dc.contributor.author |
Zhu, Jun-Jie |
dc.contributor.author |
Hemesh, Avireddy |
dc.contributor.author |
Jacas Biendicho, Jordi |
dc.contributor.author |
Martinez-Soria, Luis |
dc.contributor.author |
Rueda García, Daniel |
dc.contributor.author |
Morante, Joan Ramon |
dc.contributor.author |
Ballesteros, Belén |
dc.contributor.author |
Gómez-Romero, Pedro |
dc.date |
2022 |
dc.date.accessioned |
2022-12-13T07:37:56Z |
dc.date.available |
2022-12-13T07:37:56Z |
dc.date.issued |
2022-12-13 |
dc.identifier |
https://ddd.uab.cat/record/266356 |
dc.identifier |
urn:10.1016/j.jcis.2022.04.170 |
dc.identifier |
urn:oai:ddd.uab.cat:266356 |
dc.identifier |
urn:scopus_id:85131146785 |
dc.identifier |
urn:articleid:10957103v623p947 |
dc.identifier |
urn:icn2uab:6553358 |
dc.identifier.uri |
http://hdl.handle.net/2072/528994 |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
|
dc.relation |
Agencia Estatal de Investigación RTI2018-099826-B-I00 |
dc.relation |
Agencia Estatal de Investigación SEV-2017-0706 |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1246 |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-00870 |
dc.relation |
Journal of colloid and interface science ; Vol. 623 (Oct. 2022), p. 947-961 |
dc.rights |
open access |
dc.rights |
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
dc.rights |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
dc.subject |
Hybrid electroactive materials |
dc.subject |
MXene |
dc.subject |
Polyoxometalates |
dc.subject |
Organic |
dc.subject |
Supercapacitors |
dc.title |
Rational design of MXene/activated carbon/polyoxometalate triple hybrid electrodes with enhanced capacitance for organic-electrolyte supercapacitors |
dc.type |
Article |
dc.description.abstract |
Altres ajuts: ICN2 and IREC are funded by the CERCA programme / Generalitat de Catalunya, and ICN2. This work has been carried out within the framework of doctoral program (PhD) of Material Science (Department of Physics) of Universitat Autònoma de Barcelona (UAB). |
dc.description.abstract |
We report a triple hybrid electrode (MXene/activated carbon (AC)/polyoxometalates (POMs)) combining the merits of three materials: MXene (high volumetric capacitance), AC (high gravimetric capacitance) and Phosphotungstate (fast redox). Phosphotungstic acid (HPW12) and tetraethylammonium phosphotungstate (TEAPW12) were the two POMs used to prepare MXene/AC/POMs triple hybrids. MXene/AC/TEAPW12 outperformed MXene/AC/HPW12 in 1 M tetraethylammonium tetrafluoroborate (TEABF4)/acetonitrile. Nano-dispersion of POMs facilitates charge storage through surface capacitive processes (91% at 2 mV s). MXene/AC/TEAPW12 delivered significantly higher gravimetric capacitance (87F g at 1 mV s) than MXene (40F g at 1 mV s) in the same organic electrolyte, without sacrificing much volumetric capacitance (less than 10%). The gravimetric capacitance of the triple hybrid was similar to that of MXene/AC, whereas its volumetric capacitance was 1.5 times higher. Replacing TEA cations with 1-ethyl-3-methylimidazolium cations (EMIM), the capacitance improved by 21%. Coupled with AC positive electrodes in an asymmetric cell, MXene/AC/TEAPW12 delivered 4.6 times higher gravimetric energy density and 3.5 times higher volumetric energy density than a similar MXene asymmetric cell at relatively high-power densities. This study proves that MXene/AC/TEAPW12 combines the merits and compensates for the demerits of each component and is a promising electrode material for organic-electrolyte supercapacitors. |