A 3D-printed stretchable structural supercapacitor with active stretchability/flexibility and remarkable volumetric capacitance. Issue 27 (2nd July 2020)

• Record Type: Journal Article
• Authors: Chang, Peng; Mei, Hui; Tan, Yuanfu; Zhao, Yu; Huang, Weizhao; Cheng, Laifei
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 27(2020)
• Page Start: 13646
• Page End: 13658
• Publication Date: 2020-07-02
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta04460a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : 3D-printed stretchable negative Poisson's ratio structural CoNi2 S4 /NiCo-LDHs-based supercapacitor with active stretchability/flexibility and remarkable volumetric capacitance are built. Abstract : With the rapid growth and advance in the Internet of things and flexible/on-skin electronics, stretchable/flexible energy storage devices are being unprecedentedly needed and widely pursued. However, it remains a great challenge to realize devices with both high storage capacity and satisfactory mechanical stretchability/flexibility. Herein, by synergistically combining 3D printing with electrodeposition, a 3D-printed stretchable structural supercapacitor with thick electrodes and a 3D Negative Poisson's Ratio (NPR) multicellular framework was developed. Benefiting from the well-designed NPR lattice electrode architecture and unique 3D nanoflower-on-nanosheet structured CoNi2 S4 /NiCo-LDHs nanocomposites, the assembled stretchable symmetric supercapacitor was highly stretchable (up to ∼55%) and flexible (up to 180°) with a favorable capacitance of 28.71 F cm −3, superior energy density of 0.582 mW h cm −3 and satisfied stability in stretching and bending cycles (75.2% of its initial capacitance after 1000 periodic stretch/release cycles), which are highly comparable to those obtained for previously reported stretchable supercapacitors. The strategy proposed here provides new insights in developing next-generation highly customized 3D structural strengthening energy storage devices for human–machine interfaces and real wearable and intelligent miniaturized electronics.