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Enhanced electrochemical performance of a ZnO-MnO composite as an anode material for lithium ion batteries

Title
Enhanced electrochemical performance of a ZnO-MnO composite as an anode material for lithium ion batteries
Authors
Song, Min SeobNahm, SahnCho, Won IlLee, Chongmok
Ewha Authors
이종목
SCOPUS Author ID
이종목scopus
Issue Date
2015
Journal Title
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN
1463-9076JCR Link1463-9084JCR Link
Citation
vol. 17, no. 36, pp. 23496 - 23502
Publisher
ROYAL SOC CHEMISTRY
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A ZnO-MnO composite was synthesized using a simple solvothermal method combined with a high-temperature treatment. To observe the phase change during the heating process, in situ high-temperature XRD analysis was performed under vacuum conditions. The results indicated that ZnMn2O4 transformed into the ZnO-MnO composite phase starting from 500 degrees C and that this composite structure was retained until 700 degrees C. The electrochemical performances of the ZnO-MnO composite electrode were evaluated through galvanostatic discharge-charge tests and cyclic voltammetry analysis. Its initial coulombic efficiency was significantly improved to 68.3% compared to that of ZnMn2O4 at 54.7%. Furthermore, the ZnO-MnO composite exhibited improved cycling performance and enhanced rate capability compared with untreated ZnMn2O4. To clarify the discharge-charge mechanism of the ZnO-MnO composite electrode, the structural changes during the charge and discharge processes were also investigated using ex situ XRD and TEM.
DOI
10.1039/c5cp03375f
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자연과학대학 > 화학·나노과학전공 > Journal papers
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