Condensing Vapor Phase Polymerization (CVPP) of Electrochemically Capacitive and Stable Polypyrrole Microtubes

• DOI: 10.1021/acsami.7b13874
• Publication Date: 2017-11-07T15:29:35Z
• Authors: Luciano M. Santino; Erica Hwang; Yifan Diao; Yang Lu; Hongmin Wang; Qisheng Jiang; Srikanth Singamaneni; Julio M. D’Arcy
• Keywords: Polypyrrole

We introduce a novel condensing vapor phase polymerization (CVPP) strategy for depositing microtubes of the conducting polymer polypyrrole; these serve as one-dimensional hollow microstructures storing electrochemical energy. In CVPP, water droplets are structure-directing templates polypyrrole microtubes. Water condensation and occur simultaneously—conformal coatings deposit on porous substrates such hard carbon fiber paper or glass filter paper. A mechanistic evolution microtubular morphology is proposed tested based mass transport monomer vapors well reaction stoichiometry. coating PPy characterized by high reversible capacitance 342 F g–1 at 5 mV s–1 throughout 5000 cycles cyclic voltammetry low sheet resistance 70.2 Ω □–1. The open tubular structure controlled in situ during synthesis leads to electrodes that exhibit stability scanning rates up 250 retaining all stored charge, even after extensive cycling 25 s–1.