基于多个环氧组的交联凝聚合物电解质,使离子电池的导电性和高性能成为可能
Wei Zhang1, Wansu Bae1, Lei Jin1
1Department of Applied Chemistry, Konkuk University, Chungju-si 27478, Republic of Korea.
Gels (Basel, Switzerland)
|May 26, 2023
概括
使用环氧化大豆油的新型交联凝聚合物电解质 (C-GPE) 提高了离子电池的性能. 这种先进的电解质为高性能电池提供了更好的离子导电性和界面稳定性.
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:
- 低离子导电率和不稳定的接口阻碍了离子电池 (LiB) 的发展.
- 开发先进的电解质对于下一代能源储存至关重要.
研究的目的:
- 合成交联凝聚合物电解质 (C-GPE),以提高LiB的性能.
- 调查新型C-GPE的特性和电化学行为.
主要方法:
- 在现场热聚合氧化大豆油 (ESO) 用二 (LiFSI) 作为启动剂.
- 加入乙烯碳酸/二乙烯碳酸 (EC/DEC) 以提高电解质性能.
- 在石墨/LiFePO4细胞中的C-GPE的电化学表征.
主要成果:
- 在30°C时,C-GPE-2显示出一个宽的电化学窗口 (5.19 V) 和0.23 × 10−3 S/cm的离子导电性.
- 观察到出色的界面稳定性和低玻璃过渡温度.
- 石墨/LiFePO4电池实现了高特异性容量 (161.3 mAh/g),具有卓越的循环稳定性 (在50个循环后保持98.5%).
结论:
- 开发的C-GPE对高性能LiBs表现出有希望的特性.
- 这项研究为设计先进的凝聚合物电解质提供了宝贵的参考.
- 这些发现有助于克服LiB技术的关键挑战.
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