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

Authors

Yanshuang Meng, Lanzhou University of TechnologyFollow
Jun Xia, Lanzhou University of TechnologyFollow
Lei Wang, Lanzhou University of Technology
Gongrui Wang, Lanzhou University of Technology
Fuliang Zhu, Lanzhou University of Technology
Yue Zhang, Georgia Southern UniversityFollow

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.

Recommended Citation

Meng, Yanshuang, Jun Xia, Lei Wang, Gongrui Wang, Fuliang Zhu, Yue Zhang. 2018. "A Comparative Study on LiFePO₄/C by In-Situ Coating with Different Carbon Sources for High-Performance Lithium Batteries." Electrochimica Acta, 261: 96-103. doi: 10.1016/j.electacta.2017.12.127 source: https://www.x-mol.com/paper/499495
https://digitalcommons.georgiasouthern.edu/manufact-eng-facpubs/29