RT Journal Article
T1 Optimizing polyoxometalate electrodes for energy storage via cation design and thermal activation 
A1 Vizcaíno Anaya, Lucía
A1 Giner Rajala, Óscar
A1 Herreros Lucas, Carlos
A1 Rodríguez Martínez, Héctor
A1 Giménez López, María del Carmen
K1 Capacitance
K1 Cations
K1 Electrochemistry
K1 Electrodes
K1 Polyoxometalates
AB Polyoxometalates (POM) are promising materials for electrochemical applications, such as supercapacitors. However, their stability in aqueous electrolytes is compromised due to POM cluster leaching. To mitigate this issue, POM can be combined with organic counter cations, which reduce their solubility in water and influence interactions with carbon support materials. Nevertheless, further research is needed to determine the optimal characteristics and electrode design for maximizing performance. In this work, a synergistic methodology to investigate POM compounds bearing cations with three core functionalities (ammonium, imidazolium, and pyridinium) and varying alkyl side chain lengths, is developed in order to elucidate and optimize the effects of hydrophobicity on the structure of organic–inorganic hybrid materials, electrode films, and their electrochemical performance. The results show that, although cations with long alkyl chains exhibit lower capacitance, they can be activated through molecular rearrangement in the solid state, facilitated by the flexibility of these chains within the structure. By combining thermal and electrochemical techniques, the electrode materials are optimized. These findings demonstrate that the careful selection of counter-cations with the appropriate molecular structures, followed by a thermal activation protocol, is key to developing more efficient and durable energy storage systems
PB Chemistry Europe
YR 2025
FD 2025-08-01
LK https://hdl.handle.net/10347/44069
UL https://hdl.handle.net/10347/44069
LA eng
NO Vizcaíno-Anaya, L., Giner-Rajala, Ó., Herreros-Lucas, C., Rodríguez, H., & Giménez-López, M. del C. (2025). Front Cover: Optimizing polyoxometalate electrodes for energy storage via cation design and thermal activation. Chemistry–Methods, 5(9), e202500046. https://doi.org/10.1002/cmtd.202500046
NO This work received financial support from the Ministry of Science of Spain (PID2021-127341OB-I00, TED2021-131451B-C21, and PDC2022-133925-I00 for M.d.C.G.-L.), the European Research Council (ERC) [Starting Grant (NANOCOMP-679124) and ZABCAT (966743) for M.d.C.G.-L.], the Xunta de Galicia (Centro Singular de Investigación de Galicia accreditation 2023–2027, ED431G 2023/03; ED431C 2024/05, the Oportunius Research Professor Program (Gain) for M.d.C.G.-L. and ED431B 2023/22 for H.R.), and the European Union (European Regional Development FundERDF for M.d.C.G.-L.). L.V.-A. acknowledges the Ministry of Universities of Spain for her predoctoral fellowship FPU20/01072.
DS Minerva
RD 28 abr 2026