Abstract
Asymmetric behavior of structural changes during charge and discharge of C-coated LiFePO4 has been investigated using synchrotron based in situ XRD. C-coated LiFePO4 undergoes phase transformation from triphylite to heterosite during charge and vise versa during discharge. However, it is observed that the phase transformation of C-coated Li1-xFePO4 during discharge is more difficult to be complete than that during charge. At 2C rate, the phase transformation from heterosite to triphylite was hardly observed during discharge while the complete phase transformation was observed in the previous charge. This indicates that the degree of the phase transformation completeness depends on the direction of the phase transformations.
Original language | English |
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Pages (from-to) | 536-540 |
Number of pages | 5 |
Journal | Electrochemistry Communications |
Volume | 10 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2008 Apr |
Keywords
- Asymmetry
- In situ X-ray diffraction
- LiFePO
- Lithium secondary batteries
ASJC Scopus subject areas
- Electrochemistry