PAni-coated LiFePO4 Synthesized by a Low Temperature Solvothermal Method

• Autor(a) principal: Fagundes,Wélique Silva
• Data de Publicação: 2019
• Outros Autores: Xavier,Farlon Felipe Silva, Santana,Laiane Kalita, Azevedo,Matheus Ezequiel, Canobre,Sheila Cristina, Amaral,Fábio Augusto
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Materials research (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000100222
• topic: solvothermal synthesis; PAni coated LiFePO4; composites; cathode lithium batteries

The composite LiFePO4/polyaniline was prepared by chemical synthesis to promote the intensification of the electrochemical properties for use as cathodes in lithium ion batteries. The X-ray diffraction (XRD) of LiFePO4 synthesized by solvothermal method were indexed to the orthorhombic structure, according to the JCPDS 40-1499. The spectra Raman and FTIR showed a high degree of ordering of LiFePO4 with interaction between LiFePO4 surface with structure conjugate of conducting polymers. The cyclic voltammogram of the composite synthesized chemically showed a significant reduction in the value of ΔE p (ΔE p = 0.20 V) when compared to LiFePO4 (ΔE p = 0.41 V), with lower charge transfer resistance values, indicating favoring electron transfer rate in the composite. Thus, the alternative synthesis route of the LiFePO4 / PAni composite was easy to handle and allowed an increase in the electrochemical properties of the LiFePO4, compared to the traditional methods that require additional thermal treatments.