Mixed Ionic and Electronic Conductivity in a Tetrathiafulvalene-Phosphonate Metal–Organic Framework
Year: 2024
Type: article
Abstract: Mixed ionic-electronic conductors have great potential as materials for energy storage applications. However, despite their promising properties, only a handful of metal–organic frameworks (MOFs) provide efficient pathways for both ion and electron transport. This work reports a proton–electron dual-conductive MOF based on tetrathiafulvalene(TTF)-phosphonate linkers and lanthanum ions. The formation of regular, partially oxidized TTF stacks with short S···S interactions facilitates electron transport via a hopping mechanism, reporting a room-temperature conductivity of 7.2 × 10 –6 S cm –1 . Additionally, the material exhibits a proton conductivity of 4.9 × 10 –5 S cm –1 at 95% relative humidity conditions due to the presence of free −POH groups, enabling efficient proton transport pathways. These results demonstrate the potential of integrating electroactive building blocks along with phosphonate groups toward the development of mixed ionic-electronic conductors.
DOI: 10.1021/jacs.4c13792
Institutions: Laboratório Associado CICECO – Instituto de Materiais de Aveiro, University of Aveiro, Massachusetts Institute of Technology, Universitat de València, Universidade de Santiago de Compostela, Centro Singular de Investigación en Química Biológica y Materiales Moleculares, Axencia Galega de Innovacion
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Ministerio de Ciencia, Innovación y Universidades, European Commission, Ministerio de Economía y Competitividad, Xunta de Galicia, Centro de Investigação em Materiais Cerâmicos e Compósitos, HORIZON EUROPE Framework Programme, European Research Council, Fundação para a Ciência e a Tecnologia, Division of Materials Research, NextGenerationEU
Awards: CICECO-Instituto de Materiais de Aveiro, Materiais para Eléctrodos de Baterias de Iões de Lítio Baseados em Redes Metalo-Orgânicas com Actividade Redox, G1918496035, G2984126938, G3292045690, G3527812803, G3592153812, G4681034566, Electroactive Metal-Organic Framework for Electronic Applications, CICECO – Instituto de Materiais de Aveiro, G538229566, CICECO-Instituto de Materiais de Aveiro, G6818627905, G6971996426, G6995215057, G7937479133, G8066153095, G8621933924, G995712995
OpenAlex ID: W4405598256