3D Nitrogen-enriched graphene porous graphene hydrogel for high-performance supercapacitor

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Li, Jing^1 ; Hao, Huilian^1 ; Wang, Jianjun^1 ; Zhang, Yingxiong^1 ; Wei, Donglei^1

College of Material Engineering, Shanghai University of Engineering Science, 333 Long Teng Road, Shanghai

201620, China^1

关键词: Capacitance retention;    Doping agent;    High specific capacitances;    Ion diffusion;    Nitrogen-enriched;    Porous graphene;    Porous structures;    Scalable approach;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/2/022069/pdf
DOI  :  10.1088/1757-899X/490/2/022069

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

3D interconnected porous nitrogen-enriched graphene (NG) hydrogel was fabricated through ethanediamine as reducing and doping agent. The 3D porous structure of the NG enhances the accessibility to ion diffusion. Notably, when the NG material works as binder-free electrode, it achieves a high specific capacitance of 316.8 F g-1 at 0.5 A g-1. After the current density increased 40 folds, it still can reach 173.6 F g-1. 54.8% of capacitance retention can be achieved after the current density increased by 40 folds. This study provides a scalable approach to prepare 3D porous NG hydrosgel.