Degradation Processes of the Single-Crystal Silicon Electrodes during lithiation

摘要

The influence of crystal lattice orientation on lithiation process of p-type single-crystal silicon wasinvestigated using cyclic voltammetry, galvanostatic cycling and electronic impedance spectroscopy.The surfaces of electrodes following cycling were studied using scanning electron microscopy. Defectsformed during 100 charge-discharge cycles as a result of partial electrode destruction ranges from 50to 100 nm, accounting for the cycling stability of electrodes based on silicon nanoparticles of sizes notexceeding 150 nm.