A peptide-based supercapacitor and its performance improvement via TiO2 coating. Issue 17 (19th April 2018)

• Record Type: Journal Article
• Authors: Hu, Kuan; Zheng, Chao; An, Miao; Ma, Xiaohui; Wang, Lu
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 17(2018)
• Page Start: 8047
• Page End: 8052
• Publication Date: 2018-04-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta01102h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Based on their ability to self-assemble and mimic strategies that occur in nature, peptide nanomaterials offer a variety of potential applications in environmentally friendly energy storage technologies. Abstract : Based on their ability to self-assemble and mimic strategies that occur in nature, peptide nanomaterials offer a variety of potential applications in environmentally friendly energy storage technologies. Herein, we report the experimental investigations into an elaborate self-assembled dipeptide Fmoc-EF-NH2, which displayed good performance as an electrode material in a supercapacitor. In order to protect the peptide electrode from electrolyte dissolution, a thin layer of TiO2 was coated on the peptide film by atomic layer deposition. The as-prepared peptide electrodes achieved an outstanding mass-specific capacitance of 125 F g −1 at 0.1 A g −1 current density and an areal capacitance of 8.6 mF cm −2 . Furthermore, the capacitor exhibits excellent stability, in that 95% of the capacitance was retained after 5000 cycles. Additionally, the fabricated all-solid-state SCs possess excellent mechanical flexibility. To the best of our knowledge, this is the first investigation that comprehensively assessed the electrochemical performance of peptide materials.