Synergism of Al-containing solid electrolyte interphase layer and Al-based colloidal particles for stable lithium anode. (June 2017)

• Record Type: Journal Article
• Authors: Ye, Huan; Yin, Ya-Xia; Zhang, Shuai-Feng; Shi, Yang; Liu, Lin; Zeng, Xian-Xiang; Wen, Rui; Guo, Yu-Guo; Wan, Li-Jun
• Is Part Of: Nano energy. Volume 36(2017:Jun.)
• Page Start: 411
• Page End: 417
• Publication Date: 2017-06
• Subjects: Battery -- Metallic Li -- Li deposition -- AlCl3 additive -- Colloidal particles; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2017.04.056
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Trace water in nonaqueous electrolytes has been supposed to be detrimental to Li metal, which may induce formation of HF and corrode battery materials. Herein, we propose that a controllable AlCl3 is an efficient electrolyte additive for dendrite-free Li deposition. The additive could react with trace water in the electrolyte to form a stable Al2 O3 -rich solid electrolyte interphase (SEI) layer on the surface of Li and Al-based positively charged colloidal particles (PCCPs) in the electrolyte. PCCPs could form a positively charged electrostatic shield around the protruding lithium during the deposition process and induce the subsequent deposition of Li to the adjacent regions of the protruding Li, enabling a uniform and dendrite-free Li morphology. The assembled Li|Se and Li|Li4 Ti5 O12 batteries benefit from the synergism of SEI layer and PCCPs, thereby demonstrating the impressive capability for dendrite suppression of Li anode and improved electrochemical performance. Graphical abstract: Highlights: Dendrite-free Li morphology can be achieved with controllable AlCl3 as efficient electrolyte additive. AlCl3 reacts with trace water to form a stable Al2 O3 -rich SEI layer and Al-based colloidal particles. Synergism of SEI and colloidal particles enables well suppression of Li dendrites and improved electrochemical performances.