This work will examine the gassing reactions in lithium ion batteries with NCM cathode materials operating at high voltages.  By means of on-line electrochemical mass spectrometry (OEMS), it will be shown that gas formation in the initial cycles is due to the oxidation of carbonate impurities, followed by electrolyte oxidation caused by the release of lattice oxygen rather than by transition metal catalyzed electrolyte oxidation.  A quantitative analysis of the oxygen release shows that it is consistent with the formation of a thin surface layer with a spinel- and/or rocksalt structure.<br/>

Gassing reactions of NCM cathodes operated at high voltage

253rd National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.