在现场制造无溶剂固体聚合物电解质,用于高温全固态金属电池
Huihui Gan1, Mingyu Cui1, Liang Li1
1State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China.
Langmuir : the ACS journal of surfaces and colloids
|September 20, 2024
概括
无溶剂的固体聚合物电解质 (SPEs) 为更安全的全固态金属电池 (ASSLMB) 开发. 这些新型SPE显示出出色的性能和稳定性,为高能量密度电池铺平了道路.
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:
- 全固态金属电池 (ASSLMB) 对于更安全的可充电电池至关重要,但当前的凝聚合物电解质保留着易燃的液体溶剂.
- 现有的电解质带来了安全风险,需要开发真正稳固和安全的替代品来进行先进的能量存储.
研究的目的:
- 设计和制造全固态金属电池 (ASSLMBs) 的新型无溶剂深性固体聚合物电解质 (SPEs).
- 通过开发稳定高性能固态系统,解决可充电电池中的液态电解质相关的安全问题.
主要方法:
- 使用PVDF-HFP电膜,Succinonitrile (SN),PEGDA200,LiTFSI和LiDFOB的现场聚合制造SPE的制造.
- SPE属性的表征,包括离子导电性,电化学稳定性和与金属阳极的兼容性.
- 组装和测试不对称的电池 (Li//LiMn0.6Fe0.4PO4,Li//LiFePO4,Li//LiNi0.8Co0.1Mn0.1O2),以评估循环性能和速度能力.
主要成果:
- 开发的SPEs表现出优越的室温离子导电性,这是由于SN/LiTFSI深度溶解剂.
- PVDF-HFP膜提供了一个3D纳米纤维网络,增强了电化学稳定性和离子转移.
- 使用这些SPE组装的不对称电池在广泛的温度范围内表现出极好的循环性能和速度能力.
结论:
- 无溶剂的深层欧特克质SPEs为提高ASSLMB的安全性和性能提供了一个有前途的解决方案.
- 一个DES和一个交叉链接的聚合物网络的组合创造了一个强大的电解质,用于高能量密度电池应用.
- 这一战略推动了实用且安全的全固态金属电池的开发.
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