Preparation and electrochemical capacitance performance of phosphorus-doped hollow carbon spheres

• Main Authors: LI Zhong-yu, LI Yun-tong, WU Wen-qian, LIU Ling, PENG Chao-hua, YUAN Cong-hui, DAI Li-zong
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2020-03-01
• Series: Journal of Materials Engineering
• Subjects: friedel-crafts reaction; phosphorus-doped; hollow carbon sphere; activation; capacitance performance
• Online Access: http://jme.biam.ac.cn/CN/Y2020/V48/I3/105

Hollow polymer spheres (HPS) were firstly prepared through a hydrothermal method using phenolic precursor and styrene as starting materials.HPS was treated with phosphorous trichloride <i>via</i> a Friedel-Crafts reaction to obtain phosphorus-containing cross-linked polymer.After carbonization and KOH activation,P-doped hollow porous carbon spheres (AP-HCS) were prepared.FT-IR,TG,SEM,TEM,Raman,BET and XPS, and so on, were used to characterize the composition,structure and morphology of polymer and carbon spheres.The capacitance performance was also tested in 1 mol/L H₂SO₄electrolyte.The results show that AP-HCS has specific surface area of 2177 m²/g,exhibits good capacitance performance of 288 F/g at the current density of 1 A/g.After charging and discharging for 5000 times at the current density of 5 A/g,the 88.9% capacity is retained, showing good capacitance performance.