Optimization of In-Situ Synthesis Process Parameters of LiFePO4/C-MAF-5 Surface Modification for Conductivity Improvement of LIB Cathode Material by Response Surface Method

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Document Type : Original Article

Authors

1 Department of Chemistry, Universitas Padjadjaran, Bandung 45363, Indonesia

2 Department of Physics, Universitas Padjadjaran, Bandung 45363, Indonesia

3 Research Center for Polymer Technology, National Research and Innovation Agency (BRIN), South Tanggerang 15314, Indonesia

Abstract

This study presents an evaluation of the conductivity of in-situ synthesis of LiFePO4/C-MAF-5 through the use of Response Surface Methodology (RSM) in optimizing process parameters.. Performance and optimization were established by combining RSM with the experimental carbonation process, crystallographic analysis using X-ray diffraction (XRD), and Fourier infrared spectroscopy (FT-IR). The results revealed that crystal structure is important in determining electrical properties, with conductivity consistently higher at smaller sample sizes. Furthermore, the main focus is provided on how the lattice parameters and electrical conductivity of LiFePO4 are affected by particle size. The higher electrical conductivity is due to the smaller particles, where reduced lattice strain is indicated. Furthermore, the success of the synthesis process was confirmed by the absorption peaks that corresponded to the expected LiFePO4 features and corresponded to specific vibrational methods as presented in the FT-IR spectrum results. The complex relationship between conductivity, LiFePO4 amount, and imidazole concentration is demonstrated by the RSM contour plot. It was found that the optimal LFP concentration was 4, the ideal Imidazole concentration was 58.79, and the optimal temperature was set at 700. Under these recommended operating conditions, the resulting conductivity was determined to be 0.0000592.

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International Journal of Engineering

Articles in Press, Accepted Manuscript
Available Online from 19 March 2024

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