N-doped reduced graphene oxide/Co0.85Se microflowers with high mass loading as battery-type materials for quasi-solid-state hybrid supercapacitors

Du M. ¹Wang Z. ¹Deng Y. ¹Wang T. ¹Zhong W. ¹Yin W. ¹Jiao Z. ¹Xia W. ¹Jiang B. ¹Zhou K. ¹Chen Y. ¹Yang C. ²Yun S.²

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作者信息

1. School of Materials Science and Technology Xi'an University of Technology
2. Functional Materials Laboratory (FML) School of Materials Science and Engineering Xi'an University of Architecture and Technology
折叠

Abstract

In this work, we prepared N-doped reduced graphene oxide/Co0.85Se (N-rGO/CS) microflowers through a two-step method. Since introducing N-doped rGO, the fabricated N-rGO/CS electrode with a high mass loading (~8.83 mg/cm2) exhibits high areal specific capacity of 0.522 mAh/cm2 (4.24 F/cm2) at 1 mA/cm2, and a long-term cycling stability (85.8% of capacity retention after 6000 charge-discharge cycles). This is mainly because N-doped rGO can increase specific area and electrical conductivity, enhance the electrochemical activity and effectively facilitate the electron/ion transport between the electrode and electrolyte. Besides, the quasi-solid-state hybrid supercapacitors (HSCs) assembled by the N-rGO/CS delivers a high volumetric specific capacity of 5.82 mAh/cm3 at 1 mA/cm2, excellent energy density of 4.65 mWh/cm3 under 10.5 mW/cm3 and eminement cycle stability (87.6% retention over 6000 cycles at 10 mA/cm2).

Key words

Co0.85Se/High mass loading/N-doped graphene/Quasi-solid-state supercapacitors

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量3

参考文献量58

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