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Flexible Garnet Solid-State Electrolyte Membranes Enabled by Tile-and-Grout Design
ACS Energy Letters ( IF 19.3 ) Pub Date : 2019-10-15 , DOI: 10.1021/acsenergylett.9b01847
Hua Xie 1 , Yinhua Bao 2 , Jian Cheng 2 , Chengwei Wang 1 , Emily M. Hitz 1 , Chunpeng Yang 1 , Zhiqiang Liang 1 , Yubing Zhou 1 , Shuaiming He 1 , Teng Li 2 , Liangbing Hu 1
Affiliation  

Inorganic solid-state electrolytes for lithium metal batteries have attracted significant interest, but their brittle nature creates a severe hurdle to widespread application in flexible electronics. Herein, we propose the rational design of a flexible electrolyte membrane with a tile-and-grout pattern in which garnet-type electrolyte tile-like chips are joined together without gaps by styrene–butadiene copolymer using additive manufacturing. The dimensions of the garnet chips are optimized through fracture mechanics analysis, which effectively suppresses the strain energy below the fracture toughness of the garnet solid-state electrolyte, eliminating random cracking. The garnet chips function as fast lithium-ion transport channels, while the styrene–butadiene copolymer grid serves as a deformable buffer to further reduce the stress transferred to the garnet chips. The tile-and-grout design electrolyte membrane presents good flexibility and can be readily bent without breaking. Our facile and pragmatic strategy presents a new design principle for solid-state electrolytes to address the brittleness issues.

中文翻译:

平铺和灌浆设计实现了灵活的石榴石固态电解质膜

用于锂金属电池的无机固态电解质引起了人们的极大兴趣,但是其易碎性为柔性电子产品的广泛应用带来了严重的障碍。在此,我们提出了一种合理的设计,即一种带有瓷砖和灌浆图案的柔性电解质膜,其中石榴石型电解质瓷砖状芯片通过增材制造通过苯乙烯-丁二烯共聚物无间隙地连接在一起。石榴石碎片的尺寸通过断裂力学分析进行了优化,从而有效地将应变能抑制在石榴石固态电解质的断裂韧性以下,从而消除了随机裂纹。石榴石芯片可作为快速的锂离子传输通道,而苯乙烯-丁二烯共聚物网格则充当可变形的缓冲层,以进一步降低传递至石榴石碎片的应力。瓷砖和水泥浆设计的电解质膜具有良好的柔韧性,可以很容易地弯曲而不会破裂。我们灵活实用的策略为固态电解质提出了一种新的设计原则,以解决脆性问题。
更新日期:2019-10-16
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