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Preparation of graphene oxide/natural rubber composites by latex co-coagulation: Relationship between microstructure and reinforcement. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.01.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Loghavi MM, Bahadorikhalili S, Lari N, Moghim MH, Babaiee M, Eqra R. The Effect of Crystalline Microstructure of PVDF Binder on Mechanical and Electrochemical Performance of Lithium-Ion Batteries Cathode. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2018-1343] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Abstract
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.
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Affiliation(s)
- Mohammad Mohsen Loghavi
- Institute of Mechanics, Iranian Space Research Center , Shiraz , Iran , Tel.: +98 71-37201758, Fax: +98 71-37203240
| | | | - Najme Lari
- Institute of Mechanics, Iranian Space Research Center , Shiraz , Iran
| | | | - Mohsen Babaiee
- Institute of Mechanics, Iranian Space Research Center , Shiraz , Iran
| | - Rahim Eqra
- Institute of Mechanics, Iranian Space Research Center , Shiraz , Iran
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