A Safe and Sustainable Bacterial Cellulose Nano-Fiber Separator for Lithium Rechargeable Batteries
Journal
P NATL ACAD SCI USA (PNAS)
Date
2019.09.24
Abstract
Bacterial cellulose nanofiber (BCNF) with high thermal stability produced by eco-friendly process has emerged as a promising solution to realize safe and sustainable materials in large-scale battery. However, an understanding of the actual thermal behaviour of the BCNF in full-cell battery has been lacking, and the yield is still limited for commercialization. Here we report the entire process of BCNF production and battery manufacture. We systematically constructed strain with the highest yield (31.5％) by increasing metabolic flux, and improved safety by introducing a Lewis base to overcome thermochemical degradation in the battery. This report will open new ways of exploiting the BCNF as a “single-layer” separator, good alternative to existing chemical-derived one, and thus can greatly contribute to solving the environmental and safety issues.
Reference
Proc. Natl. Acad. Sci. USA, 116 (39), 19288-19293 (2019)