Synthesis and characterization of cobalt hydroxide carbonate nanostructures

Xuehao Lin, Hui Li, Farayi Musharavati, Erfan Zalnezhad, Sungchul Bae, Bum-Yean Cho, Oscar K. S. Hui

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Battery-type electrodes of three-dimensional (3D) hierarchical cobalt hydroxide carbonate arrays on Ni foam were fabricated using a hydrothermal method for use in supercapacitors. X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy were used to characterize their structures and morphologies. The cobalt hydroxide carbonate synthesized with 10 h reaction time showed the highest specific capacitance (1381 F g−1 at a current density of 2 A g−1) and excellent cycling stability (92% capacitance retention after 5000 cycles). Moreover, its capacitance increased by 33% at 2 A g−1 and by 10% at 20 A g−1 after 5000 charge–discharge cycles. This cobalt hydroxide carbonate composite is a promising candidate for electrochemical energy-related applications.
Original languageEnglish
Pages (from-to)46925-46931
Number of pages7
JournalRSC Advances
Issue number74
Early online date4 Oct 2017
Publication statusPublished - 2017

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