Solid-state batteries that utilize sulfide-based solid-electrolytes, such as the argyrodite LiPSCl, have become one of the most promising directions for next-generation energy storage. However, one remaining technical challenge for such materials has been the requirement of large pressures during operation. This challenge grows as the size of the cells increase as the pressure must be uniformly distributed over a larger-and-larger area. In this work, we introduce an isotropic cell design to pressurize the cell with perfect homogeneity, which is ensured by using a fluid pressurization medium. By achieving perfect homogeneity, the magnitude of the pressure necessary to stabilize the material is greatly reduced. Using such an isotropic cell design, lithium-metal solid-state pouch cells achieve remarkable extreme-fast-charging performance even at a low-pressure of only 2 MPa.

中文翻译：

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各向同性电池设计可实现低压锂金属固态电池


利用硫银矿LiPSCl等硫化物固体电解质的固态电池已成为下一代储能最有前途的方向之一。然而，此类材料的一项剩余技术挑战是在操作过程中需要大压力。随着细胞尺寸的增加，压力必须均匀分布在越来越大的区域上，这一挑战也随之增加。在这项工作中，我们引入了各向同性的单元设计，以完美的均匀性对单元进行加压，这是通过使用流体加压介质来确保的。通过实现完美的均匀性，稳定材料所需的压力大小大大降低。利用这种各向同性的电池设计，锂金属固态软包电池即使在仅 2 MPa 的低压下也能实现卓越的极快充电性能。