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2017 ; 10
(4
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
LiV?O?/Polytriphenylamine Composites with Enhanced Electrochemical Performances
as Cathode Materials for Rechargeable Lithium Batteries
#MMPMID28772705
Li W
; Zhu L
; Yu Z
; Xie L
; Cao X
Materials (Basel)
2017[Mar]; 10
(4
): ä PMID28772705
show ga
LiV?O?/polytriphenylamine composites are synthesized by a chemical oxidative
polymerization process and applied as cathode materials for rechargeable lithium
batteries (RLB). The structure, morphology, and electrochemical performances of
the composites are characterized by X-ray diffraction, scanning electron
microscopy, transmission electron microscopy, galvanostatic discharge/charge
tests, and electrochemical impedance spectroscopy. It was found that the
polytriphenylamine particles were composited with LiV?O? nanorods which acted as
a protective barrier against the side reaction of LiV?O?, as well as a conductive
network to reduce the reaction resistance among the LiV?O? particles. Among the
LiV?O?/polytriphenylamine composites, the 17 wt % LVO/PTPAn composite showed the
largest d(100) spacing. The electrochemical results showed that the 17 wt %
LVO/PTPAn composite maintained a discharge capacity of 271 mAh·g(-1) at a current
density of 60 mA·g(-1), as well as maintaining 236 mAh·g(-1) at 240 mA·g(-1)
after 50 cycles, while the bare LiV?O? sample retained only 169 and 148
mAh·g(-1), respectively. Electrochemical impedance spectra (EIS) results implied
that the 17 wt % LVO/PTPAn composite demonstrated a decreased charge transfer
resistance and increased Li? ion diffusion ability, therefore manifesting better
rate capability and cycling performance compared to the bare LiV?O? sample.