A green and template-free synthesis process of superior carbon material with ellipsoidal structure as enhanced material for supercapacitors

JOURNAL OF POWER SOURCES

卷:405

Article

Sun, Yanzhi¹  Guo, Shicheng¹  Li, Wei^2,3  Pan, Junqing¹  Fernandez, Carlos⁴  Senthil, Raja Arumugam¹  Sun, Xueliang⁵ 

[1] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing Engn Ctr Hierarch Catalysts, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Univ Houston, Dept Engn Technol, Houston, TX 77204 USA

[3] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA

[4] Robert Gordon Univ, Sch Pharm & Life Sci, Aberdeen AB10 7GJ, Scotland

[5] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada

关键词: 3D materials;    Porous carbon;    Supercapacitor;    Template free;    Metal organic frameworks;   

DOI  :  10.1016/j.jpowsour.2018.10.034

来源: Elsevier

【 摘 要 】

Metal Organic Frameworks or related carbon materials are the ideal materials for supercapacitors due to their high surface area and unique porous structure. Here, we propose a new green and recyclable synthesis method of porous carbon. Aluminum hydroxide (Al(OH)(3)) and trimesic acid (BTC) are employed as raw materials to obtain aluminium trimesic (denoted as Al-BTC) via their covalent reaction. Then, the porous carbon is obtained through carbonization and dissolving process to remove the aluminum oxide (Al2O3). Al(OH)(3) is recovered by the Bayer method for the next batch. The SEM images show that the porous carbon has rugby-like morphology with the same of 400 nm wide and 1000 nm long which indicates the porous carbon with c/a ratio of 2.5 providing the largest specific volume surface area. The sample offers 306.4 F g(-1) at 1 A g(-1), and it can retain 72.2% even at the current density of 50 A g(-1). In addition, the porous carbon provides excellent durability of 50,000 cycles at 50 A g(-1) with only 5.05% decline of capacitance. Moreover, the porous carbon has an ultrafast charge acceptance, and only 4.4 s is required for one single process, which is promising for application in electric vehicles.

【 授权许可】

Free