Effective Strategy to Achieve Excellent Energy Storage Properties in Lead-Free BaTiO 3 -Based Bulk Ceramics
Rattachement africain : cn, us, jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Although extensive studies have been done on lead-free dielectric ceramics to achieve excellent dielectric behaviors and good energy storage performance, the major problem of low energy density has not been solved so far. Here, we report on designing the crossover relaxor ferroelectrics (CRFE), a crossover region between the normal ferroelectrics and relaxor ferroelectrics, as a solution to overcome the low energy density. CRFE exhibits smaller free energy and lower defect density in the modified Landau theory, which helps to obtain ultrahigh energy density and efficiency. The (1– x )Ba 0.65 Sr 0.35 TiO 3 – x Bi(Mg 2/3 Nb 1/3 )O 3 ((1– x )BST– x BMN) ( x = 0, 0.08, 0.1, 0.18, 0.2) ceramic was synthesized by a solid-state reaction method. The solid solutions exhibit dielectric frequency dispersion, which suggests typical relaxor characteristics with the increasing BMN content. The crossover ferroelectrics of 0.9BST–0.1BMN ceramic possesses a high energy storage efficiency (η) of 85.71%, a high energy storage density ( W ) of 3.90 J/cm 3, and an ultrahigh recoverable energy storage density ( W rec ) of 3.34 J/cm 3 under a dielectric breakdown strength of 400 kV/cm and is superior to other lead-free BaTiO 3 (BT)-based energy storage ceramics. It also exhibits strong thermal stability in the temperature range from 25 to 150 °C under an electric field of 300 kV/cm, with the fluctuations below 3% and with the energy storage density and energy efficiency at about 2.8 J/cm 3 and 82.93%, respectively. The enhanced recoverable energy density and breakdown strength of BT-based materials with significantly high energy efficiency make it a promising candidate to meet the wide requirements for high power applications.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Effective Strategy to Achieve Excellent Energy Storage Properties in Lead-Free BaTiO <sub>3</sub> -Based Bulk Ceramics
- Date Crossref
- 12/06/2020
- Éditeur
- American Chemical Society (ACS)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Xi'an Technological University Shaanxi Province Key Laboratory of Thin Films Technology & Optical Test pays non établi dans la noticeUniversité ou école supérieure
-
MS Technology (United States) pays non établi dans la noticeEntreprise
-
Beijing Jiaotong University pays non établi dans la noticeUniversité ou école supérieure
-
Xi'an Jiaotong University Frontier Institute of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
-
National Institute for Materials Science Center for Function Materials pays non établi dans la noticeStructure de recherche
-
Key Laboratory of Luminescence and Optical Information Ministry of Education School of Science pays non établi dans la noticeUniversité ou école supérieure
-
School of Electronic Science and Engineering Electronic Materials Research Laboratory pays non établi dans la noticeUniversité ou école supérieure
Shaanxi Province Key Laboratory of Thin Films Technology & Optical Test — Xi'an Technological University, MS Technology (United States) et Beijing Jiaotong University, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.