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Improving the Supercapacitor Performance by Dispersing SiO2 Microspheres in Electrodes.
Lo, An-Ya; Chang, Chia-Chia; Lai, Yi-Wei; Chen, Peng-Ren; Xu, Bai-Cheng.
Afiliação
  • Lo AY; Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.
  • Chang CC; Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.
  • Lai YW; Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.
  • Chen PR; Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.
  • Xu BC; Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.
ACS Omega ; 5(20): 11522-11528, 2020 May 26.
Article em En | MEDLINE | ID: mdl-32478241
ABSTRACT
This paper describes a simple, reproducible, and scalable procedure for the preparation of a SiO2-containing supercapacitor with high cycle stability. A carbon mesoporous material (CMM) with a high specific surface area, CMK-3, was adopted as an electric double-layer capacitor (EDLC) active material for the preparation of electrodes for the supercapacitor. The optimized SiO2 content decreased as the microsphere diameter decreased, and the optimal specific capacitance was obtained with 6 wt % SiO2 microspheres (100 nm size). The capacitance improved from 133 to 298 F/g. The corresponding capacitance retention rate after 1000 cycles increased from 68.04 to 91.53%. In addition, the energy density increased from 21.05 to 26.25 Wh/kg with a current density of 1 A/g. Finally, similar results based on active carbon, CeO2/CMK-3, and graphene/CNT/MnOv composite electrodes demonstrated that the proposed method exhibits wide compatibility with diverse electrode materials.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article