The effects of carbon coating on the structure and electrical conductivity of LiFeSi0.03p0.97o4/c cathode material via solid state process

Pelangi Az-Zahra, Mochamad Zainuri, Hafizhah Ellora Della, May Shela Widya Putri, Bintoro Anang Subagyo

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

Abstract

The synthesis of LiFeSi0.03P0.97O4/C (LFSP/C) composites have been done by solid state method. This study investigates the effects of carbon coating on the structure, microstructure and electrical conductivity of LFSP/C cathode materials. The carbon coating on Lithium Ferro Phosphate (LFP) plays a crucial role in determining its electrical conductivity. The variation of carbon content is 0wt.%; 6wt.%; 7wt.%; 8wt.% (LFP-0%, LFP-6%, LFP-7% and LFP-8%). The characterization was performed using X-Ray Diffraction (XRD), Scanning Electron Microscopy Energy Dispersive X-ray (SEM-EDX), HighResolution-Transmission Electron Microscopy (HRTEM) and LCR Meter tests. The XRD result have shown single-phase olivine (LiFePO4) in all samples. The analysis microstructure using SEM have shown increasing carbon content can reduce agglomeration. The particles size of LFSP is 845.570 nm, and after coating carbon the particles size decreased up to 457.191 nm. The EDX results showed that the amount of atomic percentage for carbon tends to increase as the amount of carbon content increased. HR-TEM images indicates that the formation of carbon layer have formed, but not perfectly coat the LFP particle. The average carbon layer size is 78.31 nm with the size of LFSP particle is 352.82 nm. The LCR Meter result showed that LFP-7% had the largest electronic conductivity (2.275x10-7 S/cm). The carbon coating led to significant enhancement in electronic conductivity from ~10-9-10-10 S/cm to ~10-7 S/cm.

Original languageEnglish
Title of host publicationFunctional Materials
Subtitle of host publicationFundamental Research and Industrial Application
Editors Risdiana, Budhy Kurniawan, Darminto, A.A. Nugroho
PublisherTrans Tech Publications Ltd
Pages179-184
Number of pages6
ISBN (Print)9783035718690
DOIs
Publication statusPublished - 2021
Event5th International Conference on Functional Materials Science, ICFMS 2020 - Virtual, Online
Duration: 11 Nov 202012 Nov 2020

Publication series

NameMaterials Science Forum
Volume1028 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference5th International Conference on Functional Materials Science, ICFMS 2020
CityVirtual, Online
Period11/11/2012/11/20

Keywords

  • Carbon coating
  • Cathode
  • Conductivity
  • Olivine
  • Solid-state method

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