MoO2 nanoparticles confined in N,P-codoped graphene aerogels with excellent pseudocapacitance performance

• Published in: Canadian journal of chemistry Vol. 99; no. 3; pp. 303 - 310
• Main Authors: Chen, Jianfa, Jin, Tianxiang, Deng, Hangchun, Huang, Jie, Ren, Guangyuan, Qian, Yong
• Format: Journal Article
• Language: English
• Published: 1840 Woodward Drive, Suite 1, Ottawa, ON K2C 0P7 NRC Research Press 2021; Canadian Science Publishing NRC Research Press
• Subjects: Aerogels; aérogels de graphène codopés à l’azote et au phosphore; Capacitance; Electrochemical analysis; Electrochemistry; Flux density; Graphene; Molybdenum oxides; MoO; MoO2; nanocomposite; Nanocomposites; Nanoparticles; NP-codoped graphene aerogels; Roasting; supercapacitor; supercondensateur; Synergistic effect
• ISSN: 0008-4042; 1480-3291
• DOI: 10.1139/cjc-2020-0283

In this work, MoO 2 @NPGA nanocomposites were successfully prepared via a simple hydrothermal and calcination route. The as-prepared MoO 2 @NPGA composites exhibit a synergistic effect between MoO 2 and N,P-codoped graphene aerogels, which can significantly improve the electrochemical performance of the MoO 2 @NPGA electrodes. Moreover, the results also proved that the mass loading of MoO 2 has a huge effect on the electrochemical properties of MoO 2 @NPGA composites. With an appropriate amount of MoO 2 , the MoO 2 @NPGA composite shows a high specific capacitance (335 F g −1 at 1 A g −1 ) and excellent cycle stability (capacitance remains at 88% after 6000 cycles). Furthermore, the assembled symmetric supercapacitor displays a high energy density of 23.75 W h kg −1 at a power density of 300 W kg −1 and can maintain an energy density of 17.1 W h kg −1 when the power density reaches up to 6005 W kg −1 .