Highly durable piezo-electric energy harvester by a super toughened and flexible nanocomposite: effect of laponite nano-clay in poly(vinylidene fluoride)

作者：Rahman Wahida; Ghosh Sujoy Kumar; Middya Tapas Ranjan; Mandal Dipankar^*

来源：Materials Research Express, 2017, 4(9): 095305.

DOI：10.1088/2053-1591/aa8583

• PVDF
• laponite nano-clay
• self-poled
• energy density
• self-powered electronics
• piezoelectric nanogenerator

A highly durable piezoelectric energy harvester is introduced by integrating the toughness and flexibility of a non-electrically poled, laponite nano-clay mineral-induced.-phase (up to 98%) in a poly(vinylidene-fluoride) (PVDF) matrix by a simple solvent evaporation technique. Owing to a superior electromechanical coupling effect, PVDF/laponite nanocomposites retain excellent biomechanical energy harvesting capabilities under external vibration (as high as 6 V output voltage and 70 nA output current under a compressive force of 300 N) and charge storage properties under an external high electric field (maximum 0.8 J cm(-3) of discharged energy density at a breakdown strength of 302 MV m(-1)). As a proof of concept, the fabricated nanogenerator (NG) possesses a high output power density (similar to 6.3 mW m(-2)) that directly drives several consumer electronics without using any storage system or batteries. It paves the way for potential applicability in next generation electronics, particularly as a self-powered device and to configure sustainable internet of things (IoT) sensor networks.

• 出版日期2017-9