Browse

Phase Stability Study of Li1-xMnPO4 (0 <= x <= 1) Cathode for Li Rechargeable Battery

Cited 97 time in Web of Science Cited 103 time in Scopus
Authors
Kim, Sung-Wook; Kim, Jongsoon; Gwon, Hyeokjo; Kang, Kisuk
Issue Date
2009-05
Citation
Journal of the Electrochemical Society, Vol.156 No.8, pp.A635-A638
Keywords
cathodeselectron microscopylithium compoundsmanganese compoundssecondary cellssolid-state phase transformationsX-ray diffraction
Abstract
The phase stability of Li1-xMnPO4 (0 <= x <= 1) is investigated in this study for different Li compositions and temperatures by high temperature X-ray diffraction and electron microscopy. The map of stable phases is determined at temperature ranges between room temperature and 410 degrees C. While pure LiMnPO4 phase is stable at high temperature, partial phase transformation of MnPO4 into Mn2P2O7 is observed in delithiated phases above 210 degrees C. Electron microscopy study also indicates the instability of the delithiated phase. The morphology of LiMnPO4 is severely damaged upon delithiation. The instability of the delithiated phase and the phase transformation into Mn2P2O7 may imply that safety concerns can be raised regarding the LiMnPO4 cathode, unlike its Fe counterpart.
ISSN
0013-4651
URI
http://hdl.handle.net/10371/165186
DOI
https://doi.org/10.1149/1.3138705
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse