Crystal Orientation Dependence of Precipitate Structure of Electrodeposited Li Metal on Cu Current Collectors

• DOI: 10.1021/acs.cgd.6b01710
• Publication Date: 2017-04-17T15:16:37Z
• Authors: Kohei Ishikawa; Yasumasa Ito; Shunta Harada; Miho Tagawa; Toru Ujihara
• Keywords: 02 engineering and technology; 0210 nano-technology

Dendritic growth at the Li anode during charging is caused by a morphological inhomogeneity of Li electrodeposition. In this study, we investigate the dependence of the morphology of Li electrodeposited on a polycrystalline Cu current collector on the Cu grain orientation both experimentally and by numerical analysis. The experimental results show that the Li precipitates that form on Cu grains that have close to (111) orientations are the smallest and the most uniform in size. Such a morphology is expected to be effective for the suppression of dendrite growth. Numerical analysis indicates that the initial stage of electrodeposition plays an important role in determining morphological variation, and this is due to the crystal orientation dependence of the adatom concentration at equilibrium.