Effects of adding different morphological carbon nanomaterials on supercapacitive performance of sol-gel manganese oxide films

Shih Hsun Chen, Cheng Hsuan Wu, Alex Fang, Chung Kwei Lin

研究成果: 雜誌貢獻文章同行評審

12 引文 斯高帕斯(Scopus)

摘要

In this study, the supercapacitive performances of manganese oxide films were investigated by adding different carbon nanomaterials, including carbon nanocapsules (CNC), multiwalled carbon nanotubes (MWCNTs) and multi-layered graphene. The manganese oxide films were prepared with manganese acetate precursor by sol-gel method, and the post-treatment effects were also examined. With a heat-treatment above 300 °C, the as-prepared amorphous films transformed to a compound of Mn3O4 and Mn2O3 phases, and the smooth surface became rough as well. Cyclic voltammogram (CV) tests showed that the manganese oxide film, which was mixed with 0.05 wt% MWCNTs and annealed at 350 °C for 1 h, exhibited the optimized specific capacitance, 339.1 F/g. During 1000CV cycles, the specific capacitances of original manganese oxide film decreased gradually from 198.7 to 149.1 (75%) F/g. After same number of cycle tests, the modified films containing 0.025 wt% CNC, 0.05 wt% MWCNTs and 0.1 wt% graphene retained 201.8 (64.2%), 267.4 (78.9%) and 193.1 (57.4%) F/g respectively. The results indicates that the supercapacitive performance of manganese oxide films were significantly modified by carbon nanomaterials; in addition, the MWCNTs additive could also reduce the decay rate.
原文英語
頁(從 - 到)4797-4805
頁數9
期刊Ceramics International
42
發行號4
DOIs
出版狀態已發佈 - 3月 1 2016

ASJC Scopus subject areas

  • 電子、光磁材料
  • 陶瓷和複合材料
  • 材料化學
  • 表面、塗料和薄膜
  • 製程化學與技術

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