Enhanced electrochemical performance of a ZnO-MnO composite as an anode material for lithium ion batteries
- Authors
- Song, Min Seob; Nahm, Sahn; Cho, Won Il; Lee, Chongmok
- Issue Date
- 2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.17, no.36, pp.23496 - 23502
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS
- Volume
- 17
- Number
- 36
- Start Page
- 23496
- End Page
- 23502
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96299
- DOI
- 10.1039/c5cp03375f
- ISSN
- 1463-9076
- 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.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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