Gm Global Technolgoy Operations, Inc.

Misle M Tessema

Michael P Balogh

Mahmoud H Abd Elhamid

Gayatri Vyas Dadheech

Daniel P Miller

Ratandeep S Kukreja

Daad B Haddad

Nicholas P Irish

A method of determining a thickness of a submicron carbon of a carbon-coated metal base plate that includes conducting Raman spectroscopy at a target location of the carbon-coated metal base plate to obtain a Raman shift spectrum for the target location. The Raman shift spectrum obtained at the target location is then converted into a calculated thickness of the submicron carbon coating at the target location. The conversion of the Raman shift spectrum into the calculated thickness of the submicron carbon coating at the target location may involve referencing a linear correlation that has been established over the defined wavenumber range between (1) an integrated intensity of a Raman carbon signal obtained from each of a series of reference plates that includes a submicron carbon coating having a verified thickness and (2) the verified thicknesses of the submicron carbon coatings of the series of reference plates.

Determining the thickness of a submicron carbon coating on a carbon-coated metal base plate using Raman spectroscopy

A method for determining an amount of lithium in a lithium-ion battery electrode sample includes a step of determining powder X-ray diffraction peaks of the lithium-ion battery electrode sample. The powder X-ray diffraction peaks of the lithium-ion battery electrode sample are compared with a set of lithium-containing samples having pre-determined lithium concentrations to determine the amount of lithium in the lithium-ion battery electrode sample.

Method for determining the lithiation of Li-ion battery electrodes

A method of depositing a thin gold coating on bipolar plate substrates for use in fuel cells includes depositing a gold coating onto at least one surface of the bipolar plate substrate followed by annealing the gold coating at a temperature between about 200&#xb0; C. to 500&#xb0; C. The annealed gold coating has a reduced porosity in comparison with a coating which has not been annealed, and provides improved corrosion resistance to the underlying metal comprising the bipolar plate.

Method of depositing durable thin gold coating on fuel cell bipolar plates

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Warren, MI, United States of America

Misle M Tessema