Thin and Flexible Solid Electrolyte Membranes with Ultrahigh Thermal Stability Derived from Solution-Processable Li Argyrodites for All-Solid-State Li-Ion Batteries,ACS Energy Letters

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Thin and Flexible Solid Electrolyte Membranes with Ultrahigh Thermal Stability Derived from Solution-Processable Li Argyrodites for All-Solid-State Li-Ion Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-02-12 , DOI: 10.1021/acsenergylett.0c00251
Dong Hyeon Kim _{1,

2} , Yong-Hyeok Lee ₂ , Yong Bae Song ₁ , Hiram Kwak ₁ , Sang-Young Lee ₂ , Yoon Seok Jung ₁

Affiliation

Sheet-type solid electrolyte (SE) membranes are essential for practical all-solid-state Li batteries (ASLBs). To date, SE membrane development has mostly been based on polymer electrolytes with or without the aid of liquid electrolytes, which offset thermal stability (or safety). In this study, a new scalable fabrication protocol for thin (40–70 μm) and flexible single-ion conducting sulfide SE membranes with high conductance (29 mS) and excellent thermal stability (up to ∼400 °C) is reported. Electrospun polyimide (PI) nonwovens provide a favorable porous structure and ultrahigh thermal stability, thus accommodating highly conductive infiltrating solution-processable Li₆PS₅Cl_0.5Br_0.5 (2.0 mS cm^–1). LiNi_0.6Co_0.2Mn_0.2O₂/graphite ASLBs using 40 μm thick Li₆PS₅Cl_0.5Br_0.5-infiltrated PI membranes show promising performances at 30 °C (146 mA h g^–1) and excellent thermal stability (marginal degradation at 180 °C). Moreover, a new proof-of-concept fabrication protocol for ASLBs at scale that involves the injection of liquefied SEs into the electrode/PI/electrode assemblies is successfully demonstrated for LiCoO₂/PI–Li₆PS₅Cl_0.5Br_0.5/Li₄Ti₅O₁₂ ASLBs.

中文翻译：

用于全固态锂离子电池的溶液可加工锂银复合物派生的具有超高热稳定性的薄而柔性的固体电解质膜

片状固体电解质（SE）膜对于实用的全固态锂电池（ASLB）至关重要。迄今为止，SE膜的开发主要基于有或没有液态电解质的聚合物电解质，这抵消了热稳定性（或安全性）。在这项研究中，报告了一种新的可扩展制造协议，该协议可用于具有高电导率（29 mS）和出色的热稳定性（高达约400°C）的薄（40-70μm）和柔性单离子导电硫化物SE膜。电纺聚酰亚胺（PI）非织造布具有良好的多孔结构和超高的热稳定性，因此可适应高导电性的渗透溶液可加工Li ₆ PS ₅ Cl _0.5 Br _0.5（2.0 mS cm ^–1）。锂镍使用厚度为40μm的Li ₆ PS ₅ Cl _0.5 Br _0.5的_0.6 Co _0.2 Mn _0.2 O ₂ /石墨ASLBs渗透的PI膜在30°C（146 mA hg ^–1）时表现出良好的性能，并具有出色的热稳定性（在180°C时有少量降解） C）。此外，针对LiCoO ₂ / PI-Li ₆ PS ₅ Cl _0.5 Br _0.5 / Li _4，成功地论证了针对ASLB的新概念验证制造方案，该方案涉及将液化SE注入电极/ PI /电极组件中。钛₅ O_12个ASLB。

更新日期：2020-02-12

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