Abstract. This research has been done on the synthesis of carbon coated LiFePO 4 through sol-gel process. Carbon layer serves for improving electronic conductivity, while the variation of pH in the sol-gel process is intended to obtain the morphology of the material that may improve battery performance. LiFePO 4 /C precursors are Li 2 CO 3 , NH 4 H 2 PO 4 and FeC 2 O 4 .H 2 O and citric acid. In the synthesis process, consisting of a colloidal suspension FeC 2 O 4 .H 2 O and distilled water mixed with a colloidal suspension consisting of NH 4 H 2 PO 4 , Li 2 CO 3 , and distilled water. Variations addition of citric acid is used to control the pH of the gel formed by mixing two colloidal suspensions. Sol in this study had a pH of 5, 5.4 and 5.8. The obtained wet gel is further dried in the oven and then sintered at a temperature 700°C for 10 hours. The resulting material is further characterized by XRD to determine the phases formed. The resulting powder morphology is observed through SEM. Specific surface area of the powder was tested by BET, while the electronic conductivity characterized with EIS.
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