Abstract
Electrochemical lithium insertion into P 8W 12O 52 has allowed the determination of several phases Li x P 8W 12O 52 (0 ≤ x ≤ 72) between 3.2 and 0.01 V vs Li +/Li o. After the first cycle the electrochemical system was unable to maintain the high specific capacity of the cell (625 A h/kg) due to irreversible processes. Nevertheless at low lithium content, x ≤ 8, the lithium insertion proceeded through a reversible mechanism. By means of in situ X-ray diffraction experiments we have detected the nature of different phases Li x P 8W 12O 52 formed and we have established a correlation with the reversible/irreversible processes detected during the electrochemical insertion. Measurements of resistivity show that upon lithium insertion the metallic pristine oxide becomes insulating.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call