Morphology and Electrical Conductivity of Carbon Nanocoatings Prepared from Pyrolysed PolymersReportar como inadecuado




Morphology and Electrical Conductivity of Carbon Nanocoatings Prepared from Pyrolysed Polymers - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Journal of Nanomaterials - Volume 2014 2014, Article ID 103418, 7 pages -

Research ArticleFaculty of Chemistry, Jagiellonian University, Ingardena 3 Street, 30-060 Krakow, Poland

Received 1 December 2013; Revised 13 March 2014; Accepted 14 March 2014; Published 13 April 2014

Academic Editor: Yu-Lun Chueh

Copyright © 2014 Marcin Molenda et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Conductive carbon nanocoatings conductive carbon layers—CCL were formed on -Al2O3 model support using three different polymer precursors and deposition methods. This was done in an effort to improve electrical conductivity of the material through creating the appropriate morphology of the carbon layers. The best electrical properties were obtained with use of a precursor that consisted of poly-N-vinylformamide modified with pyromellitic acid PMA. We demonstrate that these properties originate from a specific morphology of this layer that showed nanopores 3-4 nm capable of assuring easy pathways for ion transport in real electrode materials. The proposed, water mediated, method of carbon coating of powdered supports combines coating from solution and solid phase and is easy to scale up process. The optimal polymer carbon precursor composition was used to prepare conductive carbon nanocoatings on LiFePO4 cathode material. Charge-discharge tests clearly show that C-LiFePO4 composites obtained using poly-N-vinylformamide modified with pyromellitic acid exhibit higher rechargeable capacity and longer working time in a battery cell than standard carbon-lithium iron phosphate composites.





Autor: Marcin Molenda, Michał Świętosławski, Marek Drozdek, Barbara Dudek, and Roman Dziembaj

Fuente: https://www.hindawi.com/



DESCARGAR PDF




Documentos relacionados