ChemInform Abstract: Study of the Li/Li3N Electrode in an Organic Electrolyte.

Abstract

ChemInform Abstract Exposure of Li to pure N2 atmosphere at ambient temp. leads to the formation of a porous Li3N film due to a decrease in the molar volume during reaction. The impedance behavior of the Li/Li3N electrode can be interpreted by a porous-film model deduced from a transmission-line model. Changes in the impedance behavior of the nitride covered electrode with immersion time, anodic, and cathodic polarizations have been attributed to the slow filling of the micropores in the Li3N film and reaction of Li with the electrolyte at the pore bases. Because the contact of the unprotected metal with the electrolyte (LiClO4-propylene carbonate) results in decomposition reactions during cycling, Li3N, formed by reaction of Li and N2 is not suitable as a solid-electrolyte interphase.