Sintesis Material Aktif Katoda LiFe0.9Ni0.1PO4 dengan Variasi Pelapisan Carbon dari Tapioka

Abstract

Synthesis active material cathode LiFe0.9Ni0.1PO4/C with solid state methode and pyrolysis has been done. The base materials used is powder LiOH.H2O as Li-ion source, Fe2O3 as Fe source, Ni as Ni source, H3PO4 solution as PO4 source and tapioca powder as carbon source. In this observation used variation of tapioca composition with active materials 1:4, 1:5, and 1:6. Characterization using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), dan Electrochemical Impedance Spectroscopy (EIS). This analysis result indicate each composition has a conductivity of 0,01x10-3 S/cm for composition 1:4, 4,44x10-3 S/cm for composition 1:5 and 1,51x10-3 S/cm for composition 1:6. The optimum composition is the composition of 1:5. Because with enough carbon composition has a regular crystal area, and also has many pores so that the lithium ions would easily diffuse and result high conductivity.