Infrared photothermal deflection spectroscopy: A new probe for the investigation of electrochemical interfaces

Date Published
05/1996
Publication Type
Journal Article
Authors
DOI
10.1149/1.1836672
Abstract

An infrared photothermal deflection spectroscopy system has been developed using infrared tunable diode lasers in the wavelength region from 8 to 16 μm. This system allows the collection of in situ optical absorption spectra of species at electrode/electrolyte interfaces in an electrochemical cell. The infrared spectra of LiOH and Li2CO3 formed on the surface of a lithium foil were recorded. The infrared photothermal deflection spectroscopy technique has been used to monitor the lithium electrode surface in an operating cell, Li/P(EO)8LiN(CF3SO2)2/Ni. The in situ spectra (in the 800-1000cm-1 region) show that the film formation at Li/polymer electrolyte interfaces is dominated by LiOH, although there also appears to be organic species in the surface film.

Journal
Journal of the Electrochemical Society
Volume
143
Year of Publication
1996
Issue
5
Number
5
Pagination
1514-1521
Keywords
Organizations
Download citation