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- W4225005366 abstract "Development of ionic thermoelectric (iTE) materials is of immense interest for efficient heat-to-electricity conversion due to their giant ionic Seebeck coefficient (Si ), but challenges remain in terms of relatively small Si at low humidity, poor stretchability, and ambiguous interaction mechanism in ionogels. Herein, a novel ionogel is reported consisting of polyethylene oxide (PEO), polyethylene oxide-polypropylene oxide-polyethylene oxide (P123), and 1-ethyl-3-methylimidazolium acetate (Emim:OAC). By delicately designing the interactions between ions and polymers, the migration of anions is restricted due to their strong binding with the hydroxyl groups of polymers, while the transport of cations is facilitated through segmental motions due to the increased amorphous regions, thereby leading to enlarged diffusion difference between the cations and anions. Moreover, the plasticizing effect of P123 and Emim:OAC can increase the elongation at break. As a consequence, the ionogel exhibits excellent properties including high Si (18 mV K-1 at relative humidity of 60%), good ionic conductivity (1.1 mS cm-1 ), superior stretchability (787%), and high stability (over 80% retention after 600 h). These findings show a promising strategy to obtain multifunctional iTE materials by engineering the intermolecular interactions and demonstrate the great potential of ionogels for harvesting low-grade heat in human-comfortable humidity environments." @default.
- W4225005366 created "2022-04-29" @default.
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- W4225005366 date "2022-04-28" @default.
- W4225005366 modified "2023-10-12" @default.
- W4225005366 title "Tailoring Intermolecular Interactions Towards High‐Performance Thermoelectric Ionogels at Low Humidity" @default.
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- W4225005366 doi "https://doi.org/10.1002/advs.202201075" @default.
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