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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Yuanyuan, Liu Junjie, Gu Ning, Nie Feng, Yu Jiao, Wang Jinli, Zhang Wei, Li |
| Copyright Year | 2015 |
| Abstract | A novel composite of LiFePO4 with phosphorus-doped carbon layers has been prepared via a simple hydrothermal method using glucose as the carbon source to generate a carbon coating and triphenylphosphine as the phosphorus source. The effects of phosphorus doping on the phase purity, morphology and electrochemical performance of the materials are studied by the characterizations using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy and electrochemical techniques. It is indicated that phosphorus doping into the carbon layers is beneficial for the graphitization of the carbon. Phosphorus in the carbon layers exists in the form of P–C bonds and its concentration depends on the second calcination temperature. Moreover, the phosphorus-doped carbon layers on the particle surface make the charge transfer resistance decrease remarkably from 156.5 Ω to 49.1 Ω, which can be ascribed to the free carriers donated by phosphorus. The as-prepared LiFePO4 with phosphorus-doped carbon layers calcined at 600 °C shows the best electrochemical performance with a discharge capacity of 124.0 mA h g−1 at a high rate of 20 C and an excellent retention rate of 91.4% after 50 cycles. The LiFePO4 with phosphorus-doped carbon layers exhibits excellent electrochemical performances, especially at high current rates; thus, it is a promising cathode material for high-performance lithium ion batteries. |
| Starting Page | 2043 |
| Ending Page | 2049 |
| Page Count | 7 |
| File Format | HTM / HTML PDF |
| ISSN | 20507488 |
| Volume Number | 3 |
| Issue Number | 5 |
| Journal | Journal of Materials Chemistry A |
| DOI | 10.1039/c4ta05186f |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Raman Carbon Hydrothermal synthesis Glucose Triphenylphosphine Phosphorus Dopant Electrochemistry X-ray crystallography Raman spectroscopy Scanning electron microscope Transmission electron microscopy Calcination Cathode Ion |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Renewable Energy, Sustainability and the Environment Materials Science |
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