基于聚碳酸的聚合物电解质 聚二甲二甲三甲碳酸)
David A Sundermann1, Bumjun Park2, Valerian Hirschberg1
1Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesser Str. 18-20, D-76131 Karlsruhe, Germany.
ACS omega
|July 10, 2023
概括
研究人员使用聚碳酸盐和盐开发了用于电池的新型电解质. 一种配方HFIP40表现出聚合物在盐中的行为和高氧化稳定性,这对于先进的电池开发至关重要.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 电池由于的丰富性和安全性,比离子电池具有潜在的优势.
- 开发稳定和导电电解质对于推进电池技术至关重要.
研究的目的:
- 为了合成和描述电池的新型聚合物电解质 (PE).
- 为了研究从聚合物中的盐到聚合物中的盐电解质行为的过渡.
- 评估这些PE的电化学性能和稳定性.
主要方法:
- 通过环开聚合合成的聚二甲基二甲基三甲酸 (P(BEC)) 的合成.
- 用不同度的四 (((hexafluoroisopropyloxy) 酸盐 (Mg (((B ((HFIP) 4) 2) 和二 (((trifluoromethanesulfonyl) imide (Mg ((TFSI) 2)) 2) 制备PE.
- 使用阻抗光谱,DSC,风学,循环电压测量和拉曼光谱进行了表征.
主要成果:
- 对于具有40mol%Mg{B}{HFIP}4) 2 (HFIP40) 的PE,观察到过渡到聚合物-盐电解质,由玻璃过渡温度和风湿性质的变化表明.
- HFIP40显示出高离子导电性和超过6V的氧化稳定性窗口,与Mg/Mg2+相比.
- 带有Mg的PE () 主要表现出经典的聚合物中的盐行为.
结论:
- 该研究成功地证明了聚合物-盐中电解质与Mg{B}{HFIP}4) 2的形成,为稳定的电池电解质提供了一个有希望的途径.
- 虽然HFIP40显示出优异的氧化稳定性,但需要进一步的研究来解决缺乏可逆剥离-板行为实际电池应用.
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