When cell components of lithium-ion secondary batteries are affected by water vapor and oxygen in the atmosphere, the battery characteristics are significantly affected. It is therefore desirable to handle and characterize the cell components under an atmosphere not affected by water vapor or oxygen. The IRSpirit, a compact FTIR, can be installed in a glove box, thus enabling the evaluation of cell components in a high purity argon atmosphere with low dew point and low oxygen concentration. This article introduces an example of the measurement of organic electrolyte solutions, commonly used in lithium-ion secondary batteries.
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