Thermal stability of Fe–Mn binary olivine cathodes for Li rechargeable batteries
- ️Kisuk Kang
* Corresponding authors
a
Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, Korea 151-742
E-mail:
matlgen1@snu.ac.kr
Fax: +82-2-885-9671
Tel: +82-2-880-7088
b Department of Materials Science and Engineering, KAIST (Korea Advanced Institute of Science and Technology), Gwahangno 335, Yuseong-gu, Daejeon, Korea 305-701
Abstract
The phase stability of binary Fe and Mn olivine materials is extensively studied with temperature-controlled in situ X-ray diffraction (XRD) for various Fe/Mn ratios and state of charges (SOCs). We identify that the thermal behavior of partially charged olivine materials is sensitively affected by the Fe/Mn ratio in the crystal. While Fe-rich binary olivine materials readily formed a solid solution phase of Li1−yFe1−xMnxPO4 near room temperature or with only slight heating, the Mn-rich binary olivine retained its two-phase characteristic up to ca. 250 °C before decomposition into non-olivine phases. The thermal stability and decomposition mechanism of fully delithiated olivine materials are more sensitively affected by the Fe/Mn ratio in the crystal. The decomposition temperature varies from 200 °C to 500 °C among the different Fe/Mn ratios. It is generally observed that the Mn-rich binary olivine materials are inferior to the Fe-rich ones with respect to the thermal stability in the delithiated state.
Supplementary files
Article information
- https://doi.org/10.1039/C2JM30733B
- Paper
- 07 Feb 2012
- 08 Apr 2012
- 13 Apr 2012
DOI
Article type
Submitted
Accepted
First published
J. Mater. Chem., 2012,22, 11964-11970
Permissions
Thermal stability of Fe–Mn binary olivine cathodes for Li rechargeable batteries
J. Kim, K. Park, I. Park, J. Yoo, J. Hong and K. Kang, J. Mater. Chem., 2012, 22, 11964 DOI: 10.1039/C2JM30733B
To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.
If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.
If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.
Read more about how to correctly acknowledge RSC content.