Humidity-tolerant Moisture-driven Energy Generator with MXene Aerogel-Organohydrogel Bilayer
발표자
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초록
내용
The moisture-driven energy generators (MEGs) that harness the preferential interaction of ionized moisture with hydrophilic materials are interesting owing to their wearability and portability without needing a water container. Herein, we present a high-performance MEG with sustainable power-production capability in wide range of environment. The bilayer-based device comprises a negatively surface-charged, hydrophilic MXene (Ti3C2Tx) aerogel and polyacrylamide (PAM) ionic hydrogel. The preferential selection on MXene aerogel of positive charges supplied from the salts, and water in the hydrogel is predicted by the first principle simulation, resulting in high electric output in a wide relative humidity range: from 20% to 95%. Furthermore, by replacing the hydrogel with an organohydrogel of PAM that has excellent water retention and structural stability, a device with long-term electricity generation is realized for more than 15 days in a broad temperature range (from –20 to 80 °C).