Stable Lithium-Carbon Composite Enabled by Dual-Salt Additives.

ABSTRACT: Lithium metal is regarded as the ultimate negative electrode material for secondary batteries due to its high energy density. However, it suffers from poor cycling stability because of its high reactivity with liquid electrolytes. Therefore, continuous efforts have been put into improving the cycling Coulombic efficiency (CE) to extend the lifespan of the lithium metal negative electrode. Herein, we report that using dual-salt additives of LiPF₆ and LiNO₃ in an ether solvent-based electrolyte can significantly improve the cycling stability and rate capability of a Li-carbon (Li-CNT) composite. As a result, an average cycling CE as high as 99.30% was obtained for the Li-CNT at a current density of 2.5 mA cm^-2 and an negative electrode to positive electrode c

SUBMITTER: Zheng L 

PROVIDER: S-EPMC8053134 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature