Measuring Electronic Accessibility Of Electrode Regions And Particles

Abstract

Provided is a method, the method including visualizing, with electrochemical fluorescent microscopy, electronic connections between particles of active material and conductive additive in a composite battery electrode. Also provided is a testing apparatus, the apparatus including a transparent conductor; a composite battery electrode, the transparent conductor and composite battery electrode being in electronic communication with one another; a separator disposed between the transparent conductor and the composite battery electrode; a medium, the medium comprising an electrofluorophore, and the medium contacting the composite battery electrode. Also provided is a method, comprising: collecting a fluorescence image representative of a composite material that (i) comprises a plurality of particles and (ii) comprises an electrofluorophore; and estimating particles of the composite electrode that are in electronic isolation.

Dependencies are inferred from the claim text.