Thermally Driven Transport and Relaxation Switching Self‐Powered Electromagnetic Energy Conversion

• Published in: Small (Weinheim an der Bergstrasse, Germany) Vol. 14; no. 29; pp. e1800987 - n/a
• Main Authors: Cao, Maosheng, Wang, Xixi, Cao, Wenqiang, Fang, Xiaoyong, Wen, Bo, Yuan, Jie
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 19-07-2018
• Subjects: Charge transport; Competitive materials; Electric power generation; electromagnetic energy conversion; Electromagnetic radiation; Energy; Energy conversion; Energy harvesting; Energy storage; Gene sequencing; Genes; Graphene; Nanogenerators; Nanotechnology; Performance degradation; relaxation; self‐power; Silicon dioxide; Switching theory; self-power; electromagnetic energy conversion; charge transport; graphene; relaxation
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.201800987

Electromagnetic energy radiation is becoming a “health‐killer” of living bodies, especially around industrial transformer substation and electricity pylon. Harvesting, converting, and storing waste energy for recycling are considered the ideal ways to control electromagnetic radiation. However, heat‐generation and temperature‐rising with performance degradation remain big problems. Herein, graphene‐silica xerogel is dissected hierarchically from functions to “genes,” thermally driven relaxation and charge transport, experimentally and theoretically, demonstrating a competitive synergy on energy conversion. A generic approach of “material genes sequencing” is proposed, tactfully transforming the negative effects of heat energy to superiority for switching self‐powered and self‐circulated electromagnetic devices, beneficial for waste energy harvesting, conversion, and storage. Graphene networks with “well‐sequencing genes” (w = Pc/Pp > 0.2) can serve as nanogenerators, thermally promoting electromagnetic wave absorption by 250%, with broadened bandwidth covering the whole investigated frequency. This finding of nonionic energy conversion opens up an unexpected horizon for converting, storing, and reusing waste electromagnetic energy, providing the most promising way for governing electromagnetic pollution with self‐powered and self‐circulated electromagnetic devices.
Thermally driven relaxation and charge transport are demonstrated with a competitive synergy on electromagnetic energy conversion, based on “sequencing genes” of graphene‐silica. It tactfully transforms negative effect of heat energy to superiority of switching self‐powered electromagnetic energy conversion, opening a new horizon of governing electromagnetic pollution.