Article Dans Une Revue Advanced Functional Materials Année : 2019

Inkjet Printing of Latex-Based High-Energy Microcapacitors

Résumé

Microenergy storage devices are appealing and highly demanded for diverse miniaturized electronic devices, ranging from microelectromechanical system, robotics, to sensing microsystems and wearable electronics. However, making high-energy microcapacitors with currently available printing technologies remains challenging. Herein, the possibility to use latex polyvinylidene fluoride (PVDF) as aqueous ink for making dielectric capacitors at the microscale is shown. The dielectric properties of printed microcapacitors can be optimized based on a novel approach, i.e., mixing PVDF latex with polyvinyl alcohol (PVA) to realize dielectric organic nanocomposites. The PVA prevents the coalescence of PVDF nanoparticles and serves as a continuous matrix phase with high dielectric breakdown strength. While the well-dispersed PVDF nanoparticles serve as highly polarizable and isolated domains, providing large electric displacement under high fields. Consequently, a high discharged energy density of 12 J cm−3 is achieved at 550 MV m−1. These printed microcapacitor demonstrate mechanical robustness and dielectric stability over time.
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Dates et versions

hal-02398753 , version 1 (12-06-2024)

Identifiants

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Fernando Torres-Canas, Jinkai Yuan, Isabelle Ly, Wilfrid A Neri, Annie Colin, et al.. Inkjet Printing of Latex-Based High-Energy Microcapacitors. Advanced Functional Materials, 2019, ⟨10.1002/adfm.201901884⟩. ⟨hal-02398753⟩

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