Abstract
As an emerging technology for harvesting mechanical energy, low surface charge density greatly hinders the practical applications of triboelectric nanogenerators (TENGs). Here, a high-performance TENG based on charge shuttling is demonstrated. Unlike conventional TENGs with static charges fully constrained on the dielectric surface, the device works based on the shuttling of charges corralled in conduction domains. Driven by the interaction of two quasi-symmetrical domains, shuttling of two mirror charge carriers can be achieved to double the charge output. Based on the mechanism, an ultrahigh projected charge density of 1.85 mC m−2 is obtained in ambient conditions. An integrated device for water wave energy harvesting is also presented, confirming its feasibility for practical applications. The device provides insights into new modes of TENGs using unfixed charges in domains, shedding a new light on high-performance mechanical energy harvesting technology.
Highlights
As an emerging technology for harvesting mechanical energy, low surface charge density greatly hinders the practical applications of triboelectric nanogenerators (TENGs)
The pump TENG injects charges of opposite signs into these two domains (The extraction of electrons is equivalent to the injection of positive charge carriers) through a rectifier, which should be able to withstand high voltage to block the charges in the domains from flowing back
In this work, the high-performance CS-TENG based on charge shuttling is demonstrated
Summary
As an emerging technology for harvesting mechanical energy, low surface charge density greatly hinders the practical applications of triboelectric nanogenerators (TENGs). The device provides insights into new modes of TENGs using unfixed charges in domains, shedding a new light on high-performance mechanical energy harvesting technology. To fill up the gap towards practical applications, there are still great needs for developing advanced mechanisms in enhancing the output, which should be facile to be integrated as practical devices working in specific environment. Based on the CS-TENG, a high-performance integrated device for wave energy harvesting was fabricated and characterized in water wave environment, successfully demonstrating the technical feasibility of the CSTENG as a fundamental device to be applied in complex structures for various practical applications. Our work provides insights into new modes of TENGs using unfixed charges in domains, shedding a new light on high-performance mechanical energy harvesting
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