在离子电池中用于高性能阳极的侧链导电和相隔聚合物结合剂
Sang-Jae Park1, Hui Zhao, Guo Ai
1Environmental Energy Technologies Division and ‡Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
Journal of the American Chemical Society
|February 4, 2015
概括
具有烯侧链的新导电聚合物作为电池中电极的结合剂. 这些结合剂在许多充电周期中提高了电极的稳定性和性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 开发先进的电极结合剂对于高性能离子电池至关重要.
- 阳极提供高容量,但受到体积膨胀和循环稳定性差的影响.
- 导电性聚合物粘合剂可以提高电极完整性和导电性.
研究的目的:
- 合成和表征新型导电聚合物,用于电极中的粘合剂.
- 评估使用这些新结合剂的电极的电化学性能和循环稳定性.
- 研究聚合物结构对电极机械完整性和固体电解质介相 (SEI) 形成的作用.
主要方法:
- 用烯侧链合成甲基酸盐聚合物.
- 使用合成的聚合物作为结合剂制造电极.
- 电化学测试包括容量,速率性能和长期循环.
- 电子流动性和电极形态的表征.
主要成果:
- 合成的烯基甲酸聚合物表现出高的电子流动性 (高达8.5 × 10−4 cm2 V−1 s−1).
- 导电聚合物粘合剂有效地保持了电极的机械完整性和1000个循环的接口稳定性.
- 用这些粘合剂组装的电池显示出高容量,优异的速率能力和增强的SEI稳定性.
- 在高负载电极中,将乙烯氧化物部分纳入改善了粘合力和控制了胀.
结论:
- 基于二烯侧链 π-π 堆叠的导电聚合物非常适合作为电极的结合剂.
- 这些结合剂显著提高了基于的电池的电化学性能和长期循环稳定性.
- 定制聚合物侧链为先进的电池应用优化粘合剂特性提供了一种多功能方法.
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