Publication Type Journal Article
Title Nickel-cobalt oxide modified with reduced graphene oxide: Performance and degradation for energy storage applications
Authors A. Adan-Mas T. M. Silva L. Guerlou-Demourgues L. Bourgeois C. Labrugere-Sarroste Maria F. Montemor
Groups CSSE
Journal JOURNAL OF POWER SOURCES
Year 2019
Month April
Volume 419
Number
Pages 12-26
Abstract Nickel-cobalt oxide is synthesized in combination with electrochemically reduced graphene oxide (Er-GO) by one-step electrodeposition on stainless steel followed by thermal treatment. The presence of reduced graphene oxide leads to enhanced electrochemical response, with a capacity increase from 113 mA h g(-1) to 180 mA h g(-1), and to increased faradaic efficiency and rate capability. Compared to Ni-Co oxide, the addition of reduced graphene oxide increases capacity retention from 58\% to 83\% after 5000 cycles. The material fade during cycling is studied by means of electrochemical impedance spectroscopy, electron diffraction spectroscopy and scanning electron microscopy. As a result, different degradation mechanisms are identified as source of the capacity decay, such as microstructural cracking, phase transformation and parasitic reactions.
DOI http://dx.doi.org/10.1016/j.jpowsour.2019.02.055
ISBN
Publisher
Book Title
ISSN 0378-7753
EISSN 1873-2755
Conference Name
Bibtex ID ISI:000463305900003
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