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A morphology, porosity and surface conductive layer optimized MnCo2O4 microsphere for compatible superior Li+ ion/air rechargeable battery electrode materials

Title
A morphology, porosity and surface conductive layer optimized MnCo2O4 microsphere for compatible superior Li+ ion/air rechargeable battery electrode materials
Author
박진성
Keywords
LITHIUM-ION BATTERIES; ANODE MATERIALS; MULTIPOROUS MNCO2O4; CO3O4 NANOPARTICLES; LI-O-2 BATTERIES; PERFORMANCE; HOLLOW; GRAPHENE; STORAGE; REDUCTION
Issue Date
2016-02
Publisher
ROYAL SOC CHEMISTRY
Citation
DALTON TRANSACTIONS, v. 45, NO 12, Page. 5064-5070
Abstract
Uniform surface conductive layers with porous morphology-conserved MnCo2O4 microspheres are successfully synthesized, and their electrochemical performances are thoroughly investigated. It is found that the microwave-assisted hydrothermally grown MnCo2O4 using citric acid as the carbon source shows a maximum Li+ ion lithiation/delithiation capacity of 501 mA h g(-1) at 500 mA g(-1) with stable capacity retention. Besides, the given microsphere compounds are effectively activated as air cathode catalysts in Li-O-2 batteries with reduced charge overpotentials and improved cycling performance. We believe that such an affordable enhanced performance results from the appropriate quasi-hollow nature of MnCo2O4 microspheres, which can effectively mitigate the large volume change of electrodes during Li+ migration and/or enhance the surface transport of the LiOx species in Li-air batteries. Thus, the rationally designed porous media for the improved Li+ electrochemical reaction highlight the importance of the 3D macropores, the high specific area and uniformly overcoated conductive layer for the promising Li+ redox reaction platforms.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2016/DT/C5DT04975J#!divAbstracthttp://hdl.handle.net/20.500.11754/34129
ISSN
1477-9226; 1477-9234
DOI
10.1039/c5dt04975j
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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