阳离子定增强型准固体复合聚合物电解质,用于高性能金属电池
Ruliang Liu1, Xinyi Lai1, Jiaqi Xue1
1School of Chemistry and Materials Science, Guangdong University of Education, Guangzhou 510303, China.
Polymers
|December 23, 2023
概括
这项研究使用ZIF-8粒子和PVDF-HFP开发了先进的固体聚合物电解质,实现了离子电池的高离子导电性和稳定性.
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
- 聚合物科学 聚合物科学
背景情况:
- 固体聚合物电解质对于更安全的离子电池至关重要.
- 开发具有高离子导电性和稳定的电解质仍然是一个挑战.
研究的目的:
- 为了准备和优化ZIF-8增强PVDF-HFP固体复合聚合物电解质.
- 研究开发的电解质的电化学性能和树抑制特性.
主要方法:
- 通过叶片涂层制造通过ZIF-8无机颗粒增强的聚 (乙烯基化物-co-hexafluoropropylene) (PVDF-HFP) 固体复合聚合物电解质.
- 引入一种增塑剂,以形成准固态复合电解质 (PH/10%ZIF-8(0.6) / P).
- 在Li/LiFePO4细胞中的离子导电性,Li+转移数和电化学性能的表征.
主要成果:
- 优化的PH/10%ZIF-8(0.6) /P表现出高离子导电性 (2.8 × 10^-4 S cm^-1在30°C) 和优越的Li+转移数 (0.89).
- 超薄的电解质 (26微米) 有效地抑制了树的生长.
- 组装的Li/LiFePO4电池显示出良好的循环稳定性,在0.5°C的100个循环后,容量保持率为89.1%.
结论:
- 开发的ZIF-8增强PVDF-HFP准固态电解质为高性能和安全的离子电池提供了一个有前途的途径.
- ZIF-8颗粒和增塑剂的组合增强了离子导电性和机械稳定性,抑制了树岩的形成.
- 这些电解质显示出下一代储能设备的潜力.
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