Wireless power transfer—the transmission of electromagnetic energy without physical connectors such as wires or waveguides—typically exploits electromagnetic field control methods that were first proposed decades ago and requires some essential parameters (such as efficiency) to be sacrificed in favour of others (such as stability). In recent years, novel approaches to electromagnetic field manipulation have been developed that can be used to create advanced forms of wireless power transfer. Here we review the development of novel physical effects and materials for wireless power transfer. We explore techniques based on coherent perfect absorption, parity–time symmetry and exceptional points, and on-site power generation. We also explore the use of metamaterials and metasurfaces in wireless power transfer, and the use of acoustic power transfer. Finally, we highlight potential routes for the further development of wireless power transfer technology.
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This work is supported in part by the Natural Science Foundation of China (62101154) and Natural Science Foundation of Heilongjiang Province of China (LH2021F013). The section ‘New concepts of WPT’ was supported by the Russian Science Foundation (project 20-72-10090), and the section ‘Metamaterials and metasurfaces for WPT’ was supported by the Russian Science Foundation (project 21-79-30038). This work is partially supported by the Academy of Finland (Academy of Finland postdoctoral researcher grant 333479). M.S. acknowledges support from the Fundamental Research Funds for the Central Universities (3072021CFJ0802) and Research Funds for the Key Laboratory of Advanced Marine Communication and Information Technology of the Ministry of Industry and Information Technology (AMCIT21V2).
The authors declare no competing interests.
Peer review information Nature Electronics thanks the anonymous reviewers for their contribution to the peer review of this work.
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Song, M., Jayathurathnage, P., Zanganeh, E. et al. Wireless power transfer based on novel physical concepts. Nat Electron 4, 707–716 (2021). https://doi.org/10.1038/s41928-021-00658-x
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