Facile Preparation of High‐Performance Stretchable Fiber‐Like Electrodes and Supercapacitors

Abstract

A facile preparation method was proposed to fabricate core‐sheath structured elastic cord/carbon nanotube (CNT)/polyaniline (PANI) composite fibers with excellent electrochemical performance and good mechanical stretchability. Specifically, we developed a “surface melting for stable attachment” strategy to combine CNT/PANI composite film tightly with elastic cord fiber. The fabricated fiber‐like elastic cord/CNT/PANI composite electrode displays a large gravimetric capacitance of 394 F g−1(corresponds to a linear specific capacitance of 15.4 mF cm−1) and superior rate capability. The electrode capacitance has no obvious decrease when the electrode was stretched from original state to a large stretch ratio of 100%, and the capacitance maintains 98% after 100 stretch‐release cycles; besides, the electrode at stretching state possesses almost same cycling stability and rate capability as it at original state. These results indicate robust micro‐structure and outstanding stretchability of our fiber‐like elastic cord/CNT/PANI composite electrode. Consequently, all‐solid‐state supercapacitors assembled based on the fiber‐like electrode also exhibit impressive stretchability. Overall, the proposed facile method for producing stretchable fiber‐like electrodes/supercapacitors is believed to further boost the practical application of stretchable and wearable energy storage devices.

Prospects and Challenges of Flexible Stretchable Electrodes for Electronics

“…After the elastic yarn is released, the wavy electrode material is obtained. For example, Ren et al proposed a method to fabricate composite electrodes by tightly combining CNT/PANI composite membranes with elastic filaments [136]. The wavy structure can be obtained by stretching the elastic filaments, attaching them to the CNT membranes, and then releasing them (Figure 8b).…”

Biomimetic Synthesis of PANI/Graphitic Oxidized Carbon Nitride for Supercapacitor Applications

“…The following supporting information can be downloaded at: https: //www.mdpi.com/article/10.3390/polym14183913/s1, References [66][67][68][69][70][71][72][73][74][75][76] are cited in the supplementary materials.…”

Integrated Construction of a Long‐Life Stretchable Zinc‐Ion Capacitor

“…Furthermore, based on the prepared components, device assembly should be the next topic to be discussed. Generally, researchers focus more on device morphology, [26][27][28][29][30][31][32][33][34] but often neglect the interlayer bonding of each component. Even based on the same matrix material, different components are difficult to have completely consistent mechanical deformation behavior (such as rebound speed and residual strain).…”