A Shape‐Adaptive Thin‐Film‐Based Approach for 50% High‐Efficiency Energy Generation Through Micro‐Grating Sliding Electrification

Effectively harvesting ambient mechanical energy is the key for realizing self‐powered and autonomous electronics, which addresses limitations of batteries and thus has tremendous applications in sensor networks, wireless devices, and wearable/implantable electronics, etc. Here, a thin‐film‐based micro‐grating triboelectric nanogenerator (MG‐TENG) is developed for high‐efficiency power generation through conversion of mechanical energy. The shape‐adaptive MG‐TENG relies on sliding electrification between complementary micro‐sized arrays of linear grating, which offers a unique and straightforward solution in harnessing energy from relative sliding motion between surfaces. Operating at a sliding velocity of 10 m/s, a MG‐TENG of 60 cm2 in overall area, 0.2 cm3 in volume and 0.6 g in weight can deliver an average output power of 3 W (power density of 50 mW cm−2 and 15 W cm−3) at an overall conversion efficiency of ∼50%, making it a sufficient power supply to regular electronics, such as light bulbs. The scalable and cost‐effective MG‐TENG is practically applicable in not only harvesting various mechanical motions but also possibly power generation at a large scale.

[1]  Zhong Lin Wang,et al.  Linear-grating triboelectric generator based on sliding electrification. , 2013, Nano letters.

[2]  Zhong Lin Wang,et al.  Toward large-scale energy harvesting by a nanoparticle-enhanced triboelectric nanogenerator. , 2013, Nano letters.

[3]  George M Whitesides,et al.  Contact de-electrification of electrostatically charged polymers. , 2012, Journal of the American Chemical Society.

[4]  Caofeng Pan,et al.  Triboelectric-generator-driven pulse electrodeposition for micropatterning. , 2012, Nano letters.

[5]  Zhong Lin Wang,et al.  Transparent triboelectric nanogenerators and self-powered pressure sensors based on micropatterned plastic films. , 2012, Nano letters.

[6]  Z. Wang.  Self‐Powered Nanosensors and Nanosystems , 2012, Advanced materials.

[7]  Adnan Harb,et al.  Energy harvesting: State-of-the-art , 2011 .

[8]  B. Grzybowski,et al.  The Mosaic of Surface Charge in Contact Electrification , 2011, Science.

[9]  Y. Tai,et al.  Parylene-based electret power generators , 2008 .

[10]  Timothy C. Green,et al.  Energy Harvesting From Human and Machine Motion for Wireless Electronic Devices , 2008, Proceedings of the IEEE.

[11]  A. Bard,et al.  Electrostatic electrochemistry at insulators. , 2008, Nature materials.

[12]  J. A. Hoffer,et al.  Biomechanical Energy Harvesting: Generating Electricity During Walking with Minimal User Effort , 2008, Science.

[13]  Saibal Roy,et al.  A micro electromagnetic generator for vibration energy harvesting , 2007 .

[14]  Bartosz A Grzybowski,et al.  Controlling the growth of "ionic" nanoparticle supracrystals. , 2007, Nano letters.

[15]  S. Priya.  Advances in energy harvesting using low profile piezoelectric transducers , 2007 .

[16]  S. Beeby,et al.  Energy harvesting vibration sources for microsystems applications , 2006 .

[17]  Bernard H. Stark,et al.  Mems inertial power generators for biomedical applications , 2006 .

[18]  Taeseung D. Yoo,et al.  Generating Electricity While Walking with Loads , 2005, Science.

[19]  Joseph A. Paradiso,et al.  Energy scavenging for mobile and wireless electronics , 2005, IEEE Pervasive Computing.

[20]  Siak Piang Lim,et al.  Modeling and analysis of micro piezoelectric power generators for micro-electromechanical-systems applications , 2004 .

[21]  Jan M. Rabaey,et al.  A study of low level vibrations as a power source for wireless sensor nodes , 2003, Comput. Commun..

[22]  R. Horn,et al.  Contact electrification induced by monolayer modification of a surface and relation to acid–base interactions , 1993, Nature.

[23]  R. Horn,et al.  Contact Electrification and Adhesion Between Dissimilar Materials , 1992, Science.