Probing the Physicochemical Behavior of Variously Doped Li 4 Ti 5 O 12 Nanoflowers.

Autor:	Salvatore KL; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States., Vila MN; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States., Renderos G; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States., Li W; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States., Housel LM; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States.; Interdisciplinary Science Department, Brookhaven National Laboratory, Building 734, Upton, New York 11973, United States., Tong X; Center for Functional Nanomaterials, Brookhaven National Laboratory, Building 735, Upton, New York 11973, United States.; Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794-2275, United States., McGuire SC; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States., Gan J; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States., Paltis A; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States., Lee K; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States., Takeuchi KJ; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States.; Interdisciplinary Science Department, Brookhaven National Laboratory, Building 734, Upton, New York 11973, United States., Marschilok AC; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States.; Interdisciplinary Science Department, Brookhaven National Laboratory, Building 734, Upton, New York 11973, United States., Takeuchi ES; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.; Institute for Electrochemically Stored Energy, State University of New York at Stony Brook, Stony Brook, New York 11794, United States.; Interdisciplinary Science Department, Brookhaven National Laboratory, Building 734, Upton, New York 11973, United States.; Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794-2275, United States., Wong SS; Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States.
Jazyk:	angličtina
Zdroj:	ACS physical chemistry Au [ACS Phys Chem Au] 2022 Apr 18; Vol. 2 (4), pp. 331-345. Date of Electronic Publication: 2022 Apr 18 (Print Publication: 2022).
DOI:	10.1021/acsphyschemau.1c00044
Abstrakt:	This study thoroughly investigated the synthesis of not only 4 triply-doped metal oxides but also 5 singly-doped analogues of Li 4 Ti 5 O 12 for electrochemical applications. In terms of synthetic novelty, the triply-doped materials were fabricated using a relatively facile hydrothermal method for the first-time, involving the simultaneous substitution of Ca for the Li site, Ln (i.e., Dy, Y, or Gd) for the Ti site, and Cl for the O site. Based on XRD, SEM, and HRTEM-EDS measurements, the resulting materials, incorporating a relatively homogeneous and uniform dispersion of both the single and triple dopants, exhibited a micron-scale flower-like morphology that remained apparently undamaged by the doping process. Crucially, the surface chemistry of all of the samples was probed using XPS in order to analyze any nuanced changes associated with either the various different lanthanide dopants or the identity of the metal precursor types involved. In the latter case, it was observed that the use of a nitrate salt precursor versus that of a chloride salt enabled not only a higher lanthanide incorporation but also the potential for favorable N-doping, all of which promoted a concomitant increase in conductivity due to a perceptible increase in Ti 3+ content. In terms of the choice of lanthanide system, it was observed via CV analysis that dopant incorporation generally (albeit with some notable exceptions, especially with Y-based materials) led to the formation of higher amounts of Ti 3+ species within both the singly and triply-doped materials, which consequentially led to the potential for increased diffusivity and higher mobility of Li + species with the possibility for enabling greater capacity within these classes of metal oxides. Competing Interests: The authors declare no competing financial interest. (© 2022 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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