α1-LiVOPO4, β-LiVOPO4, and α-LiVOPO4 are known as multiple lithium intercalation cathode materials. They were characterized by means of half-cell performance, operando X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), and differential scanning calorimetry (DSC). The operando XRD revealed differences in crystal structure evolution during charging/ discharging among the three crystal phases. Although the charge/discharge profiles and the crystal structure evolution behaviors were the same among the three crystal phases in the range of 3.5-4.5 V, the profiles and behaviors differed completely in the range of 1.0-3.5 V. The thermal stability of each phase of LiVOPO4 is similar to that of LiFePO4 in the fully charged state from the results of the DSC profiles.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
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