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. 2021 Sep 24;13:201. doi: 10.1007/s40820-021-00729-w

Fig. 3.

Fig. 3

a EHFs-STENG and b its working mechanism diagram. c The corresponding VOC, ISC, and QSC of the STENG. d VOC of the STENG with various frequencies (fixed pressure 10 N). e The output performance under the resistance of 1 kΩ–1GΩ. f VOC of STENG in a wet environment within one week. g Long-term stability test of the STENG