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Synthesis and Characterization of Cobalt Hydroxide Carbonate Nanostructures

Title
Synthesis and Characterization of Cobalt Hydroxide Carbonate Nanostructures
Author
Xuehao Lin
Advisor(s)
Erfan Zalnezhad
Issue Date
2017-08
Publisher
한양대학교
Degree
Master
Abstract
Battery-type electrodes consisting of three-dimensional (3D) hierarchical cobalt hydroxide carbonate arrays on Ni foam were fabricated employing a hydrothermal method for use in supercapacitors. X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy were used to characterize the structures and morphologies of the electrode materials. 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.
URI
http://hdl.handle.net/20.500.11754/33487http://hanyang.dcollection.net/common/orgView/200000431074
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > MECHANICAL CONVERGENCE ENGINEERING(융합기계공학과) > Theses (Ph.D.)
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