| 초록 |
The increasing demand for high-capacity mobile energy has been pushing the development of next-generation batteries that can replace lithium-ion batteries. Lithium-sulfur batteries (LSBs) have attracted increasing attention for their high theoretical capacity and low cost. However, the shuttle effect, diffusion of lithium polysulfides (LiPSs) through the separator, is remained as a challenging issue. To inhibit this issue, separators with interlayer have been introduced, such as size exclusion or interaction using nanomaterials. In this study, we investigated the effect of boron nitride nanotubes (BNNTs) on transmission of LiPSs through the commercialized polypropylene (PP) membrane. The systematic study reveals that the favorable interaction between BNNTs and LiPSs via Lewis acid-base reduced the shuttle effect and eventually improved cell performance and life span. Furthermore, the thin film of BNNTs on the PP membrane improved the mechanical strength, thermal and chemical stability. |
