Abstract

The investigation technique differential electrochemical mass spectrometry (DEMS) combines cyclic voltammetry with mass spectrometry. DEMS measurements enables to detect on-line gaseous products formed by electrochemical reactions. A new, simplified experimental set-up is presented, which allows to expand this method to high concentrated electrolyte solutions. For inorganic electrolyte, elaborated for a rechargeable Li/LiCoO 2 battery system, the usually DEMS cell is improved as compact thin-layer flow cell. Chlorine evolution — substantial for overcharge protection in this battery system — is examined at Ni and Au electrodes.

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