Synthesis of LiFePO4/C composites based on natural iron stone using a sol gel method

Riyan Angela, Humaatul Islam, Vamellia Sari, Chaironi Latif, Mochamad Zainuri, Suminar Pratapa*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Synthesis of LiFePO4/C composites has been carried out using a sol gel method. The Fe precursor was made from a natural iron stone of Tanah Laut, South Kalimantan, while the other raw materials were commercial Li2CO3 powder and NH4H2PO4 powder with HCl and water as solvents. Citric acid was used as the carbon source in the synthesis. This study used a molar ratio of 1:1:2 for Li:Fe:P with variation of added citric acid of 1.5 and 2.5 g. The solutions were dried in air at 100°C. The dried powders were characterized using DSC-TGA and then calcined at 600 and 700°C under argon environment for 10 hours. The calcined powders were characterized by X-ray diffractometry (XRD), scanning electron microscopy-energy dispersive x-ray (SEM-EDX), and LCR meter. It was found that the samples contained LiFePO4 as the dominant phase and LiFeP2O7 and Fe2O3 as secondary phases. The analysis showed that the addition of citric acid influenced the electronic conductivity of the composites. A Rietveld relative weight fraction of up to 94.7% was achieved in the synthesis at temperature 600°C. The LFP/C sample exhibited electronic conductivity of 4.56×10-3 Scm-1 which was six times of that of the pure LFP.

Original languageEnglish
Title of host publicationInternational Conference on Engineering, Science and Nanotechnology 2016, ICESNANO 2016
EditorsBudi Kristiawan, Agung Tri Wijayanta, Dominicus Danardono, Budi Santoso, Miftahul Anwar, Triyono, Syamsul Hadi, Joko Triyono, Eko Surojo, Dody Ariawan, Ubaidillah, Suyitno, Nurul Muhayat
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414525
DOIs
Publication statusPublished - 3 Jan 2017
Event1st International Conference on Engineering, Science and Nanotechnology 2016, ICESNANO 2016 - Solo, Indonesia
Duration: 3 Aug 20165 Aug 2016

Publication series

NameAIP Conference Proceedings
Volume1788
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference1st International Conference on Engineering, Science and Nanotechnology 2016, ICESNANO 2016
Country/TerritoryIndonesia
CitySolo
Period3/08/165/08/16

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