文献类型：期刊文献

英文题名：A green and scalable route to yield porous carbon sheets from biomass for supercapacitors with high capacity

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];Jiang, K[1];Jiang, K[2];Wu, DP[3]

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

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

年份：2018

卷号：6

期号：3

起止页码：1244-1254

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20180404679210);Scopus(收录号：2-s2.0-85040941678);WOS:【SCI-EXPANDED(收录号:WOS:000422949700056)】；

基金：This work is supported by the National Natural Science Foundation of China (61176004, 61204078, U1304505, 21671059 and 51772078), Program for Changjiang Scholars and Innovative Research Team in University (IRT-17R36), 111 project (D17007), Innovation Scientists and Technicians Troop Construction Projects of Henan Province (154200510009), Program for Innovative Research Team and Individuals (in Science and Technology) in the University of Henan Province (18IRTSTHN002, 15HASTIT006, and 18HASTIT015), Science and Technology Research Projects of Henan Province (162102210268 and 162300410174).

语种：英文

外文关键词：Biomass - Capacitance - Carbon - Chemical reactions - Electrodes - Electrolytes - Etching - Inert gases - Porosity - Porous materials - Potassium hydroxide - Scalability - Sodium chloride - Zinc chloride

摘要：A green and scalable route is developed to prepare hierarchical porous carbon sheets (HPCS) from biomass (cornstalk) directly under an air atmosphere instead of inert gas protection. In addition, the method adopts non-toxic NaCl and KCl mixed salt as reaction media to regulate the activation process, which avoids the corrosive and poisonous KOH and ZnCl2 reagents. Meanwhile, the porous structures of HPCS can be well-manipulated by the salt templates and the etching effects of the oxygen atom as well as the high energy molten salt media. The as-obtained HPCS consist of an ultra-thin sheet structure (similar to 4.6 nm in thickness) and abundant hierarchical pores, which facilitates electrolyte diffusion and ion transfer. In addition, the high specific surface area of 1588 m(2) g(-1) provides sufficient active sites and the rich O doping introduces pseudocapacitance. Therefore, the as-prepared HPCS exhibit a high specific capacitance of 407 F g(-1) at 1 A g(-1) in a three-electrode system. Moreover, the assembled symmetric supercapacitor in a two-electrode system also exhibits an outstanding specific capacitance of 413 F g(-1) at 0.5 A g(-1), an excellent rate capacity and a long-term cycling stability with 92.6% of initial capacitance retention after 20 000 cycles at 5 A g(-1), which are comparable to those of the porous carbons activated with traditional methods. It is expected that this green and facile technique could serve as an effective and scalable method to prepare optimized HPCS with tunable porous structures from biomass for electrochemical energy storage applications.