Study on Electrochemical Energy Storage Characteristics of Three-dimensional Porous Graphene in Supercapacitor

Haiyan Yu

《International Core Journal of Engineering》 8卷8期 (2022/08) Pp. 682-689

https://doi.org/10.6919/ICJE.202208_8(8).0093

摘要

In this paper, three-dimensional porous graphene materials were prepared and their electrochemical energy storage characteristics in supercapacitors were studied. In other words, three-dimensional graphene materials are prepared by hydrothermal method with graphite oxide as raw material. Then, three-dimensional porous graphene materials were prepared by adjusting the pore structure of three-dimensional graphene by CO2 gas activation. The supercapacitor performance is studied by practical experiments. The results show that when the CO2 activation time is 60 min, the material presents good three-dimensional structure, large specific surface area and stable mesoporous structure. The electrochemical test shows that the capacitance performance is the best when the activation time is 60 min. The specific capacitance of 2 A g-1 can reach 80 F g-1. In addition, the experimental results also show that the three-dimensional porous graphene material has good rate performance and can effectively realize rapid charge and discharge. It is an electrode material with good performance and has great potential in supercapacitors.

關鍵字

Three Dimensional Porous Graphene ； Super Capacitor ； Electrochemistry ； Energy Storage Characteristics

參考文獻

Xue X Y , Ma C H , Cui C X , et al. High lithium storage performance of α-Fe2O3/graphene nanocomposites as lithium-ion battery anodes[J]. Solid State Sciences, 2011, 13(8):1526-1530.

Teng Y , Zhao H , Zhang Z , et al. MoS 2 Nanosheets Vertically Grown on Graphene Sheets for Lithium Ion Battery Anodes[J]. ACS Nano, 2016, 10(9):8526-8535.

Behera, Shantanu, K. Enhanced rate performance and cyclic stability of Fe3O4–graphene nanocomposites for Li ion battery anodesElectronic supplementary information (ESI) available: ESI contains description on the materials synthesis, chemical/electrochemical. [J]. Chemical Communications, 2011.

Ouhib F , Aqil A , Thomassin J M , et al. A facile and fast electrochemical route to produce functional few-layer graphene sheets for lithium battery anode application[J]. Journal of Materials Chemistry A, 2014, 2(37):15298-15302.

Xu L , Sheng P , Chen X , et al. Preparation and Application of Three-dimensional Graphene Nanospheres in Lithium Ion Battery[J]. Journal of Inorganic Materials, 2016, 31(9):976-980.