@article{27645, keywords = {Electrolytes, Lithium, Electrochemical electrodes, Photothermal spectroscopy, Foils, Infrared spectroscopy, Interface phenomena, Probes}, author = {Zhongyi Deng and Jonathan D Spear and James D Rudnicki and Frank R McLarnon and Elton J Cairns}, title = {Infrared photothermal deflection spectroscopy: A new probe for the investigation of electrochemical interfaces}, 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.

}, year = {1996}, journal = {Journal of the Electrochemical Society}, volume = {143}, number = {5}, pages = {1514-1521}, month = {05/1996}, doi = {10.1149/1.1836672}, language = {eng}, }