Synthesis and characterization of lifepo4 –pani hybrid material as cathode for lithium-ion batteries

Cesario Ajpi, Naviana Leiva, Max Vargas, Anders Lundblad, Göran Lindbergh, Saul Cabrera

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

This work focuses on the synthesis of LiFePO4 –PANI hybrid materials and studies their electrochemical properties (capacity, cyclability and rate capability) for use in lithium ion batteries. PANI synthesis and optimization was carried out by chemical oxidation (self-assembly process), using ammonium persulfate (APS) and H3 PO4, obtaining a material with a high degree of crystallinity. For the synthesis of the LiFePO4 –PANI hybrid, a thermal treatment of LiFePO4 particles was carried out in a furnace with polyaniline (PANI) and lithium acetate (AcOLi)-coated particles, using Ar/H2 atmosphere. The pristine and synthetized powders were characterized by XRD, SEM, IR and TGA. The electrochemical characterizations were carried out by using CV, EIS and galvanostatic methods, obtaining a capacity of 95 mAhg−1 for PANI, 120 mAhg−1 for LiFePO4 and 145 mAhg−1 for LiFePO4 –PANI, at a charge/discharge rate of 0.1 C. At a charge/discharge rate of 2 C, the capacities were 70 mAhg−1 for LiFePO4 and 100 mAhg−1 for LiFePO4 –PANI, showing that the PANI also had a favorable effect on the rate capability.

Original languageEnglish
Article number2834
Pages (from-to)1-19
Number of pages19
JournalMaterials
Volume13
Issue number12
DOIs
StatePublished - 2 Jun 2020

Bibliographical note

Funding Information:
Funding: This research was funded by SIDA (Swedish International Development Agency); KTH Royal Institute of Technology, Department of Chemical Engineering, Applied Electrochemistry; UMSA (Universidad Mayor de San Andres), Department of Inorganic Chemistry and Materials Science/Advanced Materials, and IIQ Chemical Research Institute.

Funding Information:
Acknowledgments: The authors greatly acknowledge the financial support by: SIDA (Swedish International Development Agency); KTH Royal Institute of Technology, Department of Chemical Engineering, Applied Electrochemistry; UMSA (Universidad Mayor de San Andres), Department of Inorganic Chemistry and Materials Science/Advanced Materials, IIQ Chemical Research Institute.

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Conducting polymers
  • Hybrid materials
  • Lithium-ion batteries
  • PANI, LiFePO

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