Using an electrolyte additive that can suppress Li dendrite formation and improve the performance of Li metal batteries, we have achieved for the first time the growth of dendrite-free lithium films with self-aligned and highly-compacted nanorod structure.
Significance and Impact
The findings could help scientists design a safe and stable metallic Li anode: the Holy Grail of Li-based battery research. Ultimately, the study could pave the way for the practical application of several high energy density battery systems, including Li-S, Li-air, and other Li metal batteries for powering electric vehicles and storing renewable energy on the grid.
- CsPF6 additive can promote the formation of a LiF-rich solid electrolyte interphase (SEI) layer on the surface of the substrate prior to Li deposition.
- The preformed SEI layer led to the formation of dendrite-free lithium films with self-aligned and highly-compacted nanorod structure
Work performed at Pacific Northwest National Laboratory (JCESR partner) Yaohui Zhang, Jiangfeng Qian, Wu Xu*, Selena M. Russell, Xilin Chen, Eduard Nasybulin, Priyanka Bhattacharya, Mark H. Engelhard, Donghai Mei, Ruiguo Cao, Fei Ding, Arthur V. Cresce, Kang Xu, Ji-Guang Zhang*, Nano Lett. 2014, 14, 6889−6896.