I am studying the electrochemical behaviour of the LiCuPO4 material as cathode for Li-ion battery. I have performed CV analysis for my experiments in the potential window 1.0 to 4.5 V.
Electrolyte : 1M LiPF6 in (EC:DEC)
Scan rates : 0.5 mV/s
Could someone please tell me why the peaks disappeared on the 5th cycle? Can I say that this material is not stable and decomposed?
Many thanks,
Vinsensia
Hi Vinsensia,
maybe the scan rate is a bit fast. I'd try a CV at 0.05 mV/s and then see.
Best regards,
Juan Luis.
See, http://www.doc88.com/p-270338283321.html slide 28 and US patent 6,319,632.
Ex-situ XRD indicates that LiCuPO4 decomposes during the first discharge with low scan rate CV (or initial couple of discharges with high scan rate). After that, it appears to be Li1.5CuO2 and Li1.5-xCuO2 or similar nonactive compositions.
Hi I think cover of LiCuPO4 is separated from the current collector surface.
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering
- Electrodes