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Title: The characteristic of carbon-coated LiFePO{sub 4} as cathode material for lithium ion battery synthesized by sol-gel process in one step heating and varied pH

This research has been done on the synthesis of carbon coated LiFePO{sub 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{sub 4}/C precursors are Li{sub 2}CO{sub 3}, NH{sub 4}H{sub 2}PO{sub 4} and FeC{sub 2}O{sub 4}.H{sub 2}O and citric acid. In the synthesis process, consisting of a colloidal suspension FeC{sub 2}O{sub 4}.H{sub 2}O and distilled water mixed with a colloidal suspension consisting of NH{sub 4}H{sub 2}PO{sub 4}, Li{sub 2}CO{sub 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.
Authors:
 [1] ; ;  [2]
  1. Research Center for Physics LIPI, Kawasan PUSPIPTEK Serpong (Indonesia)
  2. Gadjah Mada University, Faculty of Mathematics and Natural Sciences, Sekip Utara Yogyakarta (Indonesia)
Publication Date:
OSTI Identifier:
22307908
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1617; Journal Issue: 1; Conference: ICTAP 2013: 3. international conference on theoretical and applied physics, Malang, East Java (Indonesia), 10-11 Oct 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON; CATHODES; CITRIC ACID; ELECTRIC BATTERIES; GELS; HYDROGEN 4; LAYERS; LITHIUM CARBONATES; LITHIUM IONS; MORPHOLOGY; PH VALUE; POWDERS; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; SUSPENSIONS; SYNTHESIS; WATER; X-RAY DIFFRACTION