Issue 114, 2016, Issue in Progress

Stable high-rate cycling electrode based on Li3V2(PO4)3/C using polyamide as a novel carbon source

Abstract

Polyamide, as a novel carbon source, was introduced for the first time into the synthesis of Li3V2(PO4)3/C cathode materials for lithium ion batteries through a carbon-thermal reduction method. The influence of different sintering temperatures on crystal structure, morphology and electrochemical performance of the Li3V2(PO4)3/C composites was investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and electrochemical tests. XRD results indicate that as-prepared Li3V2(PO4)3 is a well crystallized single phase without any impurity phase. SEM and TEM observation demonstrates that a uniform carbon layer with a thickness of about 2–3 nm is coated on Li3V2(PO4)3 particles. The optimal Li3V2(PO4)3/C composite synthesized at 800 °C exhibits a specific capacity of 125.5 mA h g−1 at 1C rate and 94.7% capacity retention when the rate increases from 1C to 10C, presenting a good rate capability. The cross-linking effect of residual carbon from decomposed polyamide plays a critical role in decreasing electron transfer resistance and improving the lithium ion diffusion behavior in Li3V2(PO4)3 particles.

Graphical abstract: Stable high-rate cycling electrode based on Li3V2(PO4)3/C using polyamide as a novel carbon source

Supplementary files

Article information

Article type
Paper
Submitted
11 Sep 2016
Accepted
26 Nov 2016
First published
28 Nov 2016

RSC Adv., 2016,6, 113228-113233

Stable high-rate cycling electrode based on Li3V2(PO4)3/C using polyamide as a novel carbon source

J. Yan, Y. Cao and F. Liu, RSC Adv., 2016, 6, 113228 DOI: 10.1039/C6RA22714G

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