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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
高稳定,离子导电,形共聚合物用于性燃料电池
Nanwen Li1, Yongjun Leng, Michael A Hickner
1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Journal of the American Chemical Society
|June 1, 2013
概括
新的形聚合物为性燃料电池提供持久的离子导电性. 在性燃料电池应用中,C-6侧链聚合物表现出卓越的长期性能和稳定性.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 开发持久的阳离子导电聚合物电解质对于推进性燃料电池 (AFC) 技术至关重要.
- 现有的聚合物电解质在操作条件下经常面临稳定性和导电性方面的挑战.
研究的目的:
- 为AFC应用合成和表征具有形结构的新型四元化聚二甲氧化物.
- 研究基侧链长度与由此产生的聚合物电解质的离子导电性和化学稳定性之间的关系.
主要方法:
- 通过Menshutkin反应合成形聚合物.
- 使用小角度X射线散射 (SAXS) 分析离子域形成的特征.
- 在加速老化条件下评估化学稳定性 (在80°C下2000小时内1M NaOH).
- 制造和测试使用合成聚合物作为催化剂层中的离子体的AFC.
主要成果:
- 带有单一,长基侧链的形聚合物表现出增强的氧导电性.
- 使用二甲基二甲基氨基酸 (C-16) 获得了最高的导电性.
- 膜显示出出色的化学稳定性,在长时间暴露在恶劣的性条件下后,保持高离子导电性.
- AFC的性能表明,C-6侧链离子体在经过60小时的运行后保留了90%的初始性能,在耐用性方面表现优于C-16离子体.
结论:
- 具有适当基侧链长度的形聚合物是AFC中耐用离子导电解质的有希望的候选物.
- 与较长链的变种相比,C-6侧链聚合物提供了导电性和长期耐用性的优越平衡.
- 这些发现为下一代性燃料电池技术中的改进材料铺平了道路.
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