High-Toughness Inorganic Solid Electrolytes via the Use of Reduced Graphene Oxide
High-Toughness Inorganic Solid Electrolytes via the Use of Reduced Graphene Oxide
复制标题
利用还原氧化石墨烯制备高韧性无机固体电解质
DOI：
10.1016/j.matt.2020.05.003
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发表时间：
2020-07-01
期刊：
影响因子：
18.9
通讯作者：
Sheldon, Brian W.
中科院分区：
文献类型：
--
作者：
Athanasiou, Christos E.;Jin, Mok Yun;Sheldon, Brian W.
陶瓷固体电解质是重要的新兴材料，具有使锂金属阳极安全使用的潜力。然而，它们具有固有的低断裂韧性，这显著限制了电池的性能和可靠性。虽然通常需要较小的电解质尺寸来实现更快的离子传输，但这些长度尺度也限制了可用于设计更高抗断裂性的方法。受还原氧化石墨烯为聚合物和工程陶瓷提供的增韧的启发，本研究探索了使用rGO来增强氧化物基锂离子导体的韧性。证明了平均K-IC增强大于2倍的材料。据我们所知，这是迄今报道的最坚固的陶瓷固体电解质。基于这些结果，开发了一个分析框架，为使用2D材料设计超韧固体电解质提供指导。
Ceramic solid electrolytes are important emerging materials with the potential to enable the safe use of Li-metal anodes. However, they suffer from inherently low fracture toughness, which significantly limits battery performance and reliability. While small electrolyte dimensions are generally needed for faster ion transport, these length scales also restrict the approaches that can be used to engineer higher fracture resistance. Inspired by the toughening that reduced graphene oxide provides to polymers and engineering ceramics, this study explores the use of rGO to enhance the toughness of an oxide-based lithium-ion conductor. Materials with a greater than 2-fold enhancement in the average K-IC are demonstrated. To our knowledge, this is the toughest ceramic solid electrolyte yet reported. Based on these results, an analytical framework is developed to provide guidelines for the design of ultra-tough solid electrolytes using 2D materials.