title: Piezoelectric-driven self-charging supercapacitor power cell.
abstract: In this work, we have fabricated a piezoelectric-driven self-charging supercapacitor power cell (SCSPC) using MnO2 nanowires as positive and negative electrodes and a polyvinylidene difluoride (PVDF)-ZnO film as a separator (as well as a piezoelectric), which directly converts mechanical energy into electrochemical energy. Such a SCSPC consists of a nanogenerator, a supercapacitor, and a power-management system, which can be directly used as a power source. The self-charging capability of SCSPC was demonstrated by mechanical deformation under human palm impact. The SCSPC can be charged to 110 mV (aluminum foil) in 300 s under palm impact. In addition, the green light-emitting diode glowed using serially connected SCSPC as the power source. This finding opens up the possibility of making self-powered flexible hybrid electronic devices.
authors: Ananthakumar
authors: A
authors: Ramadoss
authors: Balasubramaniam
authors: B
authors: Saravanakumar
authors: Seung Woo
authors: SW
authors: Lee
authors: Young-Soo
authors: YS
authors: Kim
authors: Sang Jae
authors: SJ
authors: Kim
authors: ⊥Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.
authors: Zhong Lin
authors: ZL
authors: Wang
keywords: energy harvesting; energy storage; piezoelectric separator; self-charging