Cited 3 time in webofscience Cited 3 time in scopus

Mesoporous Co-CoO/N-CNR nanostructures as high-performance air cathode for lithium-oxygen batteries

Title
Mesoporous Co-CoO/N-CNR nanostructures as high-performance air cathode for lithium-oxygen batteries
Authors
Hyun, SuyeonShanmugam, Sangaraju
DGIST Authors
Hyun, Suyeon; Shanmugam, Sangaraju
Issue Date
2017-06-30
Citation
Journal of Power Sources, 354, 48-56
Type
Article
Article Type
Article
Keywords
Air CathodeCarbon NanofibersCarbon NanorodsCatalystsCobalt NanoparticlesComposite MaterialsElectrochemical PerformanceElectrodeEvolution ReactionsLi O2 BatteriesLi O2 BatteriesNitrogen Doped GrapheneOxygen ElectrodeRechargeable Li O 2 BatteriesReduction ReactionStability
ISSN
0378-7753
Abstract
A bifunctional air cathode for the electrochemical oxygen reduction and evolution in a Li-O2 battery comprising Co-CoO nanoparticles embedded in the nitrogen-doped carbon nanorods (Co-CoO/N-CNR) is presented. The nanorod morphology with mesoporous nanostructures can handle continuous formation and decomposition of Li2O2 and favors the transport of electrons and ions, therefore improves the rate capability and cycle stability. Moreover, the hierarchical mesoporous Co-CoO/N-CNR reduces the overall overpotential over the cycle and decreases the side reaction between Li2O2 and carbon surface, leading to a significant enhancement of the specific capacity and cycling capability. With the cooperative effect of Co-CoO/N-CNR and porous nature, Co-CoO/N-CNR cathode delivers a high discharge specific capacity of 10,555?mAh?g?1 at 100?mA?g?1 and long cycle stability for over 86 cycles without any capacity loss at a high cutoff capacity of 1000?mAh?g?1. Furthermore, excellent performance of 7514?mAh?g?1 at 500?mA?g?1 is achieved. ? 2017 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/4041
DOI
10.1016/j.jpowsour.2017.04.029
Publisher
Elsevier B.V.
Related Researcher
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE