文献类型：期刊文献

英文题名：Nitrogen-doped two-dimensional porous carbon sheets derived from clover biomass for high performance supercapacitors

作者：Wang, Cunjing[1,3];Wu, Dapeng[1,4];Wang, Hongju[1,2];Gao, Zhiyong[1,4];Xu, Fang[1,2];Jiang, Kai[1,2]

第一作者：Wang, Cunjing;王存景

通讯作者：Wu, DP[1];Gao, ZY[1];Jiang, K[1]

机构：[1]Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China;[2]Henan Normal Univ, Sch Environm, Xinxiang 453007, Henan, Peoples R China;[3]Xinxiang Univ, Sch Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[4]Henan Normal Univ, Henan Key Lab Boron Chem & Adv Energy Mat, Xinxiang 453007, Henan, Peoples R China

第一机构：Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

通讯机构：[1]corresponding author), Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China.

年份：2017

卷号：363

起止页码：375-383

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20173204019747);Scopus(收录号：2-s2.0-85026750931);WOS:【SCI-EXPANDED(收录号:WOS:000411544300044)】；

基金：This work was financial supported by NSFC (Grant Nos. 61204078, 21671059 and U1304505), Program for Changjiang Scholars and Innovative Research Team in University (IRT-17R36). Innovation Scientists and Technicians Troop Construction Projects of Henan Province (154200510009), Program for Innovative Research Team and Individuals (in Science and Technology) in University of Henan Province (18IRTSTHN002, 15HASTIT006, 18HASTIT015), Science and Technology Research Projects of Henan province (162102210268, 162300410174).

语种：英文

外文关键词：Porous carbon; Biomass; Nitrogen doping; Molten salt; Supercapacitor

摘要：Highly porous carbon sheets were prepared from fresh clover stems under air atmosphere via a facile potassium chloride salt-sealing technique, which not only avoids using the high cost inert gas protection but also spontaneously introduce multi-level porosity into the carbon structure taking advantage of the trace of oxygen in the molten salt system. The as-obtained porous carbon sheets possess high specific surface area of 2244 m(2) g(-1) and interconnected hierarchical pore structures from micro-to macro-scale, which provide abundant storage active sites and fast ion diffusion channels. In addition, the spontaneously formed N (2.55 at%) and 0 (6.94 at%) doping sites not only improve the electron conductivity of the electrode but also enhance the specific capacitance by introducing pseudocapacitance. When employed as supercapacitor electrodes, a high specific capacitance of 436 F g(-1) at I A g(-1) and an excellent rate capacity with capacitance remaining 290 F g(-1) at 50 A g(-1) are demonstrated. Furthermore, the assembled symmetric supercapacitor delivers a high specific capacitance of 420 F g(-1) at 0.5 A g(-1), excellent energy density of 58.4 Wh kg(-1) and good cycling stability which retains 99.4% of the initial capacitance at 5 A g(-1) after 30,000 cycles. (C) 2017 Elsevier B.V. All rights reserved.