新型炭材料2021，Vol.36Issue(3)：594-605,12.DOI:10.1016/S1872-5805(21)60062-8
界面自组装构筑空心多孔石墨化炭球及其电化学性能
An interfacial self-assembly strategy to fabricate graphitic hollow porous carbon spheres for supercapacitor electrodes
摘要
Abstract
Graphitic hollow porous carbon spheres (GHPCSs) have the advantages of a unique cavity structure, high surface area and excellent conductivity, and are promising electrode materials for energy storage. A Fe–tannic acid (TA) framework synthesized using TA as the carbon source and K3 [Fe(C2O4)3] as a complexing agent, was self-assembled onto a melamine foam, which was con-verted to GHPCSs by carbonization, where the K3 [Fe(C2O4) 3] also acts as an activating-graphitizing agent. The outer shell of the as-prepared GHPCSs has a large specific surface area, a micropore-dominated structure and excellent electrical conductivity, which en-sure a large enough active surface area for charge accumulation and fast ion/electron transport in the partially graphitized carbon framework and pores. The optimum GHPCS has a high capacitance of 332.7 F g-1 at 1 A g-1. An assembled symmetric supercapacit-or has a high energy density of 23.7 Wh kg-1 at 459.1 W kg-1 in 1 mol L-1 Na2SO4. In addition, the device has long-term cycling sta-bility with a 92.1％ retention rate after 10000 cycles. This study not only provides an economic and time-saving approach for con-structing GHPCSs by a self-assembly method, but also optimizes ion/electron transport in the carbon spheres to give them excellent performance in capacitive energy storage.关键词
空心炭球/石墨化/单宁酸/超级电容器Key words
Hollow carbon sphere/Graphitization/Tannic acid/Supercapacitor分类
化学化工引用本文复制引用
张晓华,甘欣雨,刘宝胜,闫晓燕,赵新新..界面自组装构筑空心多孔石墨化炭球及其电化学性能[J].新型炭材料,2021,36(3):594-605,12.基金项目
The Scientific and Technological Innovation Pro-grams of Higher Education Institutions in Shanxi(No.2020L0330),the Award Fund for Outstanding Doc-tors in Shanxi Province(No.20202075)and the Doc-tor Funds of Taiyuan University of Science and Tech-nology(No.20192054). 山西省高等学校科技创新项目(2020L0330) （No.2020L0330）
太原科技大学博士科研启动基金(20192054) （20192054）
山西省来晋工作优秀博士科研资助基金(20202075). （20202075）
