Giant Polarization in Quasi-Adiabatic Ferroelectric Na+ Electrolyte for Solid-State Energy Harvesting and Storage

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

Manuela Carvalho Baptista (Autor) Outra; Hesham Khalifa (Autor) FEUP; Adão Araújo (Autor) Outra; Beatriz Arouca Maia (Autor) Outra; Manuel Souto (Autor) Outra; Maria Helena Braga (Autor) FEUP

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

Título: ADVANCED FUNCTIONAL MATERIALS

Página Inicial: 2212344

ISSN: 1616-301X

Editora: WILEY-V C H VERLAG GMBH

Indexação

ISI Web of Knowledge - 0 Citações

ISI Web of Science

Scopus

Classificação Científica

CORDIS: Ciências Físicas

Projetos Associados

ALBATTS - Alliance for Batteries, Training and Skills

LAETA2023 - Programático - ET - Emerging Technologies - LAETA2023 - Programático - ET - Emerging Technologies

CAVALI - Cadeia de Valor do Lítio - CAVALI - Cadeia de Valor do Lítio

RedoxMOFs - Redox-active Metal-Organic Frameworks as Electrode Materials for Lithium-Ion Batteries

MatER - MatER - Materials for Energy Research Group

Outras Informações

ID Authenticus: P-00X-N1G

DOI: 10.1002/adfm.202212344

Abstract (EN): The advent of new solid-state energy storage devices to tackle the electrical revolution requires the usage of nonlinear behavior leading to emergent phenomena. The ferroelectric analyzed herein belongs to a family of electrolytes that allow energy harvesting and storage as part of its self-charging features when thermally activated. The Na2.99Ba0.005ClO electrolyte shows quasi-adiabatic behavior with a continuous increase in polarization upon cycling, displaying almost no hysteresis. The maximum polarization obtained at a weak electric field is giant and similar to the remanent polarization. It depends on the temperature with a pyroelectric coefficient of 5.37 C m(-2) degrees C-1 from -5 to 46 degrees C. The emergence occurs via negative resistance and capacitance. The glass transition is found to have its origins in the sharp depolarization at 46 - 48 degrees C. Above -10 degrees C, at approximate to -5 degrees C, another thermal anomaly may rely on the topologic characteristics of the A(3-2x)Ba(x)ClO (A = Li, Na, K) glass electrolytes enabling positive feedback of the current of electrons throughout the surface of the inner cell. The phenomena may pave the way toward a better understanding of dipolar nanodomain fragile glasses with exceptional ferroelectric characteristics to architect energy harvesting and storage devices based on multivalent thermally activated Na+-ion-ion electrolytes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13