RT Journal Article
T1 Enhancing Electrochemical Properties of Walnut ShellActivated Carbon with Embedded MnO Clusters forSupercapacitor Applications
A1 Arenas Esteban, Daniel
A1 García Chamocho, Elena
A1 Carretero González, Javier
A1 Urones Garrote, Esteban
A1 Otero Díaz, Luis Carlos
A1 Ávila Brande, David
AB Activated carbon (AC) materials from renewable sources arewidely used in electrochemical applications due to their well-known high surface area. However, their application aselectrode material in double-layer electrochemical devices maybe limited due to their relatively low electrical conductivity andlightweight. To overcome these limitations, the incorporation ofpseudocapacitance metal oxide nanoparticles is an optimumapproach. These nanoparticles can provide a second energystorage mechanism to the composite, mitigating the loss ofsurface area associated with their incorporation. As a result, thecomposite material is endowed with increased conductivity andhigher density, making it more suitable for practical implemen-tation in real devices. In this study, we have incorporated a finedispersion of 1 % of MnO clusters into a highly porous activatedcarbon synthesized from walnut shells (WAC). The high-resolution electron microscopy studies, combined with theirrelated analytical techniques, allow us to determine thepresence of the cluster within the matrix carbon precisely. Theresulting MnO@WAC composite demonstrated significantlyimproved capacitive behavior compared with the WAC material,with increased volumetric capacitance and higher chargeretention at higher current densities. The composite‘s electro-chemical performance suggests its potential as a promisingelectrode material for supercapacitors, addressing drawbacksassociated with traditional AC materials.
PB Wiley
YR 2024
FD 2024-03-17
LK https://hdl.handle.net/20.500.14352/125093
UL https://hdl.handle.net/20.500.14352/125093
LA eng
NO D. A. Esteban, E. G. Chamocho, J. Carretero González, E. Urones Garrote, L. C. Otero Díaz, D. Á. Brande, Batteries & Supercaps 2024, 7, e202400101. https://doi.org/10.1002/batt.202400101
NO Agencia Estatal de Investigación
NO Plan de Recuperación, Transformación y Resiliencia (PRTR)
NO Ministerio de Ciencia, Innovación y Universidades
DS Docta Complutense
RD 25 feb 2026