Intellectual Property India Publishes Patent Application for Composite Film And Electro Spun Nanofiber Piezoelectric Energy Harvesting Devices With Enhanced Output And Performance Benchmarking

MUMBAI, India, July 7 -- Intellectual Property India has published a patent application (202641080353 A) filed by Btp Madhav; and Koneru Lakshmaiah Education Foundation on June 30, 2026, for Composite Film And Electro Spun Nanofiber Piezoelectric Energy Harvesting Devices With Enhanced Output And Performance Benchmarking.

Inventors include Challa Krishnaveni; Vivekananthan Venkateswaran; Dhara Sateesh; and B T P Madhav.

The application for the patent was published on July 03, 2026, under issue no. 27/2026.

Abstract: Nowadays, wearable devices are commonly used for monitoring body movements, but their reliance on frequent recharging limits their effectiveness. To ensure uninterrupted operation, a continuous, battery-free energy supply is crucial. This can be achieved by harvesting energy from body movements to create autonomous and self-powered devices. Piezoelectric nanogenerators (PENGs) convert mechanical movements into usable electrical energy. In this work, we used Potassium Sodium Niobate (K0.5Na0.5NbO3) as the basic precursors and it’s prepared by using solid state reaction (SSR) method. KNN has high piezoelectric co-efficient and it’s a lead-free piezoelectric material. The prepared KNN nanoparticles that were embedded in a polyvinylidene fluoride (PVDF) matrix with various ratios 5wt%, 10wt%, 15wt%, 20wt% and 25wt%. By using same solution, we prepared composite films (CF) and nano fiber mats. From that 15wt% of composite films and 15wt% Espin film giving high electrical output. By using hand tapping the electrical response of PVDF/KNN CF showed an open-circuit voltage (Vp-p) of 60 V and a short-circuit current (Ip-p) of 0.75µA, while PVDF/KNN electro-spun film exhibited an open-circuit voltage (Vp-p) of 80V and a short-circuit current (Ip-p) of 1.5µA. Compared to CF, the electro-spun film generated a significantly higher electrical response, demonstrating PVDF/KNN electro-spun film is great potential for self-powered wearable devices and human activity monitoring applications.

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