1. High-performance polymer electrolyte membrane modified with isocyanate-grafted Ti3+ doped TiO2 nanowires for lithium batteries.
- Author
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Li, Chao, Huang, Ying, Chen, Chen, Feng, Xuansheng, and Zhang, Zheng
- Subjects
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POLYELECTROLYTES , *LITHIUM cells , *POLYMERIC membranes , *NANOWIRES , *CROSSLINKED polymers , *TITANIUM dioxide , *DOPING agents (Chemistry) - Abstract
[Display omitted] • The partly crosslinked polymer electrolyte presents a maximum conductivity of 1× 10−4 S·cm−1 at 30 °C and wide electrochemical window. • The LiFePO 4 ||Li cell exhibits excellent capacity retention of 91% after 100 cycles. • Satisfactory stability for NCM811||Li high-voltage lithium batteries. The Ti3+ doped TiO 2 nanowires were grafted by tolylene-2,4- diisocyanate (TDI) and applied as a modifier for the preparation of organic–inorganic hybrid electrolyte in high performing lithium batteries. The PEO-based polymer electrolyte was optimized at different organic–inorganic ratios and exhibited excellent lithium-ion conductivity of 1 × 10−4 S·cm−1 at 30 °C when adding 8% TDI-TiO 2 nanowires, outstanding electrochemical stability with a wide electrochemical window up to 5.5 V at 60 °C and a high lithium-ion transport number of 0.36. The LiFePO 4 |PTTNW8%|Li cells deliver excellent rate capability and cycling performance, with a high initial discharge capacity up to 151 mAh·g−1 at 60 °C at 0.1 C rate and excellent capacity retention of 91% after 100th cycle. NCM811|PTTNW8%|Li high-voltage lithium batteries were also demonstrated at a 50 °C, which displayed a superior cycling performance. Therefore, the prepared PEO-TDI-TiO 2 electrolyte is a promising polymer electrolyte for solid- state lithium batteries. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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