A LiFePO4 regeneration method based on PVAc alcoholysis reaction
| Autor: | Xu Lin, Lingyu Guan, Tao Qiu, Meihua Liu, Tangbangguo Zhou, Fan Yu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
060102 archaeology Renewable Energy Sustainability and the Environment Scanning electron microscope 020209 energy chemistry.chemical_element 06 humanities and the arts 02 engineering and technology Electrochemistry symbols.namesake Ammonia chemistry.chemical_compound Chemical engineering chemistry X-ray photoelectron spectroscopy Transmission electron microscopy 0202 electrical engineering electronic engineering information engineering symbols 0601 history and archaeology Methanol Raman spectroscopy Carbon |
| Zdroj: | Renewable Energy. 175:559-567 |
| ISSN: | 0960-1481 |
| DOI: | 10.1016/j.renene.2021.04.129 |
| Popis: | Regeneration of LiFePO4 from spent LiFePO4 cathode material has been proposed by using a new carbon source in the mixture system of methanol and ammonia water. Adding appropriate Li2CO3, FeC2O4, and NH4H2PO4, the spent LiFePO4 materials were regenerated through high-temperature solid-state reaction with the different amounts of PVAc. Compared with traditional regeneration methods, the addition of carbon sources was greatly reduced in this work. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), Raman spectra, X-ray photoelectron spectroscopy (XPS), and electrochemical measurement. According to these results, the regenerated sample with 2.5 wt% PVAc displayed the best morphology, structure, and electrochemical performance. It delivered a high initial capacity of 163.2 mA h g−1 at the rate of 0.1 C, and a high capacity retention of 97.08% at a rate of 0.5 C after 100 cycles, which could meet the commercial requirements of regenerated LiFePO4 batteries to a certain extent. The optimum amount of PVAc still needs further study. |
| Databáze: | OpenAIRE |
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