing; Zhang, Deyi; Wang, Yulin; Zhang, Jiwei; Yang, Binbin; Shi, Hao; Wang, Kunjie; Wang, Yi
2020-06-15
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume515
AbstractIt is extraordinarily valuable to develop the supercapacitor with high capacitance retention under ultra-high current density to meet the requirement of fast charging. Herein, porous carbons with tailored graphitization degree and pore size distribution are facilely prepared via controlling the activation temperature of biomass-derived pyrolytic carbon when employing potassium ferrate (K2FeO4) as catalyst and activation agent. The obtained semi-graphitized microporous carbon with a large specific surface area (2208 m(2) g(-1)), high proportion of large micropores (more than 71.8%) and high conductivity (2.38 S cm(-1)) exhibits a perfect balance between the charge storage capacity and rate capability, which specific capacitance reaches 254 and 273 F g(-1) at a current density of 0.5 A g(-1) in KOH and H2SO4 aqueous electrolyte, respectively. Surprising capacitance retention of 86.9% is obtained under an ultra-large current density of 100 A g(-1) for the symmetrical supercapacitor based on the semi-graphitized microporous carbon, and no apparent attenuation was observed after 10,000 cycles. Furthermore, energy density of the assembled symmetrical supercapacitor reaches 7.4 Wh kg(-1) at a power density of 151.4 W kg(-1), and more than 87.8% of energy density is kept even under an ultra-large power density of 29.1 kW kg(-1).
KeywordPorous carbons Tailored graphitization degree Supercapacitor Rate capability
DOI10.1016/j.apsusc.2020.146020
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51462020][21867015]
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000525637300016
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64312
Collection石油化工学院
Corresponding AuthorZhang, Deyi
AffiliationLanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China
First Author AffilicationColl Petrochem Engn
Corresponding Author AffilicationColl Petrochem Engn
First Signature AffilicationColl Petrochem Engn
Recommended Citation
GB/T 7714
He, Jingjing,Zhang, Deyi,Wang, Yulin,et al. Biomass-derived porous carbons with tailored graphitization degree and pore size distribution for supercapacitors with ultra-high rate capability[J]. APPLIED SURFACE SCIENCE,2020,515.
APA He, Jingjing.,Zhang, Deyi.,Wang, Yulin.,Zhang, Jiwei.,Yang, Binbin.,...&Wang, Yi.(2020).Biomass-derived porous carbons with tailored graphitization degree and pore size distribution for supercapacitors with ultra-high rate capability.APPLIED SURFACE SCIENCE,515.
MLA He, Jingjing,et al."Biomass-derived porous carbons with tailored graphitization degree and pore size distribution for supercapacitors with ultra-high rate capability".APPLIED SURFACE SCIENCE 515(2020).
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