在实际固态电池的硫化物/聚合物复合电解质中阐明离子运输现象
Kyeong-Seok Oh1, Ji Eun Lee2, Yong-Hyeok Lee1
1Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
Nano-micro letters
|July 13, 2023
概括
研究人员开发了一种新的对复合固态电解质 (CSEs) 中离子运输的理解,用于固态电池. 这项工作阐明了无机聚合物接口中的离子导电机制,使高性能固态电池成为可能.
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
- 固态电池 固态电池是什么
背景情况:
- 无机/聚合物复合物固态电解质 (CSEs) 对固态电池 (SSB) 有很大的兴趣.
- 然而,CSE内部的基本离子运输机制仍然不太清楚.
- 了解无机聚合物接口上的离子导电对于推进SSB技术至关重要.
研究的目的:
- 阐明CSE中双穿透离子通道形成的机制理解.
- 为了研究通过无机聚合物电解质接口的离子导电.
- 为先进的固态电池开发高性能CSEs.
主要方法:
- 使用 argyrodite 型 Li6PS5Cl (LPSCl) 和具有 Li+-glyme 复合物的凝聚合物电解质 (GPE) 制备模型 CSE.
- 对GPE弹性对LPSCl相透值的影响分析.
- 对Li+-glyme复合物溶解/解溶的操纵,以增强界面离子导电.
- 在SSB全细胞中制造和测试可扩展的CSE,使用高质量载荷阴极和石墨阳极.
主要成果:
- 在CSE中LPSCl的透值受到GPE弹性的显著影响.
- 调整Li+-glyme复合物的溶解行为有效地促进了LPSCl-GPE接口的离子导电.
- 成功制造了一个可扩展的CSE (8x6厘米,厚度约40微米).
- 制造的SSB全电池实现了480Wh的高体积能量密度Lcell-1并且在25°C下表现出稳定的循环.
结论:
- 已经建立了对CSE中离子运输的机制理解,特别是在无机聚合物接口.
- 与之前报告的基于CSE的SSB相比,开发的CSE表现出更高的性能.
- 这项研究为开发下一代高能量密度固态电池铺平了道路.
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