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Vezzù K, García-González E, Pagot G, Urones-Garrote E, Sotomayor ME, Varez A, Di Noto V. Effect of Relaxations on the Conductivity of La 1/2+1/2x Li 1/2-1/2x Ti 1-x Al x O 3 Fast Ion Conductors. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:5484-5499. [PMID: 35782208 PMCID: PMC9245440 DOI: 10.1021/acs.chemmater.2c00459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Perovskite-type solid-state electrolytes, Li3x La2/3-x TiO3 (LLTO), are considered among the most promising candidates for the development of all-solid-state batteries based on lithium metal. Their high bulk ionic conductivity can be modulated by substituting part of the atoms hosted in the A- or B-site of the LLTO structure. In this work, we investigate the crystal structure and the long-range charge migration processes characterizing a family of perovskites with the general formula La1/2+1/2x Li1/2-1/2x Ti1-x Al x O3 (0 ≤ x ≤ 0.6), in which the charge balance and the nominal A-site vacancies (n A = 0) are preserved. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) investigations reveal the presence of a very complex nanostructure constituted by a mixture of two different ordered nanoregions of tetragonal P4/mmm and rhombohedral R3̅c symmetries. Broadband electrical spectroscopy studies confirm the presence of different crystalline domains and demonstrate that the structural fluctuations of the BO6 octahedra require to be intra- and intercell coupled, to enable the long-range diffusion of the lithium cation, in a similar way to the segmental mode that takes place in polymer-ion conductors. These hypotheses are corroborated by density functional theory (DFT) calculations and molecular dynamic simulations.
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Affiliation(s)
- Keti Vezzù
- Section
of Chemistry for the Technology (ChemTech), Department of Industrial
Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
| | - Ester García-González
- Departamento
de Química Inorgánica. Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
| | - Gioele Pagot
- Section
of Chemistry for the Technology (ChemTech), Department of Industrial
Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
- Centro
Studi di Economia e Tecnica dell’Energia Giorgio Levi Cases, Via Marzolo 9, I-35131 Padova (PD), Italy
| | - Esteban Urones-Garrote
- Centro
Nacional de Microscopia electrónica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
| | - Maria Eugenia Sotomayor
- Materials
Science and Engineering Department, University
Carlos III of Madrid, Av. de la Universidad 30, Leganés, Madrid E-28911, Spain
| | - Alejandro Varez
- Materials
Science and Engineering Department, University
Carlos III of Madrid, Av. de la Universidad 30, Leganés, Madrid E-28911, Spain
| | - Vito Di Noto
- Section
of Chemistry for the Technology (ChemTech), Department of Industrial
Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
- Centro
Studi di Economia e Tecnica dell’Energia Giorgio Levi Cases, Via Marzolo 9, I-35131 Padova (PD), Italy
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Alvi AR, Vezzù K, Pagot G, Sgarbossa P, Pace G, Di Noto V. Inorganic‐Organic Hybrid Anion Conducting Membranes Based on Ammonium‐Functionalized Polyethylene Pyrrole‐Polyethylene Ketone Copolymer. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202100409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Afaaf Rahat Alvi
- Department of Industrial Engineering University of Padova via Marzolo 9 Padova 35131 Italy
| | - Keti Vezzù
- Department of Industrial Engineering University of Padova via Marzolo 9 Padova 35131 Italy
| | - Gioele Pagot
- Department of Industrial Engineering University of Padova via Marzolo 9 Padova 35131 Italy
| | - Paolo Sgarbossa
- Department of Industrial Engineering University of Padova via Marzolo 9 Padova 35131 Italy
| | - Giuseppe Pace
- Institute of Condensed Matter Chemistry and Technologies for Energy National Research Council via Marzolo 1 Padova 35131 Italy
| | - Vito Di Noto
- Department of Industrial Engineering University of Padova via Marzolo 9 Padova 35131 Italy
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Du C, Cheung CS, Zheng H, Li D, Du W, Gao H, Liang G, Gao H. Bathochromic-Shifted Emissions by Postfunctionalization of Nonconjugated Polyketones. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59288-59297. [PMID: 34856800 DOI: 10.1021/acsami.1c18822] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Most nontraditional intrinsic luminescent (NTIL) polymers currently show blue fluorescence. Tuning the emission color of NTIL polymers is of fundamental importance for their applications, but it still remains a scientific challenge. Herein, we initially develop an efficient strategy for bathochromic shifting of NTIL polymers by through-space acceptor-donor charge transfer between the in chain and the side chain. A variety of functionalized polyketones (FPK-R; where R = H, Ph, Me, tBu, F, and Cl) with furan rings built into the polymer chain were prepared by the Paal-Knorr reaction. FPK-R polymers showed bright and bathochromic-shifted fluorescence compared with their counterparts. The emission color could be tuned by changing the postfunctionalization conversion and varying the styrenic monomer substituent. Experimental and theoretical investigations revealed that the color tunability originated from enhanced through-space charge transfer between the side chain phenyl and the in chain furan rings.
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Affiliation(s)
- Cheng Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518035, China
| | - Chi Shing Cheung
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Donghui Li
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Wenbo Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Heng Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Guodong Liang
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
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