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The output voltage, current, and power of PENGs generated under periodic mechanical compression of 2 kPa with a) 30 wt% BaTiO3 nanofibers and different MWCNT contents (0–5 wt%), b) 2.0 wt% MWCNT, and different BaTiO3 nanofiber contents (10–50 wt%). Cross‐sectional SEM images of PENGs with c) 2.0 wt% MWCNTs and 30 wt% BaTiO3 nanofibers, d) 2.0 wt% MWCNTs, and 40 wt% BaTiO3 nanofibers. Reproduced with permission.[ 412 ] Copyright 2017, Elsevier Ltd.
