Study on Crystal Growth Kinetics and Preferred Orientation for LiF Crystal in Dimethyl Sulfoxide/1, 3-dioxolane Based Electrolyte

The Li/CFx primary battery with the highest energy density has been applied widely in many fields. However, the Li/CFx battery has been suffering from some problems for large-scale applications, such as low energy density, which needs to overcome urgently. Among the technical solutions, the modification for discharge product layer is an effective approach to solve the problem. To adjust the pore structure of discharge product layer, it is necessary to explore both the growth and orientation kinetics of LiF crystals as the main discharge product of Li/CFx batteries. In this work, the growth kinetic of LiF crystal during discharging in dimethyl sulfoxide/1, 3-dioxolane (DMSO/1, 3-DO) based electrolytes are explored by kinetic models of crystal growth firstly. The calculating results show that the growth kinetics of LiF crystal in the DMSO/1, 3-DO (5:5, V:V) based electrolyte is the best suited to the nucleation and nuclei growth mechanism, which is different from two-dimensional diffusion mechanism of LiF c...