Coupled Supercapacitor and Triboelectric Nanogenerator Boost Biomimetic Pressure Sensor

Abstract

With the fast development of supercapacitor and triboelectric nanogenerator (TENG), it is now possible to fabricate biomimetic pressure sensors with high flexibility and sustainability. Herein, an ultrathin supercapacitor is fabricated with the paper sheet and the solid electrolyte for storing energy generated by TENG. With a sandwich design, the triboelectrodes sandwiched within the two solid supercapacitors can not only store electrical energy by a wireless energy transfer mode but also help TENG imitate the receptor's unique characteristics by simultaneously measuring both static and dynamic pressures in a self‐driven mode. In addition, the voltage of the supercapacitor increases linearly with the vibration times, which hints that this integrated device also endows functions such as vibration counting and frequency computing. This work contributes to new strategies for making multifunctional biomimetic electronics that promote the development of artificial intelligence.

Boosting the cycling stability of transition metal compounds-based supercapacitors

“…For instance, Owusu1 et al [53] reported SCs based on iron oxide hydroxide with a mass loading as high as 9.1 mg cm -2 , which is close to the 10 mg cm -2 loading required in commercial devices. Even for the SCs with low mass loading of transition metal based materials but high cycling stability, they could still be potentially useful in areas such as micro-SCs, transparent devices [258], micro-sensors [259] and electrochromic SCs [224], which require high energy density delivered by low mass loading. Among all the transition metal based materials, composite materials are some of the most promising electrode materials for SCs owing to the complimentary properties of transition metal based compounds and carbon based materials.…”

Recent Progress in Micro‐Supercapacitor Design, Integration, and Functionalization

“…Those multifunctional MSCs exhibited fast response to the external stimuli. In the latest research, some novel functional materials have been employed to fabricate MSCs toward a direction of intelligence …”

A Monocharged Electret Nanogenerator‐Based Self‐Powered Device for Pressure and Tactile Sensor Applications

“…Micromechanical electromechanical systems (MEMS) based pressure sensors usually show a relatively high sensitivity, but the complexity of fabrication process limits its wide applications . Recently, triboelectric nanogenerator based pressure sensors was reported exhibiting high sensitivity with relatively simple structure . However, the frequent contact between the metal electrode and the polymer film of the device may reduce the lifetime of triboelectric devices.…”