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- W4212854953 abstract "Abstract A vast amount of energy can be extracted from the untapped low‐grade heat from sources below 100 °C and the Gibbs free energy from salinity gradients. Therefore, a process for simultaneous and direct conversion of these energies into electricity using permselective membranes was developed in this study. These membranes screen charges of ion flux driven by the combined salinity and temperature gradients to achieve thermo‐osmotic energy conversion. Increasing the charge density in the pore channels enhanced the permselectivity and ion conductance, leading to a larger osmotic voltage and current. A 14‐fold increase in power density was achieved by adjusting the ionic site population of covalent organic framework (COF) membranes. The optimal COF membrane was operated under simulated estuary conditions at a temperature difference of 60 K, which yielded a power density of ≈231 W m −2 , placing it among the best performing upscaled membranes. The developed system can pave the way to the utilization of the enormous supply of untapped osmotic power and low‐grade heat energy, indicating the tremendous potential of using COF membranes for energy conversion applications." @default.
- W4212854953 created "2022-02-24" @default.
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- W4212854953 date "2022-02-28" @default.
- W4212854953 modified "2023-10-14" @default.
- W4212854953 title "Thermo‐Osmotic Energy Conversion Enabled by Covalent‐Organic‐Framework Membranes with Record Output Power Density" @default.
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- W4212854953 doi "https://doi.org/10.1002/ange.202116910" @default.
- W4212854953 hasPublicationYear "2022" @default.
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