A printed highly stretchable supercapacitor by a combination of carbon ink and polymer network

Purposive Design of Stretchable Composite Electrodes for Strain‐Negative, Strain‐Neutral, and Strain‐Positive Ionic Sensors

“…Since fillers in the upper layer are connected to the stable percolation network in the lower layer, the electrical performance of the double-layer composite is less susceptible to mechanical stretching. [34][35][36][37][38][39][40][41] The fillers in the upper layer are partially exposed to the air. Since the air-exposed fillers effectively contribute to the electrochemical interaction with the electrolyte, the change of the impedance spectrum under stretching is governed by the effective fraction of the air-exposed fillers.…”

Mini Review of Reliable Fabrication of Electrode under Stretching for Supercapacitor Application

“…Carbon particles are added to hydrogels to form stretchable electronic conductors, which remarkably increase the performance of supercapacitors [37]. Song et al introduced technology for fabricating stretchable supercapacitors by coating ink on a hydrogel elastomer [44]. Supercapacitors can be fabricated (Figure 3A) with an ink consisting of mixture of graphene flakes and carbon nanotubes [44].…”

“…Song et al introduced technology for fabricating stretchable supercapacitors by coating ink on a hydrogel elastomer [44]. Supercapacitors can be fabricated (Figure 3A) with an ink consisting of mixture of graphene flakes and carbon nanotubes [44]. A binary solvent consisting of water and diethylene glycol permeates the percolating network of electrodes penetrated in the polymer matrix [44].…”

A Review of Structure Engineering of Strain‐Tolerant Architectures for Stretchable Electronics

“…[ 60 ] Apart from a few exceptional cases, intrinsically stretchable materials show inferior electrical performance to conventional brittle counterparts, especially under demanding circumstances such as under high‐frequency alternating currents or exposure to environmental contamination, oxygen, or moisture. [ 73,74 ] For example, the metal materials shaped with different dimensions (e.g., nanoparticles, nanowires, and nanoflakes or nanosheets) and allotropes of carbon (carbon nanotubes, graphene, [ 75 ] and carbon blacks [ 76 ] ) with polymer matrix can be highly stretchable but presents much lower conductivity than the bulk film material. The mobility of the newly developed stretchable semiconductors, such as poly(3‐hexylthiophene) (P3HT, ≈3×10 −3 cm 2 V −1 s −1 ), [ 61 ] poly(tetrathienoacene‐diketopyrrolopyrrole) (PTDPPTFT4, ≈1.5×10 −1 cm 2 V −1 s −1 ) [ 77 ] and poly(2,5‐bis(2‐octyldodecyl)−3,6‐di(thiophen‐2‐yl)diketopyrrolo[3,4‐c]pyrrole‐1,4‐dione‐alt‐thieno[3,2‐b]thiophen) (DPPT‐TT, ≈1 cm 2 V −1 s −1 ) [ 71 ] is several orders of magnitude lower than the conventional counterparts, e.g., amorphous InGaZnO, or a‐IGZO (10‐100 cm 2 V −1 s −1 ).…”