Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 208-214 |
| Number of pages | 7 |
| Journal | Journal of the Taiwan Institute of Chemical Engineers |
| Volume | 89 |
| DOIs | |
| Publication status | Published - 2018 Aug 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
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Functionalization of MWCNTs by plasma treatment and use as conductive additives for LiFePO4 electrode. / Wu, Si Xian; Chiang, Chih Lien; Wang, Cheng Chien; Chen, Chuh-Yung.
In: Journal of the Taiwan Institute of Chemical Engineers, Vol. 89, 01.08.2018, p. 208-214.Research output: Contribution to journal › Article
TY - JOUR
T1 - Functionalization of MWCNTs by plasma treatment and use as conductive additives for LiFePO4 electrode
AU - Wu, Si Xian
AU - Chiang, Chih Lien
AU - Wang, Cheng Chien
AU - Chen, Chuh-Yung
PY - 2018/8/1
Y1 - 2018/8/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jtice.2018.04.026
DO - 10.1016/j.jtice.2018.04.026
M3 - Article
VL - 89
SP - 208
EP - 214
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
SN - 1876-1070
ER -