Tuning capacitance of graphene films via a robust routine of adjusting their hierarchical structures
Fei Dang, Pengfei Yang, Wei Zhao, Jefferson Zhe Liu, Huaping Wu, Aiping Liu, Yilun Liu
ELECTROCHIMICA ACTA | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2019
In this work, the nitrogen doped graphene films with hierarchical network structures have been successfully fabricated via a robust routine of adjusting the content of large- and small-sized reduced graphene oxide (RGO) sheets in the graphene films, where the large-sized RGO sheets act as the backbone to form the well-connected network structures and small-sized RGO sheets act as the interlayer and interpore linkers to connect the large-sized RGO sheets and large pores. A maximum capacitance of 429.7 F g −1 is obtained for the optimized RGO electrode with small-sized RGO content of 40 wt%, which is 61.9% improvement compared to the RGO electrodes with pure large-sized RGO sheets. While, the ..View full abstract
Awarded by National Key Research and Development Program of China
Awarded by National Natural Science Foundation of China
The authors acknowledge the financial support from the National Key Research and Development Program of China (No. 2016YFB0700300) and National Natural Science Foundation of China (No. 11572239).