In this work, we successfully suppressed the Li dendrite growth on the Li anode by designing novel electrolyte systems. We observed an uniform solid electrolyte interface (SEI) layer was coated on the surface of Li metal anode through the scanning electron microscopy, this SEI layer helps to prevent the Li dendrite formation. Fig.1 compares the morphologies of deposited Li using different electrolytes. We also manipulated the composition of SEI by using different combinations of electrolyte solvents and Li salts. The chemical composition and structural information of the SEIs are investigated by X-ray Photoelectron Spectroscopy, X-ray diffraction, and Infrared Spectroscopy. Furthermore, this work demonstrates a new strategy of manipulating beneficial SEI formation, which shed light on the application of Li metal anode in high energy density batteries.
Reference
1. W. Xu, J. L. Wang, F. Ding, X. L. Chen, E. Nasybutin, Y. H. Zhang and J. G. Zhang, Energy & Environmental Science, 2014, 7, 513-537.