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Synthesis and characterization of LiFePO4-PANI hybrid material as cathode for lithium-ion batteries
Universidad Mayor de San Andres, Bolivia; KTH Royal Institute of Technology, Sweden.
Universidad Mayor de San Andres, Bolivia.
Universidad Mayor de San Andres, Bolivia.
RISE Research Institutes of Sweden, Safety and Transport, Electrification and Reliability.ORCID iD: 0000-0002-1226-0788
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2020 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 13, no 12Article in journal (Refereed) Published
Abstract [en]

This work focuses on the synthesis of LiFePO4-PANI hybrid materials and studies their electrochem. properties (capacity, cyclability and rate capability) for use in lithium ion batteries. PANI synthesis and optimization was carried out by chem. oxidation (self-assembly process), using ammonium persulfate (APS) and H3PO4, 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 atm. The pristine and synthesized powders were characterized by XRD, SEM, IR and TGA. The electrochem. 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.

Place, publisher, year, edition, pages
MDPI AG , 2020. Vol. 13, no 12
Keywords [en]
PANI, LiFePO4, conducting polymers, hybrid materials, lithium-ion batteries
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-48795DOI: 10.3390/ma13122834Scopus ID: 2-s2.0-85095423371OAI: oai:DiVA.org:ri-48795DiVA, id: diva2:1469367
Available from: 2020-09-21 Created: 2020-09-21 Last updated: 2020-12-11Bibliographically approved

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Lundblad, Anders Olof

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