Why do I see weight increase when doing TGA of LiFePO4 under inert conditions?

I did TGA of a LiFePO4 (LFP) sample and obtained a 3% of weight increase (heating rate of 10ºC/min till 700ºC and cooling down at 10ºC/min). I repeated the analysis several times, both in argon...

11 August 2023 4,626 4 View