Enhancement of Thermal Stability and Cycling Performance of Lithium-Ion Battery at High Temperature by Nano-ppy-OMMT-Coated SeparatorReport as inadecuate




Enhancement of Thermal Stability and Cycling Performance of Lithium-Ion Battery at High Temperature by Nano-ppy-OMMT-Coated Separator - Download this document for free, or read online. Document in PDF available to download.

Journal of Nanomaterials - Volume 2017 2017, Article ID 6948183, 10 pages - https:-doi.org-10.1155-2017-6948183

Research Article

School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

Faculty of Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia

Correspondence should be addressed to Xuan Li and Pei Yao

Received 11 November 2016; Revised 10 January 2017; Accepted 19 January 2017; Published 15 February 2017

Academic Editor: Vincenzo Baglio

Copyright © 2017 Shuo Yang 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

Nanopolypyrrole-organic montmorillonite- nano-ppy-OMMT- coated separator is prepared by coating nano-ppy-OMMT on the surface of polyethylene PE. Nano-ppy-OMMT-coated separator with three-dimensional and multilayered network structure is beneficial to absorb more organic electrolyte, enhancing the ionic conductivity reach 4.31 . Meanwhile, the composite separator exhibits excellent thermal stability and mechanical properties. The strong covalent bonds Si-F are formed by the nucleophilic substitution reaction between F

from the thermal decomposition and hydrolysis of LiPF6 and the covalent bonds Si-O of nano-ppy-OMMT. The Si-F can effectively prevent the formation of HF, POF3, and LiF, resulting in the inhibition of the disproportionation of Mn

in LiNi1-3Co1-3Mn1-3O2 material as well as reducing the internal resistance of the cell. Therefore, the nano-ppy-OMMT-coated separator exhibits outstanding capacity retention and cycling performance at 80°C.





Author: Shuo Yang, Huiya Qin, Xuan Li, Huijun Li, and Pei Yao

Source: https://www.hindawi.com/



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