用于离子电池的PVDF-HFP/纤维素/PVDF-HFP膜的电三明治状结构
Xingfu Zi1, Hongming Wu2, Jiling Song2
1Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
Molecules (Basel, Switzerland)
|July 14, 2023
概括
使用纤维素和PVDF-HFP的新复合膜为离子电池提供了增强的稳定性和性能. 与传统的聚烯选项相比,这种环保的分离器显示出优越的离子导电性和循环.
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:
- 纤维素膜是环保的电池分离器,但缺乏循环稳定性.
- 开发具有提高性能的可持续分离器对于先进的电池至关重要.
研究的目的:
- 为增强的离子电池分离器创建一种新的复合膜.
- 为了提高基于纤维素的分离器的循环稳定性和电化学性能.
主要方法:
- 采用两步方法制备一个聚乙烯化物-co-hexafluoropropylene (PVDF-HFP) /纤维素/PVDF-HFP (PCP) 复合膜.
- 溶解和再生纤维素,然后将PVDF-HFP电在其表面.
主要成果:
- 该PCP复合膜显示出高性 (60.71%),抗拉强度 (4.8MPa) 和热稳定性 (160°C).
- 与聚烯 (PP) 分离器相比,它表现出更高的电解质吸收 (710.81 wt.%),较低的界面电阻 (241.39 Ω) 和较高的离子导电率 (0.73 mS/cm).
- PCP膜显示了提高的速率能力 (163.2 mAh/g) 和循环性能 (98.11%后100个循环).
结论:
- PCP复合膜为高功率和安全的离子电池提供了一个有前途的替代方案.
- 这种材料解决了传统纤维素分离器的局限性,提高了电池的安全性和寿命.
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