Hi, I have an inquiry concerning the carbon concentration of my material.

I synthesized carbon-coated LiFePO₄ and NaCrO₂ materials as cathode materials for Li-ion and Na-ion batteries, respectively. I conducted an investigation with EA and SEM-EDS; however, I could not achieve consistent results. I did an analysis of TGA for NaCrO₂, but it was not replicated. Can somebody propose a solution for this issue?

Thank you...