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灵活的复合电解质膜具有固态电池的快速离子运输通道

Xiaojun Ma¹, Dongxu Mao¹, Wenkai Xin¹

¹School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.

|March 13, 2024

概括

研究人员开发了一种灵活的复合电解质膜 (FCPE),用于更安全的全固态电池. 这种新型膜具有增强的离子导电性和稳定性,为实际应用铺平了道路.

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:

复合聚合物电解质 (CPE) 膜对于所有固态电池 (SSB) 是至关重要的.
现有的CPE在离子导电性和机械强度方面面临挑战,这限制了它们的实际使用.
开发先进的电解质是提高SSB安全性和性能的关键.

研究的目的:

为所有固态电池设计和制造具有增强离子传输的柔性复合电解质膜 (FCPE).
调查新型FCPE的结构和电化学特性.
评估使用FCPE的SSB的循环稳定性和性能.

主要方法:

使用相转换和现场聚合制造制造FCPE.
纳入聚乙烯化物-六烯 (PVDF-HFP) 和晶酸 (LLZTO),形成一个3D网状结构.
在现场聚合聚乙烯碳酸 (PVEC),以改善接口接触.

主要成果:

FCPE展示了一个3D网络结构,具有快速的Li+运输通道,促进了统一的沉积.
对称的电池在1200小时的0.1 mA cm-2循环中表现出高稳定性.
带有LiFePO4阴极的全固态电池在室温下稳定循环超过100个周期,库伦比效率高.
红外光谱学证实了FCPE在100个周期后的结构稳定性.

结论:

开发的FCPE为提高固态电解质的离子导电性和机械性能提供了一个有前途的解决方案.
独特的3D网络结构促进了高效的离子运输和稳定的金属阳极循环.
这项工作为设计高性能,灵活的复合电解质提供了一种新的策略,用于更安全,更可靠的全固态电池.

关键词:

在PVDF-HFP/LLZTO 在PVEC中,PVEC是PVEC.柔性复合物电解质电解质的使用一个类似网状的结构.

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