abstract
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.
keywords
DIFFERENTIAL SCANNING CALORIMETRY; LEAD MAGNESIUM NIOBATE; RENEWABLE ENERGY; RELAXOR FERROELECTRICS; DIELECTRIC RESPONSE; GATE DIELECTRICS; BEHAVIOR; PERFORMANCE; RELAXATION; POLYMERS
subject category
Chemistry; Science & Technology - Other Topics; Materials Science; Physics
authors
Baptista, MC; Khalifa, H; Araujo, A; Maia, BA; Souto, M; Braga, MH
our authors
Manuel Souto Salom
Invited Assistant ProfessorProjects
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
Redox-active Metal-Organic Frameworks as Electrode Materials for Lithium-Ion Batteries (RedoxMOFs)
acknowledgements
M.H.B. acknowledges Professor John B. Goodenough's endowment to the MatER - Materials for Energy Research lab, FEUP. The authors thank Rosario Soares for assistance with PXRD measurements. This work was supported by the CAVALI project, with reference POCI-01-0247-FEDER-047728, co-funded by the ERDF, through the COMPETE 2020, under the PORTUGAL 2020 Partnership Agreement; the Portuguese Foundation for Science and Technology FCT UIDP/50 022/2020 Emerging Technologies - LAETA and PTDC/QUI-ELT/2593/2021 "Redox-active Metal-Organic Frameworks as Electrode Materials for Lithium-Ion Batteries" projects, the ALBATTS ERASMUS+ 612675-EPP-1-2019-1-SE-EPPKA2-SSA-B co-funded by the Erasmus Program of the European Union and FLY.PT-Mobilize the Portuguese aviation industry to disrupt the future urban air transport project, co-funded by the ERDF through Portugal 2020. This work has also received funding from the European Research Council (ERC) under the European Union's Horizon Europe Framework Programme, ERC-2021-Starting Grant, grant agreement no. 101039748-ELECTROCOFS.