Abstract
A novel double-layer composite membrane with a MoS2-rich layer and a polymer-rich layer is prepared by the method of one-step slow solvent evaporation for vanadium redox flow batteries. The composite membrane is composed of MoS2 nanosheets as protecting layer, providing the membrane with lower VO2+ permeability and excellent chemical stability, and sulfonated modified PBI as substrate, providing high proton conductivity. The introduction of MoS2 nanosheets greatly reduces the area resistance of the PBI-PS/MoS2 membrane (0.42 Ω cm2), which is comparable to that of Nafion 212 (0.41 Ω cm2). The cell equipped with PBI-PS/MoS2 membrane presents improved coulombic efficiencies and energy efficiencies. At 200 mA cm−2, a high EE of about 80% is achieved. The cell maintains stable performances for nearly 800 cycles, showing impressive durability. The cell also shows a self-discharge rate of as low as 0.0021 V h−1. The MoS2 nanosheets layer based composite membrane is promising for VRBs.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
