A superior composite gel polymer electrolyte of Li7La3Zr2O12- poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) for rechargeable solid-state lithium ion batteries
- Zhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, 318000, Zhejiang (China)
Highlights: • Solid electrolyte LLZO dispersed in PVDF-HFP matrix is studied. • Garnet inorganic fillers enhance the transport number of Li{sup +}. • Composite polymer electrolytes show superior electrochemical performance. • Coin cells (Li/PVDF-HFP: LLZO/LiFePO{sub 4}) show good cycling performance. - Abstract: High-quality solid electrolyte is essential for the growing need of lithium ion batteries. Herein, we report a novel organic-inorganic composite electrolyte based on Li{sub 7}La{sub 3}Zr{sub 2}O{sub 12} ceramic powder incorporated into PVDF-HFP through a simple combined method. At room temperature, the composite polymer electrolyte (CPE) possesses a good ionic transmission improvement of 3.71 × 10{sup −4} S cm{sup −1}. The CPE behaves a fine lithium ion transference number of 0.58 and an electrochemical window of up to 4.65 V. CPEs display meliorative electrochemical stability compared to pure PVDF-HFP electrolyte. The cathode presents an excellent initial discharge capacity of 163.1 mAh g{sup −1} at 0.2 C in Li/CPE/LiFePO{sub 4} cell. The cell with CPE displays much better capacity retention than that with pure PVDF-HFP electrolyte. The Li{sub 7}La{sub 3}Zr{sub 2}O{sub 12} modified PVDF-HFP is a promising electrolyte for lithium ion batteries.
- OSTI ID:
- 22804026
- Journal Information:
- Materials Research Bulletin, Vol. 102; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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