Studies of the Stability of Poly-(Ethylene Oxide) and PEO-Based SolidElectrolytes Using Thermogravimetry-Mass Spectrometry

摘要

The thermal and oxidative stabilities of high molecular weight PEO and of solidelectrolytes formed by dissolving divalent cation salts in PEO were studied in air and nitrogen using thermogravimetry-mass spectrometry. Certain cations had large effects on the stability of PEO, while the effect of different halide anions was less pronounced. Some electrolytes were found to degrade during the electrolyte formation process. At slower heating rates, the stabilities of PEO and PbBr2PE08 were seen to be strongly influenced by traces of oxygen. The relationships between cation mobility and stability are discussed. thermal stabilities, oxidative stabilities, molecular weight, PEO, solid electrolytes, cation mobility, halide anions, thermogravimetry-mass spectrometry.