Plasticized polymer electrolyte membranes based on PEO/PVdF-HFP for use as an effective electrolyte in lithium-ion batteries

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• 作者：Pradeepa Prabakaran ; Ramesh Prabhu Manimuthu…
• 关键词：X ; ray diffraction ; Impedance spectroscopy ; Atomic force microscopy ; Ionic conductivity ; Dielectrics
• 刊名：Chinese Journal of Polymer Science
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：35
• 期：3
• 页码：407-421
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials; Condensed Matter Physics;
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS
• ISSN：1439-6203
• 卷排序：35

文摘

Plasticized polymer electrolytes were prepared using poly(ethylene oxide) (PEO)/poly(vinylidene fluoride-hexafluoro propylene) (PVdF-HFP) with lithium perchlorate (LiClO₄) and different plasticizers. XRD and FTIR spectroscopic techniques were used to characterize the structure and the complexation of plasticizer with the host polymer matrix. The role of interaction between polymer hosts and plasticizer on conductivity is discussed using the results of alternating current (a.c.) impedance studies. TG-DTA and SEM were used for thermal and physical characterizations. Maximum ionic conductivity (3.26 × 10₋₄ S·cm₋₁) has been observed for ethylene carbonate (EC)-based polymer electrolytes. Electrochemical performance of the plasticized polymer electrolyte is evaluated in LiFePO₄/plasticized polymer electrolytes (PPEs)/Li coin cell. Good performance with low capacity fading on charge discharge cycling is demonstrated.