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Physio-Electrochemically Durable Dry-Processed Solid-State Electrolyte Films for All-Solid-State Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-04-02 , DOI: 10.1002/adfm.202301341 Dong Ju Lee 1 , Jihyun Jang 1, 2 , Jung‐Pil Lee 3 , Junlin Wu 4 , Yu‐Ting Chen 4 , John Holoubek 1 , Kunpeng Yu 5 , So‐Yeon Ham 4 , Yuju Jeon 1 , Tae‐Hee Kim 1 , Jeong Beom Lee 3 , Min‐Sang Song 3 , Ying Shirley Meng 1, 4, 6, 7 , Zheng Chen 1, 4, 5, 7
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-04-02 , DOI: 10.1002/adfm.202301341 Dong Ju Lee 1 , Jihyun Jang 1, 2 , Jung‐Pil Lee 3 , Junlin Wu 4 , Yu‐Ting Chen 4 , John Holoubek 1 , Kunpeng Yu 5 , So‐Yeon Ham 4 , Yuju Jeon 1 , Tae‐Hee Kim 1 , Jeong Beom Lee 3 , Min‐Sang Song 3 , Ying Shirley Meng 1, 4, 6, 7 , Zheng Chen 1, 4, 5, 7
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The dry process is a promising fabrication method for all-solid-state batteries (ASSBs) to eliminate energy-intense drying and solvent recovery steps and to prevent degradation of solid-state electrolytes (SSEs) in the wet process. While previous studies have utilized the dry process to enable thin SSE films, systematic studies on their fabrication, physical and electrochemical properties, and electrochemical performance are unprecedented. Here, different fabrication parameters are studied to understand polytetrafluoroethylene (PTFE) binder fibrillation and its impact on the physio-electrochemical properties of SSE films, as well as the cycling stability of ASSBs resulting from such SSEs. A counter-balancing relation between the physio-electrochemical properties and cycling stability is observed, which is due to the propagating behavior of PTFE reduction (both chemically and electrochemically) through the fibrillation network, resulting in cell failure from current leakage and ion blockage. By controlling PTFE fibrillation, a bilayer configuration of SSE film to enable physio-electrochemically durable SSE film for both good cycling stability and charge storage capability of ASSBs is demonstrated.
中文翻译：
用于全固态电池的物理电化学耐久性干法固态电解质薄膜
干法工艺是一种很有前途的全固态电池（ASSB）制造方法，可以消除高能耗的干燥和溶剂回收步骤，并防止湿法工艺中固态电解质（SSE）的降解。虽然之前的研究利用干法工艺来制备 SSE 薄膜，但对其制造、物理和电化学性能以及电化学性能的系统研究是前所未有的。在这里，研究了不同的制造参数，以了解聚四氟乙烯 (PTFE) 粘合剂原纤化及其对 SSE 薄膜的物理电化学性质的影响，以及由此类 SSE 产生的 ASSB 的循环稳定性。观察到物理电化学性质和循环稳定性之间的平衡关系，这是由于 PTFE 还原（化学和电化学）通过纤颤网络的传播行为，导致电池因电流泄漏和离子堵塞而失效。通过控制 PTFE 原纤化，SSE 薄膜的双层配置使 SSE 薄膜具有物理电化学耐用性，从而实现 ASSB 的良好循环稳定性和电荷存储能力。
更新日期：2023-04-02
中文翻译：
用于全固态电池的物理电化学耐久性干法固态电解质薄膜
干法工艺是一种很有前途的全固态电池（ASSB）制造方法，可以消除高能耗的干燥和溶剂回收步骤，并防止湿法工艺中固态电解质（SSE）的降解。虽然之前的研究利用干法工艺来制备 SSE 薄膜，但对其制造、物理和电化学性能以及电化学性能的系统研究是前所未有的。在这里，研究了不同的制造参数，以了解聚四氟乙烯 (PTFE) 粘合剂原纤化及其对 SSE 薄膜的物理电化学性质的影响，以及由此类 SSE 产生的 ASSB 的循环稳定性。观察到物理电化学性质和循环稳定性之间的平衡关系，这是由于 PTFE 还原（化学和电化学）通过纤颤网络的传播行为，导致电池因电流泄漏和离子堵塞而失效。通过控制 PTFE 原纤化，SSE 薄膜的双层配置使 SSE 薄膜具有物理电化学耐用性，从而实现 ASSB 的良好循环稳定性和电荷存储能力。
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