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

被引：5
|
作者：
Du, Miao [1 ]
Wang, Zejin [1 ]
Yang, Chao [2 ]
Deng, Yefan [1 ]
Wang, Ting [1 ]
Zhong, Wei [1 ]
Yin, Wang [1 ]
Jiao, Zhichao [1 ]
Xia, Weimin [1 ]
Jiang, Bailing [1 ]
Zhou, Kesong [1 ]
Yun, Sining [2 ]
Chen, Yuanqing [1 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Technol, Xian 710048, Peoples R China
[2] Xian Univ Architecture & Technol, Sch Mat Sci & Engn, Funct Mat Lab FML, Xian 710055, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 890卷
关键词：
Co0.85Se; N-doped graphene; High mass loading; Quasi-solid-state supercapacitors; METAL-ORGANIC FRAMEWORK; ELECTROCHEMICAL PERFORMANCE; FACILE SYNTHESIS; CARBON; ELECTRODE; NANOPARTICLES; FOAM; CAPACITANCE; NANOSHEETS; ARRAYS;
D O I：
10.1016/j.jallcom.2021.161801
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 (similar to 8.83 mg/cm(2)) exhibits high areal specific capacity of 0.522 mAh/cm(2) (4.24 F/cm(2)) at 1 mA/cm(2), 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/cm(3) at 1 mA/cm(2), excellent energy density of 4.65 mWh/cm(3) under 10.5 mW/cm(3) and eminement cycle stability (87.6% retention over 6000 cycles at 10 mA/cm(2)). (C) 2021 Elsevier B.V. All rights reserved.
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页数：11
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