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Polyaniline-Coated Na3V2(PO4)2F3 Cathode Enables Fast Sodium Ion Diffusion and Structural Stability in Rechargeable Batteries.
Missaoui, Kahla; Ferchichi, Karima; Amdouni, Noureddine; Gómez-Cámer, Juan Luis; Pérez-Vicente, Carlos; Bonilla, Alvaro; Cosano, Daniel; Caballero, Álvaro; Ortiz, Gregorio F.
Afiliación
  • Missaoui K; Laboratory of Characterizations, Applications and Modeling of Materials, Faculty of Sciences of Tunis-University of Tunis El Manar, Campus Farhat Hached, B.P. n° 94 - Rommana, Tunis 1068, Tunisia.
  • Ferchichi K; Laboratory of Characterizations, Applications and Modeling of Materials, Faculty of Sciences of Tunis-University of Tunis El Manar, Campus Farhat Hached, B.P. n° 94 - Rommana, Tunis 1068, Tunisia.
  • Amdouni N; Laboratory of Characterizations, Applications and Modeling of Materials, Faculty of Sciences of Tunis-University of Tunis El Manar, Campus Farhat Hached, B.P. n° 94 - Rommana, Tunis 1068, Tunisia.
  • Gómez-Cámer JL; Department of Inorganic Chemistry and Chemical Engineering, Chemical Institute for Energy and the Environment (IQUEMA), University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
  • Pérez-Vicente C; Department of Inorganic Chemistry and Chemical Engineering, Chemical Institute for Energy and the Environment (IQUEMA), University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
  • Bonilla A; Department of Inorganic Chemistry and Chemical Engineering, Chemical Institute for Energy and the Environment (IQUEMA), University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
  • Cosano D; Department of Organic Chemistry, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
  • Caballero Á; Department of Inorganic Chemistry and Chemical Engineering, Chemical Institute for Energy and the Environment (IQUEMA), University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
  • Ortiz GF; Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China.
ACS Appl Mater Interfaces ; 2024 Jul 31.
Article en En | MEDLINE | ID: mdl-39084941
ABSTRACT
Na3V2(PO4)2F3 (NVPF), a typical sodium superionic conductor (NASICON) type structure, has attracted much interest as a potential positive electrode in sodium-ion battery. However, the inherently poor electronic conductivity of phosphates compromises the electrochemical properties of this material. Here, we develop a general strategy to improve the electrochemical performance by preparing a new composite material "polyaniline (PANI)@NVPF" using a Pickering emulsion method. The X-ray diffraction and Raman results indicated a successful PANI coating without affecting the NASICON-type structure of NVPF, and they enhanced the interfacial bonding between the two components. Also, thermogravimetric analysis and scanning electron microscopy analyses revealed that the PANI content influenced the thermal stability and morphology of the nanocomposites. As a result, the sodium test cells exhibited multielectron reactions and a better rate performance for PANI@NVPF nanocomposites as compared to NVPF. Specifically, 2%PANI@NVPF maintained 70% of its initial capacity at 5C. Ex-situ electron paramagnetic resonance revealed the existence of mixed valence states of vanadium (V4+/V3+) in both discharge and charge processes. Consequently, the successful PANI coating into the sodium superionic conductor framework improved the sodium diffusion channels with a measurable increase of diffusion coefficients with cycling (ca. 3.25 × 10-11 cm2 s-1). Therefore, PANI@NVPF nanocomposites are promising cathode candidates for high-rate sodium-ion battery applications.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Túnez Pais de publicación: Estados Unidos
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Túnez Pais de publicación: Estados Unidos