Increasing the reactive surface area of a Li three dimensional negative electrode by morphology control

摘要

The theoretical grounds establishing the ideal composition, temperature, and time to attain the highest interconnected interface area within a liquid miscibility gap were developed. A three dimension (3D) negative electrode (having low polarization, low density, and interconnected channels) based on the Li-LiH system is proposed for Li conversion batteries. Using the Gibbs free energy of the Li-LiH liquid phase and phase field simulations, we determined the corresponding 3D morphology finding the ideal conditions to increase the electrode's reactive surface area. The optimal morphology was obtained for the composition xH = 0.413 (in the Li-H system).