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Self-assembly LiFePO4/polyaniline composite cathode materials with inorganic acids as dopants for lithium-ion batteries
- Source :
-
Journal of Electroanalytical Chemistry . Sep2011, Vol. 660 Issue 1, p108-113. 6p. - Publication Year :
- 2011
-
Abstract
- Abstract: Carbon-coated LiFePO4 (C-LFP) composites incorporated with electrochemically-active conducting polymer polyaniline (PANI) are fabricated via a self-assembly process. Inorganic acids HCl, H2SO4 and H3PO4 are used as dopants for PANI. The C-LFP/PANI composites are characterized by thermogravimetric analysis, scanning electron microscopy, electrochemical impedance spectroscopy, Raman spectra and four-probe resistivity measurements. Our results show that a remarkable improvement in capacity and rate capability can be achieved in the C-LFP/PANI composite cathodes doped with HCl and H3PO4. The C-LFP/PANI-HCl composite exhibits the best electrochemical performance, which gives a ca. 15% capacity enhancement at 0.2C and 40% enhancement at 5C compared to the parent C-LFP. The mechanism for the enhancement has been discussed. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 15726657
- Volume :
- 660
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Electroanalytical Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 64484436
- Full Text :
- https://doi.org/10.1016/j.jelechem.2011.06.013