期刊
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
卷 32, 期 1, 页码 10-19出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2021.10.008
关键词
Manganese dioxide nanosheets; Graphene; Black phosphorus; Micro-supercapacitor
资金
- Tianjin Natural Science Foundation [18JCZDJC99800, 17JCQNJC00900]
- Major Projects of Science and Technology in Tianjin [18ZXJMTG00020]
- National Natural Science Foundation of China [51502203]
- Tianjin Distinguished Professor Foundation of Young Researcher, Tianjin Development Program for Innovation and Entrepreneurship
In this study, graphene/MnO2 composites were prepared by growing MnO2 nanosheets on the surface of graphene using a water bath method, and the addition of black phosphorus was found to significantly improve the capacitive performance of the material. The fabricated micro-supercapacitor demonstrated high specific capacitance and was integrated with a flexible thin-film pressure sensor for practical applications.
Supercapacitors are widely used for powering flexible/wearable electronics owing to their excellent charge storage capabilities. In this study, MnO2 nanosheets were grown on the surface of graphene using a simple water bath method to prepare graphene/MnO2 composites for fabricating supercapacitors. In addition, two-dimensional black phosphorus was introduced as an additive into the electronic ink based on the as-prepared graphene/MnO2 composites. The characterization and electrochemical analyses results showed that adding black phosphorus considerably improved the capacitive performance of the material, yielding a high specific capacitance of 241.5 F g(-1) at 0.1 A g(-1) and an impressive rate capability improvement from 52.5% to 80.3%. Then the micro-supercapacitor having an area-specific capacitance of 20.15 mF cm(-2) at a scanning rate of 2 mV s(-1) was uti-lized to demonstrate the practical applicability of this material. To further evaluate the practical applicability of this micro-supercapacitor, the micro-supercapacitor was integrated with a flexible thin-film pressure sensor on paper and cloth through screen printing.
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