Recent progress on flexible nanogenerators toward self‐powered systems

Abstract

The advances in wearable/flexible electronics have triggered tremendous demands for flexible power sources, where flexible nanogenerators, capable of converting mechanical energy into electricity, demonstrate its great potential. Here, recent progress on flexible nanogenerators for mechanical energy harvesting toward self‐powered systems, including flexible piezoelectric and triboelectric nanogenerator, is reviewed. The emphasis is mainly on the basic working principle, the newly developed materials and structural design as well as associated typical applications for energy harvesting, sensing, and self‐powered systems. In addition, the progress of flexible hybrid nanogenerator in terms of its applications is also highlighted. Finally, the challenges and future perspectives toward flexible self‐powered systems are reviewed.

Inversely Tuning the CO2Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

“…The rapid consumption of traditional energy has been continuously rising the CO 2 concentrations in the atmosphere, which leads to a series of climate change and threatening the Earths ecosystems. [1] Therefore, great efforts have been devoted to reducing the CO 2 emission. [2] Among different tactics, CO 2 electroreduction reaction (CO 2 RR), that driven by sustainable resource-powered electricity, has been regarded as a promising route for the future CO 2 utilization.…”

Recent Progress in Flexible Pressure Sensors Based Electronic Skin

“…[1][2][3][4] Flexible and stretchable electronic systems having skin-like receptor capabilities have become the emphasis of the rapid development research field, namely e-skin. [5][6][7] E-skin should imitate closely sensing capabilities of the skin; in addition, achieving e-skin will count on the development of flexible sensors, such as pressure sensors [8,9] and temperature sensors, [10,11] humidity sensors, [12,13] and strain sensors. [14,15] The sensitivity of pressure sensors is based on mechanical stimuli, which are typically utilized to monitor body motions and physiological actions, such as pulse, breath, heartbeat, and so forth.…”

An Overview of Cellulose‐Based Nanogenerators

“…While there are many excellent reviews available on nanogenerators focusing on synthetic and natural materials, mechanism, fabrication and applications, [ 1,2,11–18,32 ] there is too little emphasis given on the cellulose‐based NGs. Hence, this review analyses the recent progress on various types of NGs utilizing cellulosic biomass at different scales and morphologies.…”