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High-performance and multifunctional conductive aerogel films for outstanding electromagnetic interference shielding, Joule heating and energy harvesting.
- Source :
-
Chemical Engineering Journal . Sep2023, Vol. 471, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] • Extremely high maximum instantaneous power density of 694 mW/m2. • Ideal electromagnetic interference shielding efficiency of 34.54 dB. • Long-term thermal stability with fast response for warming or cooling processes. High-performance polymer-based functional materials have attracted tremendous interests in various applications. However, it is a challenge to integrate multiple functions without losing the advantages of being light, porous, green and so on. Herein, we designed a conductive aramid nanofiber (ANF)/cellulose nanofibril (CNF)/silver nanowire (AgNW) (ACA) composite aerogel film by directional freeze-drying and moderate compressing. The ACA aerogel film obtained an ideal electromagnetic interference shielding efficiency of 34.34 dB while maintaining a high electrical conductivity of 10.81 S/m. On the other hand, the surface steady-state temperature of the aerogel film reached 111 °C under a low applied voltage of 1.6 V. More importantly, a single-electrode triboelectric nanogenerator (TENG) was assembled by ACA aerogel film and polytetrafluoroethylene (PTFE) film. The open-circuit voltages, short-circuit currents, and maximum instantaneous power density of the TENG exhibited a spectacular value of 104 V, 1.52 μA, and 694 mW/m2, respectively, which could light up 23 LED lights at the same time. This novel multifunctional ACA aerogel film holds great application potentials for electromagnetic protection, energy harvesting, and thermal management. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 471
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 169789859
- Full Text :
- https://doi.org/10.1016/j.cej.2023.144548