文献类型：期刊文献

英文题名：Biomass-Derived Porous Carbon with a Good Balance between High Specific Surface Area and Mesopore Volume for Supercapacitors

作者：Wang, Yanbo[1,2];Chen, Yiqing[3];Zhao, Hongwei[1];Li, Lixiang[1];Ju, Dongying[3];Wang, Cunjing[2];An, Baigang[1,3]

第一作者：王用斌;Wang, Yanbo

通讯作者：An, BG[1];Wang, CJ[2];An, BG[3]

机构：[1]Univ Sci & Technol Liaoning, Sch Chem Engn, Key Lab Energy Mat & Electrochem Res Liaoning Pro, Anshan 114051, Peoples R China;[2]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China;[3]State Key Lab Met Mat Marine Equipment & Applicat, Anshan 114009, Peoples R China

第一机构：Univ Sci & Technol Liaoning, Sch Chem Engn, Key Lab Energy Mat & Electrochem Res Liaoning Pro, Anshan 114051, Peoples R China

通讯机构：[1]corresponding author), Univ Sci & Technol Liaoning, Sch Chem Engn, Key Lab Energy Mat & Electrochem Res Liaoning Pro, Anshan 114051, Peoples R China;[2]corresponding author), Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China;[3]corresponding author), State Key Lab Met Mat Marine Equipment & Applicat, Anshan 114009, Peoples R China.|[11071]新乡学院;

年份：2022

卷号：12

期号：21

外文期刊名：NANOMATERIALS

收录：;Scopus(收录号：2-s2.0-85141837099);WOS:【SCI-EXPANDED(收录号:WOS:000884009900001)】；

基金：This research was supported by National Natural Science Foundation of China (51672118, 51672117, 51972156, 51872131, and 51902278) and the Joint Fund projects of the University of Science and Technology Liaoning State-Key Laboratory of Metal Material (No. HGSKL-USTLN (2020)08).

语种：英文

外文关键词：biomass; porous carbon; supercapacitors; mesopore-micropore; salt template

摘要：Porous carbon has been one desirable electrode material for supercapacitors, but it is still a challenge to balance the appropriate mesopore volume and a high specific surface area (SSA). Herein, a good balance between a high SSA and mesopore volume in biomass-derived porous carbon is realized by precarbonization of wheat husk under air atmosphere via a chloride salt sealing technique and successive KOH activation. Due to the role of molten salt generating mesopores in the precarbonized product, which can further serve as the active sites for the KOH activation to form micropores in the final carbon material, the mesopore-micropore structure of the porous carbon can be tuned by changing the precarbonization temperature. The appropriate amount of mesopores can provide more expressways for ion transfer to accelerate the transport kinetics of diffusion-controlled processes in the micropores. A high SSA can supply abundant sites for charge storage. Therefore, the porous carbon with a good balance between the SSA and mesopores exhibits a specific gravimetric capacitance of 402 F g(-1) at 1.0 A g(-1) in a three-electrode system. In a two-electrode symmetrical supercapacitor, the biomass-derived porous carbon also delivers a high specific gravimetric capacitance of 346 F g(-1) at 1.0 A g(-1) and a good cycling stability, retaining 98.59% of the initial capacitance after 30,000 cycles at 5.0 A(-1). This work has fundamental merits for enhancing the electrochemical performance of the biomass-derived porous carbon by optimizing the SSA and pore structures.