Pseudocapacitive performance of manganese oxide coated hierarchical cobalt oxide structure prepared by hydrothermal process

C. K. Lin, P. C. Lin, S. J. Shih, C. J. Chang, J. B. Shi, C. Y. Chen

研究成果: 雜誌貢獻文章

摘要

In the present study, a manganese (Mn) oxide deposited hierarchical cobalt (Co) oxide structure was prepared as a supercapacitor electrode by a two-step hydrothermal process. A Co-oxide hierarchical structure was first prepared as a template on a graphite substrate by hydrothermal and post heat treatment (calcination) processes. Subsequently, the Mn-oxide was deposited onto the surface of the Co-oxide template to form a Mn-oxide coated hierarchical Co-oxide structure by a secondary hydrothermal process. The effects of calcination time on the material characteristics and pseudocapacitive performance of the Mn-oxide coated structure were investigated. Experimental results showed that the microstructural properties of hydrothermally synthesized Co-oxide with a snowflake-like morphology varied with the calcination conditions. A great improvement of > 100% in capacitance of the Mn-oxide coating was obtained by using a template with a Co-oxide hierarchical structure. Moreover, with high capacitance, the excellent cycling stability of the Mn-oxide coated hierarchical Co-oxide structure exhibited high potential for practical application as a pseudocapacitor.
原文英語
期刊Ceramics International
DOIs
出版狀態接受/付印 - 2017

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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