Porous cellulose composite aerogel films with super piezoelectric properties for energy harvesting.

Authors :: Song Y
Wu T
Bao J
Xu M
Yang Q
Zhu L
Shi Z
Hu GH
Xiong C
Source :: Carbohydrate polymers [Carbohydr Polym] 2022 Jul 15; Vol. 288, pp. 119407. Date of Electronic Publication: 2022 Mar 24.
Publication Year :: 2022
Abstract: The piezoelectric effect is one of the most promising electromechanical coupling processes for mechanical energy conversion and energy harvesting. However, natural polymer based piezoelectric materials are of poor piezoelectric performance. we developed flexible porous piezoelectric aerogel films based on TEMPO-oxidized cellulose nanofibrils (TOCN) and MoS <subscript>2</subscript> nanosheets. Those aerogel films possessed large specific surface areas and abundant mesopores. Moreover, they exhibited very good piezoelectric properties when a field strength of 20 MV/m was used to polarize MoS <subscript>2</subscript> nanosheets and air in the mesopores. When assembled to piezoelectric nanogenerators (PENGs), a TOCN/MoS <subscript>2</subscript> aerogel film PENG containing 6 wt% of MoS <subscript>2</subscript> exhibited the best output performance. It generated an open circuit voltage of 42 V and a short-circuit current of 1.1 μA, a maximum area power density of 1.29 μW/cm <superscript>2</superscript> and a maximum volume power density of 0.143 μW/cm <superscript>3</superscript> . These features enable them to be promising piezoelectric materials for energy harvesting.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Subjects :: Disulfides chemistry
Molybdenum chemistry
Porosity
Cellulose
Cellulose, Oxidized

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