Enhanced Capacitive Properties of All-solid-state Symmetric Graphene Supercapacitors by Incorporating Nitrogen-doping and SnO2 Nanoparticles

doi:10.15541/jim20140527

Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (6): 662-666.DOI: 10.15541/jim20140527

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Enhanced Capacitive Properties of All-solid-state Symmetric Graphene Supercapacitors by Incorporating Nitrogen-doping and SnO₂ Nanoparticles

YU Jian-Hua^{1, 2}, XU Li-Li¹, ZHANG Wu-Shou³, ZHU Qian-Qian¹, WANG Xiao-Xia¹, DONG Li-Feng¹

(1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; 2. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China; 3.?Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute?of?Chemistry, Chinese Academy of Sciences, Beijing 100190, China)

Received:2014-10-20 Published:2015-01-20 Online:2015-05-22
About author:YU Jian-Hua(1984–), female, assistant professor. E-mail: jianhuayu@qust.edu.cn
Supported by:
International Scince and Technology Cooperation Program of China (2014DFA60150);Qingdao Municipal Science and Technology Program (13-1-4-219-jch);Open Fund of Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences (KLICM-2012-06)

Abstract

Abstract:

Graphene and N-doped graphene were synthesized by a solvothermal process, and their composites with SnO₂ nanoparticles were prepared by a facile one-pot chemical solution method. The corresponding films were fabricated by a blade coating process and followed by heat treatment at 400℃ for 1 h. All-solid-state supercapacitors were fabricated with graphene based films and a polymer gel of polyvinyl alcohol/H₃PO₄ as electrodes and electrolyte, respectively. The capacitance performance of the as-fabricated supercapacitors was characterized. The results suggest that compared with graphene, N-doped graphene exhibits larger crystalline size, lower specific surface area, yet superior capacitance performance, and the incorporation of SnO₂ nanoparticles on graphene and N-doped graphene sheets enhances their capacitive characteristics.

Key words: nanocomposite, SnO2 nanoparticles, nitrogen-doped graphene, supercapacitors

CLC Number:

TQ174

YU Jian-Hua, XU Li-Li, ZHANG Wu-Shou, ZHU Qian-Qian, WANG Xiao-Xia, DONG Li-Feng. Enhanced Capacitive Properties of All-solid-state Symmetric Graphene Supercapacitors by Incorporating Nitrogen-doping and SnO₂ Nanoparticles[J]. Journal of Inorganic Materials, 2015, 30(6): 662-666.

Figures/Tables 4

Fig. 1 Survey XPS spectra of PG (a) and NG (b), N1s spectra of NG (c) and Raman spectra of PG and NG (d)

Fig. 2 XRD patterns of PG, NG, SnO2/PG and SnO2/NG

Fig. 3 TEM images of SnO2/PG (a) and SnO2/NG (b) as well as their corresponding HRTEM images (c) and (d), respectively

Fig. 4 Electrochemical characterizations of graphene-based supercapacitors CV curves for PG and NG at different scanning rates (a, b), CV curves for PG, NG, SnO2/PG, and SnO2/NG at a scanning rate of 50 mV/s (c), and their Nyquist plots (d)

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Enhanced Capacitive Properties of All-solid-state Symmetric Graphene Supercapacitors by Incorporating Nitrogen-doping and SnO₂ Nanoparticles

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