Micro/nano‐wrinkled elastomeric electrodes enabling high energy storage performance and various form factors

Stretchable elastomer-based electrodes are considered promising energy storage for next-generation wearable/flexible electronics requiring various shape designs. However, these elastomeric suffer from the limited electrical conductivity of current collectors, low charge capacities, poor interfacial interactions between elastomers and conductive/active materials, lack controllability. In this study, we report hierarchically micro/nano-wrinkle-structured with notably high performance good mechanical/electrochemical stabilities, simultaneously allowing form factors. For a swelling/deswelling-involved metal nanoparticle (NP) assembly is first performed on thiol-functionalized polydimethylsiloxane (PDMS) elastomers, generating micro-wrinkled structure conductive seed layer subsequent electrodeposition. After NPs, conformal electrodeposition Ni NiCo layered double hydroxides layers homogeneous nanostructure PDMS induces formation micro/nano-wrinkled surface morphology large active area conductivity. Based unique approach, formed show higher areal capacity superior rate capability than conventional while maintaining their electrical/electrochemical properties under external mechanical deformation. This notable can be further enhanced by using spiral-structured (stretchability ~500%) porous-structured (areal ~280 μAh cm−2).