A new method to prepare no-binder, integral electrodes-separator, asymmetric all-solid-state flexible supercapacitor derived from bacterial cellulose. (November 2017)

• Record Type: Journal Article
• Authors: Lv, Xvdan; Li, Guohui; Li, Dawei; Huang, Fenglin; Liu, Wenting; Wei, Qufu
• Is Part Of: Journal of physics and chemistry of solids. Volume 110(2017)
• Page Start: 202
• Page End: 210
• Publication Date: 2017-11
• Subjects: Bacterial cellulose -- PANI -- Supercapacitor -- Integral electrodes-separator; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2017.06.017
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Bacterial cellulose (BC) with unique three dimensional multilayer network structure and excellent mechanical strength is used for the substrate of the all-solid-state flexible supercapacitor. The technique was realized by in-situ depositing conductive polymer polyaniline (PANI) on BC, through both peeling off one side of the multilayer PANI/BC composition film and filtrating KOH activated pyrolysis PANI/BC (KPBC) obtained N- and O-enriched carbon powders on the peeling side. The flexible integral electrode-separator supercapacitor device was about 15 μm, which exhibited the well bending and stretching performance. The film supercapacitor also showed excellent cycle life with maximum 28.3 F cm −3 volumetric capacitance, and retains 100% over 2500 charge/discharge cycles at the 0.1 A g −1 current density. In addition, the flexible supercapacitor only indicated 2.48 Ω solution resistances (Rs ) at 1 mol PVA/H2 SO4 electrolyte. This flexible film supercapacitor has great potential in wearable devices. Graphical abstract: Highlights: High capacitance N- and O-enriched activated carbon was obtained by pyrolysis and active polyaniline coated BC. Low cost, environmental friendly materials were used to prepare flexible membrane supercapacitor. A new method to prepare no-binder, integral electrodes-separator all-solid-state flexible supercapacitor was achieved. The 3D network, multilayers structure of bacterial cellulose membrane was fully utilized. The flexible supercapacitor showed low solution resistances at 1 mol PVA/H2 SO4 electrolyte.