dc.contributor.author |
Dubal, Deepak P. |
dc.contributor.author |
Rueda García, Daniel |
dc.contributor.author |
Marchante, Carlos |
dc.contributor.author |
Benages Vilau, Raúl |
dc.contributor.author |
Gómez-Romero, Pedro |
dc.date |
2018 |
dc.identifier |
https://ddd.uab.cat/record/214999 |
dc.identifier |
urn:10.1002/tcr.201700116 |
dc.identifier |
urn:oai:ddd.uab.cat:214999 |
dc.identifier |
urn:scopus_id:85042305122 |
dc.identifier |
urn:articleid:15280691v18n7p1076 |
dc.identifier |
urn:wos_id:000438733200035 |
dc.identifier |
urn:icn2uab:4132460 |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
|
dc.relation |
Ministerio de Economía y Competitividad MAT2015-68394-R |
dc.relation |
Ministerio de Economía y Competitividad SEV-2013-0295 |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-870 |
dc.relation |
Chemical record ; Vol. 18, issue 7-8 (July 2018), p. 1076-1084 |
dc.rights |
open access |
dc.rights |
Tots els drets reservats. |
dc.rights |
https://rightsstatements.org/vocab/InC/1.0/ |
dc.subject |
Electroactive Nanofluids |
dc.subject |
Reduced Graphene Oxide (RGO) |
dc.subject |
Polyoxometalates |
dc.subject |
Hybrid materials |
dc.title |
Hybrid graphene-polyoxometalates nanofluids as liquid electrodes for dual energy storage in novel flow cells |
dc.type |
Article |
dc.description.abstract |
Solid Hybrid materials abound. But flowing versions of them are new actors in the materials science landscape and in particular for energy applications. This paper presents a new way to deliver nanostructured hybrid materials for energy storage, namely, in the form of nanofluids. We present here the first example of a hybrid electroactive nanofluid (HENFs) combining capacitive and faradaic energy storage mechanisms in a single fluid material. This liquid electrode is composed of reduced graphene oxide and polyoxometalates (rGO-POMs) forming a stable nanocomposite for electrochemical energy storage in novel Nanofluid Flow Cells. Two graphene based hybrid materials (rGO-phosphomolybdate, rGO-PMo₁₂ and rGO-phosphotungstate, rGO-PW₁₂) were synthesized and dispersed with the aid of a surfactant in 1 M H₂SO₄ aqueous electrolyte to yield highly stable hybrid electroactive nanofluids (HENFs) of low viscosity which were tested in a home-made flow cell under static and continuous flowing conditions. Remarkably, even low concentration rGO-POMs HENFs (0.025 wt%) exhibited high specific capacitances of 273 F/g(rGO-PW₁₂) and 305 F/g(rGO-PMo₁₂) with high specific energy and specific power. Moreover, rGO-POM HENFs show excellent cycling stability (∼95 %) as well as Coulombic efficiency (∼77-79 %) after 2000 cycles. Thus, rGO-POM HENFs effectively behave as real liquid electrodes with excellent properties, demonstrating the possible future application of HENFs for dual energy storage in a new generation of Nanofluid Flow Cells. |