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Facile preparation of porous Co3O4 nanosheets for high-performance lithium ion batteries and oxygen evolution reaction

Title
Facile preparation of porous Co3O4 nanosheets for high-performance lithium ion batteries and oxygen evolution reaction
Author
백운규
Keywords
Co3O4; Two-dimensional; Anode; Electrocatalyst; Oxygen evolution reaction
Issue Date
2016-02
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v. 310, Page. 41-46
Abstract
Two dimensional (2D) porous nanostructures are of great interest due to their high surface area and rich edge sites, which are favorable for a wide variety of applications. In this communication, well-defined porous Co3O4 nanosheets (PCNSs) are successfully fabricated using graphene oxide as sacrificial template. The 2D structure and porous nature effectively provide more exposed active sites for electrochemical reaction and facilitate easier ion transportation across the sheets. As a result, the as-prepared PCNSs exhibit remarkable lithium storage performance, showing high reversible capacity of 1380 mAh g(-1) even after 240 discharge/charge cycles at a current density of 500 mA g(-1) and good rate capability (606 mAh g(-1) at 10 A g(-1)). Moreover, it also shows a good electrocatalytic activity for the electrochemical oxygen evolution reaction with an overpotential of 368 mV for driving the current density of 10 mA cm(-2) in 1 M KOH and a small Tafel slope of 59 mV dec(-1). (C) 2016 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0378775316301070?via%3Dihubhttp://hdl.handle.net/20.500.11754/33911
ISSN
0378-7753; 1873-2755
DOI
10.1016/j.jpowsour.2016.01.105
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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