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 | |
发表期刊 | APPLIED SURFACE SCIENCE |
ISSN | 0169-4332 |
卷号 | 515 |
摘要 | It 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). |
关键词 | Porous carbons Tailored graphitization degree Supercapacitor Rate capability |
DOI | 10.1016/j.apsusc.2020.146020 |
收录类别 | SCI ; SCIE ; EI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[51462020][21867015] |
WOS研究方向 | Chemistry ; Materials Science ; Physics |
WOS类目 | Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter |
WOS记录号 | WOS:000525637300016 |
出版者 | ELSEVIER |
EI入藏号 | 20201108284355 |
EI主题词 | Pore size |
EI分类号 | 701.1 Electricity: Basic Concepts and Phenomena - 702 Electric Batteries and Fuel Cells - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science |
来源库 | WOS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/64312 |
专题 | 石油化工学院 |
通讯作者 | Zhang, Deyi |
作者单位 | Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China |
第一作者单位 | 石油化工学院 |
通讯作者单位 | 石油化工学院 |
第一作者的第一单位 | 石油化工学院 |
推荐引用方式 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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