Layered double hydroxides (LDHs) have been extensively investigated for various applications such as drug delivery, energy storage, catalysis, and luminescence. In this study, an eco-friendly ZnAl–CO3–LDH-poly(vinylidene fluoride) (ZnAl–LDH–PVDF) composite acting...

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This paper presents a highly cost-effective design for an aluminum (Al) foil-based ZnO/Ag/ZnO-stacked piezoelectric nanogenerator (ZAZ-NG) fabricated using radio frequency magnetron sputtering. Both Al foil sheets and a silver (Ag) paste layer are utilized to make a ZAZ-NG composed of an Ag paste layer sandwiched between two zinc oxide (ZnO) layers. The output voltages of the ZAZ-NGs with various ZnO thicknesses are measured for three different bending strains. As a result, the devices could generate a relatively high peak-to-peak output voltage (Vpp) of up to 2.5 V, which is 28 times higher than that of the single ZnO layered device. In addition, the device performance shows a strong dependence on the thickness of the ZnO layer. Moreover, the ZAG-NG device is structurally stable and can be fabricated using cost-effective methods.