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

Sun, Yanzhi; Guo, Shicheng; Li, Wei; Pan, Junqing; Fernandez, Carlos; Senthil, Raja Arumugam; Sun, Xueliang

Abstract

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 gˉ¹at 1 A gˉ¹, and it can retain 72.2% even at the current density of 50 A gˉ¹. In addition, the porous carbon provides excellent durability of 50,000 cycles at 50 A gˉ¹ 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.

Citation

SUN, Y., GUO, S., LI, W., PAN, J., FERNANDEZ, C., SENTHIL, R.A. and SUN, X. 2018. A green and template-free synthesis process of superior carbon material with ellipsoidal structure as enhanced material for supercapacitors. Journal of power sources [online], 405, pages 80-88. Available from: https://doi.org/10.1016/j.jpowsour.2018.10.034

• Journal Article Type: Article
• Acceptance Date: Oct 9, 2018
• Online Publication Date: Oct 14, 2018
• Publication Date: Nov 30, 2018
• Deposit Date: Oct 25, 2018
• Publicly Available Date: Oct 15, 2019
• Journal: Journal of power sources
• Print ISSN: 0378-7753
• Electronic ISSN: 1873-2755
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 405
• Pages: 80-88
• DOI: https://doi.org/10.1016/j.jpowsour.2018.10.034
• Keywords: 3D materials; Porous carbon; Super capacitor; Template free; Metal organic frameworks
• Public URL: http://hdl.handle.net/10059/3192