Hydrothermal synthesis of porous Co(OH)2 nanoflake array film and its supercapacitor application

Bulletin of materials science

A X Pan³  Z Chen¹  C Zuo²  Y Chen²  S Zhou²  A G Xiao² 

[1] College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, China$$Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China$$College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, ChinaCollege of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, China$$Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China$$Department of Chemistry, Huzhou Teachers College, Huzhou 313000, ChinaCollege of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, China$$Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China$$;College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, China$$College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, ChinaCollege of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan 415000, China$$;Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China$$Department of Chemistry, Huzhou Teachers College, Huzhou 313000, ChinaDepartment of Chemistry, Huzhou Teachers College, Huzhou 313000, China$$

关键词: Cobalt hydroxide;    hydrothermal synthesis;    porous film;    supercapacitor.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Porous ð›�?-Co(OH)₂ nanoflake array film is prepared by a facile hydrothermal synthesis method. The ð›�?-Co(OH)₂ nanoflake array film exhibits a highly porous net-like structure composed of interconnected nanoflakes with a thickness of 15 nm. The pseudo-capacitive behaviour of the Co(OH)₂ nanoflake array film is investigated by cyclic voltammograms (CV) and galvanostatic chargeâ€�?�discharge tests in 2MKOH. The ð›�?-Co(OH)₂ nanoflake array film exhibits high capacitances of 1017 F g^-1 at 2Ag^-1 and 890 F g^-1 at 40Ag^-1 as well as rather good cycling stability for supercapacitor application. The porous architecture is responsible for the enhancement of the electrochemical properties because it provides fast ion and electron transfer, large reaction surface area and good strain accommodation.

【 授权许可】

Unknown