(a) TENG formed by using 10 Ni-coated polyester strips as longitude lines and 10 parylene-Ni-coated strips as latitude lines. Reproduced with permission [7]. Copyright 2015, John Wiley and Sons. (b) Self-power system that used a fabric-structure TENG and textile-structure supercapacitor. Reproduced with permission [63]. Copyright 2015, John Wiley and Sons. (c) TENG made of a commercial nylon-fabric strip, polyester-fabric strip, and homemade conductive silver-fabric strip. Reproduced with permission [64]. Copyright 2014, American Chemical Society. (d) TENG manufactured using Ni-coated polyester conductive-textile strips and silicone rubber-Ni-coated polyester strips by the traditional “plain grain” method. Reproduced with permission [65]. Copyright 2017, Elsevier.