The characteristic of carbon-coated LiFePO4 as cathode material for lithium ion battery synthesized by sol-gel process in one step heating and varied pH

Abstract

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.

POTENSI RISET DAN PENGEMBANGAN FePO4 DARI BAHAN BAKU LOKAL Fe2O3 DI INDONESIA

“…Riset dan pengembangan baterai lithium-ion yang dilakukan di Indonesia umumnya menitikberatkan pada pembuatan material-material bahan aktif untuk katoda, anoda dan elektrolit. Bahan-bahan aktif untuk katoda yang dikembangkan sendiri adalah LiFePO4 6,7,8,9) dan LiMnPO4 10) . Sementara itu, bahan aktif untuk anoda yang dikembangkan adalah Li4Ti5O12 11,12,13) , sedangkan bahan elektrolit yang dikembangkan adalah LiBOB 14,15,16,17) .…”

Review : Metode Sintesis Katoda LiFePO4 Baterai Lithium-Ion

“…Pada penelitian Triwibowo dkk. [21] dilakukan variasi penambahan asam sitrat untuk mengontrol pH gel yang dibentuk. Sol dalam penelitian ini memiliki pH 5, 5,4 dan 5,8.…”