Utilization of Teak Wood Powder as a Carbon Source in LiFePO4/C Cathode Lithium-Ion Batteries

Abstract

LiFePO4 has a weakness in the form of low conductivity (10-9 S/cm). One of the efforts to increase electrical conductivity is through carbon coating. This study used a carbon source from teak sawdust (Tectona grandis). Synthesis of carbon by carbonization method with temperature variations of 350, 450, and 550°C and through the activation process. The synthesis of LFP/C used the solid-state method due to the simplicity of the process. Based on the SEM-EDX results, the carbon morphology appears to be microfibrils with the highest carbon content of 81.73%. The results of XRD and FTIR analysis showed that the LFP/C cathode material had an orthorhombic structure. Meanwhile, the SEM results show the morphology of the material in the form of a polyhedral. EIS testing has been carried out with the highest conductivity value of 3.31 x 10-3 S/cm and the results of the specific capacity obtained the highest value of 36.18 mAh/g.