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. 2021 Mar 17;7:25. doi: 10.1038/s41378-021-00248-z

Fig. 2. Portable and wearable hybrid energy harvester.

Fig. 2

a Piezoelectric and thermoelectric hybrid energy-scavenging nanogenerator. Reprinted from ref. 78 with permission. b Solar-triboelectric hybrid energy harvesting system. Reprinted from ref. 79 with permission. c Hybrid energy harvester based on triboelectric and electromagnetic principles. Reprinted from ref. 80 with permission.