NDLI: Synthesis and electrochemical characterization of LiFePO4/C-polypyrrole composite prepared by a simple chemical vapor deposition method

Content Provider	Springer Nature Link
Author	Gong, Qiang He, Yu Shi Yang, Yang Liao, Xiao Zhen Ma, Zi Feng
Copyright Year	2011
Abstract	A LiFePO4/C-polypyrrole (LiFePO4/C-PPy) composite as a high-performance cathode material is successfully prepared through a simple chemical vapor deposition (CVD) method. According to the transmission electron microscope (TEM) analysis, the surface of the LiFePO4/C is surrounded with PPy in the LiFePO4/C-PPy composite. The as-prepared LiFePO4/C-PPy material shows outstanding rate capability at 20°C and good cycle performance at 55°C in comparison with those of the bare LiFePO4/C material against Li anode. After 700 cycles, the discharge capacity of LiFePO4/C-PPy could still remain 110 mA h g−1 with the retention of 82% at 5 C rate at 55°C. This could be ascribed to the fact that PPy coating on LiFePO4/C could significantly improve the ionic conductivity of the LiFePO4/C-PPy composite and could greatly reduce the electrode resistance. Furthermore, the PPy coating on LiFePO4/C could effectively decrease the dissolution of Fe in the LiPF6 electrolyte and subsequently suppress the reduction of Fe ions on anode.
Starting Page	1383
Ending Page	1388
Page Count	6
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	16
Issue Number	4
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-08-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	LiFePO4 Polypyrrole Chemical vapor deposition Cathode Lithium batteries Physical Chemistry Characterization and Evaluation of Materials Energy Storage Condensed Matter Physics Analytical Chemistry Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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