The Origin of the Residual Carbon in LiFePO4 Synthesized by Wet Milling

, suggesting that the wet milling process can increase the capacity in addition to conventional carbon coating methods. UV spectroscopy, ele-mental microanalysis, and evolved gas analysis are used to find the root cause of the capacity improvement during the mechanochemical reaction in acetone. The analytical results show that the improvement is attributed to the con-ductive residual carbon on the surface of the wet milled LiFePO