Hierarchically Interpenetrated and Reentrant Micro-Cellular Frameworks for Stretchable Lithium Metal Batteries
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초록
내용
Demands for stretchable technology that can be used in wearable devices to increase space utilization and convenience are on the rise. To meet these demands, the energy storage system, one of the important elements of a wearable device, also needs to be stretchable. Moreover, high energy density is required for high performance and density integration of the devices. In this study, we designed a hierarchical reentrant 3D cellular structure as a stretchable framework of lithium metal composite electrodes. By using a combination of directional freezing and radial compression, we created a reentrant structure composed of GO/CNT with high conductivity and melamine foam with a 3D structure that maintains high mechanical stability even when stretched. This not only provides stretchability, but also allows for paths for lithium ions and a large surface area to reduce local current density, making it a potential candidate for high energy density stretchable lithium metal batteries.