Fig. 14From: Structural and Chemical Modifications Towards High-Performance of Triboelectric NanogeneratorsCharge injection techniques: a a process of the ion injection on the FEP film (Reproduced with permission from Ref. [89]); b a structure of the high-performance TENG and schematic image of the equipment used for charge injection (Reproduced with permission from Ref. [90])Back to article page