Functionalization of MWCNTs by plasma treatment and use as conductive additives for LiFePO4 electrode

Si Xian Wu, Chih Lien Chiang, Cheng Chien Wang, Chuh Yung Chen

研究成果: Article

4 引文 斯高帕斯(Scopus)

摘要

The application of LiFePO4 in high power battery is limited by its low conductivity. MWCNTs as conductive additives were functionalized with maleic anhydride (MA) using the plasma-induced grafting technique. A series of LiFePO4/MWCNTs-MA composite electrodes with 1.7 wt%, 2.7 wt%, 4.7 wt%, and 9.7 wt% of MWCNTs-MA were fabricated to improve conductivity and to investigate the effects of MWCNTs-MA on LiFePO4 electrode performance. X-ray diffraction analysis of LiFePO4/MWCNTs-MA cathodes showed that crystallinity and lattice spacing of LiFePO4 were not altered by incorporation of MWCNTs-MA. Field-emission scanning electronic microscopy showed that 4.7 wt% MWCNTs-MA dispersed well in LiFePO4 particle matrix. Electrochemical impedance spectroscopy showed that charge transfer resistance was decreased by increased amount of MWCNTs-MA. The specific capacity, cyclic stability, and rate performance of LiFePO4 coin cells were enhanced by increased amount of MWCNTs-MA, and reaching optimal performance at 4.7 wt%. The LiFePO4/MWCNTs-MA (4.7 wt%) battery had rate capacity of 114 mAh g−1 at 1 C with a capacity retention ratio of 75.6% after 200 cycles.

原文English
頁(從 - 到)208-214
頁數7
期刊Journal of the Taiwan Institute of Chemical Engineers
89
DOIs
出版狀態Published - 2018 八月

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

指紋 深入研究「Functionalization of MWCNTs by plasma treatment and use as conductive additives for LiFePO<sub>4</sub> electrode」主題。共同形成了獨特的指紋。

  • 引用此