High-rate polyaniline/carbon-cloth electrodes: effect of mass loading on the pseudocapacitive performance

0481355 - ÚMCH 2018 RIV DE eng J - Journal Article
Tomšík, Elena - Ivanko, Iryna - Kohut, Olena - Hromádková, Jiřina
High-rate polyaniline/carbon-cloth electrodes: effect of mass loading on the pseudocapacitive performance.
ChemElectroChem. Roč. 4, č. 11 (2017), s. 2884-2890. ISSN 2196-0216. E-ISSN 2196-0216
R&D Projects: GA ČR(CZ) GA15-14791S
Grant - others:OPPK(XE) CZ.2.16/3.1.00/21545
Program: OPPK
Institutional support: RVO:61389013
Keywords : pseudocapacitors * polyaniline * high charge-discharge rate
OECD category: Physical chemistry
Impact factor: 4.446, year: 2017

Polyaniline/carbon-cloth electrodes with various mass loadings of polyaniline are prepared for use as high-rate charge/discharge pseudocapacitors. The dependence of the capacitance, energy, and power density on the polyaniline mass loading is studied in the current work to determine the operating power spectrum of the polyaniline/carbon-cloth electrodes. In this work, we demonstrate for the first time that the polyaniline/carbon-cloth electrode simultaneously possesses high values of the specific and areal characteristics. Moreover, we show that such high values of the specific power and energy were obtained with time constants in the range from 0.8 to 6.25 s, depending on the amount of active material used. It is determined that the maximum areal capacitance is obtained for the highest mass loading of polyaniline with a value of 2450 mF/cm2 measured at 75 mA/cm2, corresponding to an areal energy density of 265 µWh/cm2 and areal power density of 48 mW/cm2. On the other hand, the maximum specific capacitance is obtained for the lowest mass loading of polyaniline with a value of 1120 F/g measured at 28 A/g, corresponding to a specific energy of 147 Wh/kg and specific power of 19 kW/kg.
Permanent Link: http://hdl.handle.net/11104/0277430