复合聚合物电解质与离子液体接种-拉波尼特,用于无树的全固态金属电池
Biyu Jin1,2, Dongyun Wang3, Yuan He1
1School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Coal Clean Conversion and High Valued Utilization, Anhui University of Technology Maanshan 243002 China wanchao@zju.edu.cn.
Chemical science
|July 28, 2023
概括
这项研究引入了一种新的复合聚合物电解质 (CPE),使用改性拉波尼特颗粒和离子液体. 这种先进的材料通过增强离子导电性和稳定性来提高电池性能,克服了当前离子电池的局限性.
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
- 聚合物科学 聚合物科学
背景情况:
- 复合聚合物电解质 (CPE) 与电池中的液体电解质相比,具有潜在的优势.
- 挑战包括/电解质接口上的寄生反应和无机填充物的不稳定性.
研究的目的:
- 增强基于聚乙烯氧化物 (PEO) 的CPE的热,机械和电化学性能.
- 为改善电池应用,解决当前CPE中的空气不稳定性和接口问题.
主要方法:
- 在表面边缘带有相反电荷的拉波尼特 (LAP) 多层颗粒上接种伊米达离子液 (IL-TFSI).
- 将LAP-IL-TFSI纳入PEO矩阵,以创建先进的CPE.
- 对称Li电池和LiFePO4干电池CPE干电池的电化学测试.
主要成果:
- 经过修改的CPE (CPE-0.2LAP-IL-TFSI) 实现了高离子导电性 (1.5 × 10-3 S cm-1) 和0.53的离子转移数.
- 抑制了树的生长,延长了对称的Li细胞循环寿命超过1000小时.
- 证明了良好的容量保留 (在2°C,60°C的500个循环后80%),以及与高压阴极的兼容性.
结论:
- 开发的LAP-IL-TFSI修改CPE具有卓越的电化学性能和稳定性.
- 这种材料对下一代离子电池充满希望,克服了现有技术的关键局限性.
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