Title

A Comparative Study on LiFePO4/C by In-Situ Coating with Different Carbon Sources for High-Performance Lithium Batteries

Document Type

Article

Publication Date

1-20-2018

Publication Title

Electrochimica Acta

DOI

10.1016/j.electacta.2017.12.127

ISSN

0013-4686

Abstract

LiFePO4/C materials are synthesized via in-situ coating of LiFePO4 by using 1-butyl-3-methylimidazolium dicyanamide ([BMIm][N(CN)2]) and glucose as carbon sources, respectively. The structure characterization results indicate that the carbon sources have no effect on the LiFePO4 particles, but have remarkable influence on the coated carbon films. It is found that the [BMIm][N(CN)2] carbon source leads to ultrathin (1–2 nm), uniform and highly graphitized carbon films. Due to this unique structure, the electrode materials fabricated by using [BMIm][N(CN)2] exhibit a superior electrode reaction reversibility, a capacity retention of 160.6 mAhg−1 (1.47% decay rate) after 50 cycles and a specific discharge capacity of 143.6 mAhg−1 at 1C, which is much better than the performance of the electrode materials synthesized with glucose.

Share

COinS