Compatibility and Interaction Mechanism between EPDM Rubber and a SF Alternative Gas-CFN/CO/O.

Among the numerous novel eco-friendly insulating gases, CFN has attracted much attention due to its excellent electrical performance. However, except for the electrical perfomance, the compatibility between the gas medium and the sealing materials is equally important for gas-insulated equipment. At present, studies about the compatibility between CFN and EPDM, a widely used sealing material in power systems, are available in some previous works, but few focused on the compatibility comparison between CFN gas mixtures and EPDM with different third monomers.

A Low-Cost and High-Performance Sulfonated Polyimide Proton-Conductive Membrane for Vanadium Redox Flow/Static Batteries.

A novel side-chain-type fluorinated sulfonated polyimide (s-FSPI) membrane is synthesized for vanadium redox batteries (VRBs) by high-temperature polycondensation and grafting reactions. The s-FSPI membrane has a vanadium ion permeability that is over an order of magnitude lower and has a proton selectivity that is 6.8 times higher compared to those of the Nafion 115 membrane.