کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1295747 | 1498415 | 2005 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical lithium insertion in the phosphate tungsten bronze P8W12O52 Electrochemical lithium insertion in the phosphate tungsten bronze P8W12O52](/preview/png/1295747.png)
Electrochemical lithium insertion into P8W12O52 has allowed the determination of several phases LixP8W12O52 (0 ≤ x ≤ 72) between 3.2 and 0.01 V vs Li+/Lio. 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 LixP8W12O52 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.
Journal: Solid State Ionics - Volume 176, Issues 35–36, 15 November 2005, Pages 2625–2630