Assembly and interaction of polyaniline chains: impact on electro- and physical-chemical behavior

0488904 - ÚMCH 2019 RIV US eng J - Článek v odborném periodiku
Tomšík, Elena - Kohut, Olena - Ivanko, Iryna - Pekárek, Michal - Bieloshapka, Igor - Dallas, P.
Assembly and interaction of polyaniline chains: impact on electro- and physical-chemical behavior.
Journal of Physical Chemistry C. Roč. 122, č. 14 (2018), s. 8022-8030. ISSN 1932-7447. E-ISSN 1932-7455
Grant CEP: GA ČR(CZ) GA15-14791S
Grant ostatní: OPPK(XE) CZ.2.16/3.1.00/21545
Program: OPPK
Institucionální podpora: RVO:61389013 ; RVO:68378271
Klíčová slova: PANI * pseudocapacitor * fibril
Obor OECD: Physical chemistry; Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impakt faktor: 4.309, rok: 2018

Polyaniline (PANI) is one of the promising candidates for utilization as electrode material in supercapacitors, and its electro- and physical–chemical properties have been studied for several decades. However, there are fundamental questions that need to be answered. For example, is it possible to obtain and characterize individual PANI chains or what is the impact of chains interactions on electro- and physical–chemical behavior? To that end, we isolated and characterized individual PANI chains alongside nanofibrillar assemblies for the first time, and moreover, we demonstrate that the interaction between polyaniline chains and their assembly into nanofibrils have a crucial impact on electro- and physical–chemical behaviors of PANI. Additionally, the optical transitions of three different conglomerations and protonation states are studied and correlated with the structural and electrochemical characterization. The mechanism of the redox process for individual PANI chains and PANI nanofibrils is proposed. The specific capacitance of 1050 F/g (at 25 A/g of specific current) for three-electrode configuration and 450 F/g (at 9 A/g of specific current) for two-electrode configuration was obtained, which is the highest value reported to date.
Trvalý link: http://hdl.handle.net/11104/0283583