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

Abstract

(2012), Synthesis and electrochemical characterization of LiFePO4/C-polypyrrole composite prepared by a simple chemical vapor deposition method, Journal of Solid State Electrochemistry, 16(4), pp. 1383-1388. Synthesis and electrochemical characterization of LiFePO4/Cpolypyrrole composite prepared by a simple chemical vapor deposition method AbstractA LiFePO 4 /C-polypyrrole (LiFePO 4 /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 LiFePO 4 /C is surrounded with PPy in the LiFePO 4 /C-PPy composite. The as-prepared LiFePO 4 /C-PPy material shows outstanding rate capability at 20°C and good cycle performance at 55°C in comparison with those of the bare LiFePO 4 /C material against Li anode. After 700 cycles, the discharge capacity of LiFePO 4 /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 LiFePO 4 /C could significantly improve the ionic conductivity of the LiFePO 4 /C-PPy composite and could greatly reduce the electrode resistance. Furthermore, the PPy coating on LiFePO 4 /C could effectively decrease the dissolution of Fe in the LiPF 6 electrolyte and subsequently suppress the reduction of Fe ions on anode.

Synthesis and Characterization of LiFePO4–PANI Hybrid Material as Cathode for Lithium-Ion Batteries

“…The Li + moves through the network of the LiFePO 4 structure and the PANI structure to the electrolyte. The electrochemical results of the LiFePO 4 -PANI reported in this study are similar to those of other works [12,[40][41][42][43][44]. The specific capacity of LiFePO 4 -PANI depends of the methods of the synthesis, dopants in PANI and the electrochemical properties of the LiFePO 4 .…”

Unveiling the Impact of the Polypyrrole Coating Layer Thickness on the Electrochemical Performances of LiNi0.5Co0.2Mn0.3O2 in Li–Ion Battery

“…Even for Li−S batteries, the performances of PPy‐coated sulfur‐based cathodes have been improved to some extent . Even though many works about coating PPy on the surface of cathode materials have been carried on to improve their electrochemical performances, the effect of the PPy layer thickness on the electrochemical performance of electrode materials is still unclear.…”

Synthesis and electrochemical performance of LiV3O8/polyaniline as cathode material for the lithium battery

“…Moreover, conducting polymers can suppress the dissolution of active materials into the LiPF 6 electrolyte [13][14][15]. Up to now, many electrode materials combined with polymers, for example, SnO 2 /polypyrrol [16], sulphur/polypyrrole [17], LiMn 2 O 4 /polypyrrole [14], LiFePO 4 /polypyrrole [18,19], LiFePO 4 /polyaniline [20], V 2 O 5 /polyaniline [21], and LiV 3 O 8 /polypyrrole [22,23] have been synthesised and have shown improved cycling performance in lithium cells.…”