화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.37, 175-179, May, 2016
DOI10.1016/j.jiec.2016.03.025  Export Citation
Facile synthesis of flower-like a-Co(OH)2 nanostructures for electrochemical water splitting and pseudocapacitor applications
Yewon Cho, Jooyoung Lee, Trang Thi-Hong Nguyen, Jong Wook Bae1, Taekyung Yu2, and Byungkwon Lim†
  • School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
  • 1School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
  • 2Department of Chemical Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea
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We describe a facile synthetic route to α-Co(OH)2 nanostructures by heating a solution containing CoCl2, ethylene glycol, and oleylamine. Electron microscopy and X-ray diffraction analyses revealed that flower-like nanostructures of α-Co(OH)2 were formed by assembly of thin α-Co(OH)2 nanosheets. These nanostructures exhibited high activity for electrochemical water splitting with a current density comparable to that obtained on the commercial Pt wire electrode. In addition, these flower-like α-Co(OH)2 nanostructures showed specific capacitance as high as 440 F/g at a current density of 1 A/g and excellent stability without any noticeable loss in capacitance after 5000 cycles of the galvanostatic charge-discharge test.
Keywords:a-Co(OH)2;Synthesis;Flower-like nanostructures;Water splitting;Pseudocapacitor
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