nhanced electromechanical properties in low-temperature gadolinium-doped ceria composites with low-dimensional carbon allotrope

Autor(es):Mostrar menos -

Han, Jinkyu ^{[1, 2]} ; Kabir, Ahsanul ^[1] ; Tinti, Victor Buratto ^{[1, 3]} ; Santucci, Simone ^[1] ; Song, Da Som ^[4] ; Kim, So Young ^[4] ; Song, Wooseok ^[4] ; Kim, Eunyoung ^[5] ; Bu, Sang Don ^[5] ; Kern, Frank ^[6] ; de Florio, Daniel Zanetti ^[3] ; Esposito, Vincenzo ^[1]

Afiliação do(s) autor(es)

^[1] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby - Denmark

^[2] ASTAR, Inst Mat Res & Engn, Singapore 138634 - Singapore

^[3] Fed Univ ABC UFABC, Engn Modelling & Appl Social Sci Ctr CECS, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[4] Korea Res Inst Chem Technol KRICT, Thin Film Mat Res Ctr, Daejeon 34114 - South Korea

^[5] Jeonbuk Natl Univ, Res Inst Phys & Chem, Dept Phys, Jeonju 54896 - South Korea

^[6] Univ Stuttgart, Inst Mfg Technol Ceram Components & Composites, D-70569 Stuttgart - Germany

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS CHEMISTRY A; v. 10, n. 8, p. 4024-4031, FEB 22 2022.
• Citações Web of Science: 0

Resumo

We couple the spark plasma sintering (SPS) technique with the ball mill process to fabricate a new electro-chemo-mechanical functional carbon-metal oxide hybrid material. Graphene oxide (GO) or carbon nanotubes (CNT) carbon allotropes are mechanically mixed with gadolinium-doped ceria (CGO). SPS allows consolidating dense carbon-metal oxide hybrids with uniform morphology and high crystallinity. The carbon allotropes and SPS lead to highly reduced CGO. The metal oxide presents a chemically tuned grain boundary with highly oxygen defect concentration at the near-grain boundary region. The hybrid interface can hinder chemical oxidation at high-temperature depending on the carbon allotropy. As a result, the hybrid materials with CNT display high ionic conductivity and activation energy, reducing the space charge layer and charge distribution. This feature enhances the electromechanical properties at room temperature. We especially disclose electrostriction in the CNT-based hybrids superior to the pure CGO and follow a non-Newnham relation. Notably, integrating carbon materials with metal oxides using the SPS can generally be applied to synthesising a range of functional metal oxide composite. (AU)

• Processo FAPESP: 17/11937-4 - Rota sustentável para a conversão de metano com tecnologias eletroquímicas avançadas
• Beneficiário: Fabio Coral Fonseca
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 15/24999-2 - Novos compostos cerâmicos para células a combustível de óxidos sólidos protônicas
• Beneficiário: Daniel Zanetti de Florio
• Modalidade de apoio: Auxílio à Pesquisa - Regular