TY - JOUR
T1 - In Situ Aniline-Polymerized Interfaces on GO-PVA Nanoplatforms as Bifunctional Supercapacitors and pH-Universal ORR Electrodes
AU - Barrios Cossio, Josiel J.
AU - Acevedo Peña, Próspero
AU - Hernández-Gordillo, Agileo
AU - Desdín García, Luis F.
AU - Puente Santiago, Alain R.
AU - Echegoyen, Luis
AU - Reguera, Edilso
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/5/26
Y1 - 2020/5/26
N2 - We report unique additive-free bifunctional electrodes, composed of graphene oxide (GO), reduced GO (rGO), polyaniline (PANI), and poly(vinyl alcohol) (PVA) on carbon cloths, which were fabricated using an easy and innovative in situ aniline polymerization strategy under mild conditions. The resulting electrodes were tested for energy storage and energy conversion reactions, and they exhibited competitive bifunctional supercapacitor and pH-universal oxygen reduction reaction (ORR) properties. Surprisingly, GO/PANI/PVA electrodes delivered a significant specific capacitance of 450 F·g-1 at a current density of 25 A·g-1, an ultrahigh cycling stability of 93% after 10 000 cycles of charge-discharge at 10 A·g-1, and an outstanding ORR onset potential value of 0.93 V vs reversible hydrogen electrode (RHE) in basic media. Additionally, the nanocomposite showed remarkable stability in acid media for the electroreduction of oxygen, maintaining 98% of the initial current applied after 25 000 s. The impressive performance of GO/PANI/PVA electrodes was attributed to their excellent electron-transfer (ET) properties, improved conductivity, and the highly stable behavior of PANI-functionalized GO layers.
AB - We report unique additive-free bifunctional electrodes, composed of graphene oxide (GO), reduced GO (rGO), polyaniline (PANI), and poly(vinyl alcohol) (PVA) on carbon cloths, which were fabricated using an easy and innovative in situ aniline polymerization strategy under mild conditions. The resulting electrodes were tested for energy storage and energy conversion reactions, and they exhibited competitive bifunctional supercapacitor and pH-universal oxygen reduction reaction (ORR) properties. Surprisingly, GO/PANI/PVA electrodes delivered a significant specific capacitance of 450 F·g-1 at a current density of 25 A·g-1, an ultrahigh cycling stability of 93% after 10 000 cycles of charge-discharge at 10 A·g-1, and an outstanding ORR onset potential value of 0.93 V vs reversible hydrogen electrode (RHE) in basic media. Additionally, the nanocomposite showed remarkable stability in acid media for the electroreduction of oxygen, maintaining 98% of the initial current applied after 25 000 s. The impressive performance of GO/PANI/PVA electrodes was attributed to their excellent electron-transfer (ET) properties, improved conductivity, and the highly stable behavior of PANI-functionalized GO layers.
KW - graphene oxide
KW - oxygen reduction reaction
KW - poly(vinyl alcohol)
KW - polyaniline
KW - supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85087587317&partnerID=8YFLogxK
U2 - 10.1021/acsaem.0c00361
DO - 10.1021/acsaem.0c00361
M3 - Artículo
SN - 2574-0962
VL - 3
SP - 4727
EP - 4737
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 5
ER -