The benefits of combining 1D and 3D nanofillers in a piezocomposite nanogenerator for biomechanical energy harvesting

Zouhair Hanani (1, 2, 3) , Ilyasse Izanzar (1) , Soukaina Merselmiz (1) , M'Barek Amjoud (1) , Daoud Mezzane (1, 4) , Jaafar Ghanbaja (5) , Ismael Saadoune (6, 1) , Mohammed Lahcini (6, 1) , Matjaz Spreitzer (3) , Damjan Vengust (3) , Mimoun El Marssi (4) , Zdravko Kutnjak (3) , Igor A. Luk'Yanchuk (4, 7) , Mohamed Gouné (2)

1 IMED-Lab - Laboratoire des Matériaux Innovants, Energie et Développement Durable [Marrakech]
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 IJS - Jozef Stefan Institute [Ljubljana]
4 LPMC - Laboratoire de Physique de la Matière Condensée - UR UPJV 2081
5 IJL - Institut Jean Lamour
6 UM6P - Université Mohammed VI Polytechnique [Ben Guerir]
7 Department of Building Materials

Mechanical energy harvesting using piezoelectric nanogenerators (PNGs) offers an attractive solution for driving low-power portable devices and self-powered electronic systems. Here, we designed an eco-friendly and flexible piezocomposite nanogenerator (c-PNG) based on H-2(Zr0.1Ti0.9)(3)O-7 nanowires (HZTO-nw) and Ba0.85Ca0.15Zr0.10Ti0.90O3 multipods (BCZT-mp) as fillers and polylactic acid (PLA) as a biodegradable polymer matrix. The effects of the applied stress amplitude, frequency and pressing duration on the electric outputs in the piezocomposite nanogenerator (c-PNG) device were investigated by simultaneous recording of the mechanical input and the electrical outputs. The fabricated c-PNG shows a maximum output voltage, current and volumetric power density of 11.5 V, 0.6 mu A and 9.2 mW cm(-3), respectively, under cyclic finger imparting. A high-pressure sensitivity of 0.86 V kPa(-1) (equivalent to 3.6 V N-1) and fast response time of 45 ms were obtained in the dynamic pressure sensing. Besides this, the c-PNG demonstrates high-stability and durability of the electrical outputs for around three months, and can drive commercial electronics (charging capacitor, glowing light-emitting diodes and powering a calculator). Multi-physics simulations indicate that the presence of BCZT-mp is crucial in enhancing the piezoelectric response of the c-PNG. Accordingly, this work reveals that combining 1D and 3D fillers in a polymer composite-based PNG could be beneficial in improving the mechanical energy harvesting performances in flexible piezoelectric nanogenerators for application in electronic skin and wearable devices.

Domaines: Matière Condensée [cond-mat]

Zouhair Hanani, Ilyasse Izanzar, Soukaina Merselmiz, M'Barek Amjoud, Daoud Mezzane, et al.. The benefits of combining 1D and 3D nanofillers in a piezocomposite nanogenerator for biomechanical energy harvesting. Nanoscale Advances, 2022, 4 (21), pp.4658-4668. ⟨10.1039/d2na00429a⟩. ⟨hal-03837956⟩