| 초록 |
With the development of wearable electronic devices, there is a demand for stretchability of power supplies for continuously and stably supplying energy to wearable electronic devices. We realized an all-stretchable component for lithium ion battery with superior mechanical property and high performance using reentrant micro-honeycomb graphene-CNT/active materials frameworks and gel polymer electrolyte. Our directional-freezing self-assembly and radial compression fabrication method created the reentrant micro-honeycomb and directionally porous structure. The physically cross-linked polymeric gel electrolyte can be act as a stretchable separator and a mechanical reinforcement of stretchable electrodes while having high ion conductive property. The resistance and cell capacity changes of both electrodes for unidirectional strain of 0-50% were stable to less than 20% for 500 cycles even under repetitive tensioning. |
