Working principle and experimental validation of the Membrane-separated DEMS (MDEMS). (IMAGE)
Caption
Schematic of the MDEMS setup featuring a graphene oxide-based gas separation membrane (Left). The membrane selectively blocks volatile organic solvent molecules (e.g., DEC, EMC) from entering the mass spectrometer (MS), while allowing dissolved gases (e.g., H2, O2, CO, CO2, C2H4) generated in the NCM811-graphite full cell to be carried by an argon flow to the mass analyzer for detection. Corresponding gas evolution data (H2 and CO2) during cycling at 45℃ (Right). The results show that the combination of a carbon-coated NCM811 cathode and LiDFOB additive significantly suppresses gas generation compared to the unmodified cell, validating the strategy's effectiveness for enhancing battery stability.
Credit
©Science China Press
Usage Restrictions
Use with credit.
License
Original content