The Effect of Crystalline Microstructure of PVDF Binder on Mechanical and Electrochemical Performance of Lithium-Ion Batteries Cathode
| Autor: | Mohsen Babaiee, Rahim Eqra, Najme Lari, Mohammad Mohsen Loghavi, Mohammad Hadi Moghim, Saeed Bahadorikhalili |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Microstructure 01 natural sciences Cathode 0104 chemical sciences law.invention Ion Chemical engineering chemistry law Lithium Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Zeitschrift für Physikalische Chemie. 234:381-397 |
| ISSN: | 2196-7156 0942-9352 |
| DOI: | 10.1515/zpch-2018-1343 |
| Popis: | In this paper, the effect of the crystalline microstructures of polyvinylidene fluoride (PVDF), as cathode binder, on mechanical and electrochemical properties of the cathode, and on the cell performance is investigated. The crystalline phases of the PVDF films prepared at different temperatures are determined by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) and also mechanical strength of PVDF films evaluated by a tensile test. The cathodes were prepared at altered temperatures to achieve different PVDF phases. The effect of various crystalline phases on the cathode performance was studied. The obtained cathodes were analyzed by scanning electron microscope (SEM), contact angle measurement, and adhesion test. The electrochemical performance of the cathodes was evaluated by charge-discharge cycling test and AC impedance spectroscopy. Mechanical tests results showed that the cathode which is prepared at 60 °C has the best adhesion and mechanical stability. In addition, the charge-discharge cycling studies showed that this cathode has the highest capacity efficiency. AC impedance spectroscopy illustrated that this electrode has the lowest charge transfer resistance and SEI resistance. |
| Databáze: | OpenAIRE |
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