Effects of Eu3+ ions doping on physicochemical properties of spinel-structured lithium-titanium oxide (Li4Ti5O12) as an efficient photoluminescent material

Michalska, Monika; Lemański, K.; Ptak, Maciej; Roguska, Agata; Chernyayeva, Olga; Sikora, Andrzej; Gołębiewski, Przemysław; Szysiak, A.; Malinowska, A.; Małecka, Małgorzata A.

doi:10.1016/j.materresbull.2020.111084

Cited by 7 publications

(4 citation statements)

References 48 publications

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“…According to the literature, doping trivalent lanthanide ions (Ln 3+ ) with a lower valence state than Ti 4+ provokes oxygen vacancies in LTO, which enhance the electrochemical performance . Ln 3+ doping elements include La 3+ , , Ce 4+ , , Sm 3+ , Eu 3+ , , Gd 3+ , , and Dy 3+ . Wu and co-workers introduced lanthanide ions such as Gd 3+ and La 3+ as ionic charge carriers in the tetrahedral (8 a ) sites or in the octahedral sites of Ti 4+ octahedral (16d) sites creating vacancies of oxygen, which could improve not only the high-rate performance but also the long-term cycling stability by enhancing electronic conductivity of the electrode.…”

Section: Introductionmentioning

confidence: 99%

“…Even though the metal-ion doping in LTO is an effective strategy, only a small number of investigations have so far been documented in the literature on the electrochemical performance of lanthanide-doped LTO anodes. − Lanthanides, commonly referred to as rare-earth (RE) elements, are all transition metals sharing common properties. In their pure state, they show characteristics of brightness, metallic nature, and silvery appearance.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries

Lakshmi-Narayana

Dhananjaya

Julien

et al. 2023

ACS Appl. Mater. Interfaces

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A comprehensive and comparative exploration research performed, aiming to elucidate the fundamental mechanisms of rare-earth (RE) metal-ion doping into Li 4 Ti 5 O 12 (LTO), reveals the enhanced electrochemical performance of the nanocrystalline RE-LTO electrodes in high-power Li-ion batteries. Pristi ne Li 4 Ti 5 O 12 (LTO) and rare-earth metal-doped Li 4−x/3 Ti 5−2x/3 Ln x O 12 (RE-LTO with RE = Dy, Ce, Nd, Sm, and Eu; x ≈ 0.1) nanocrystalline anode materials were synthesized using a simple mechanochemical method and subsequent calcination at 850 °C. The X-ray diffraction (XRD) patterns of pristine and RE-LTO samples exhibit predominant (111) orientation along with other characteristic peaks corresponding to cubic spinel lattice. No evidence of RE-doping-induced changes was seen in the crystal structure and phase. The average crystallite size for pristine and RE-LTO samples varies in the range of 50−40 nm, confirming the formation of nanoscale crystalline materials and revealing the good efficiency of the ball-milling-assisted process adopted to synthesize nanoscale particles. Raman spectroscopic analyses of the chemical bonding indicate and further validate the phase structural quality in addition to corroborating with XRD data for the cubic spinel structure formation. Transmission electron microscopy (TEM) reveals that both pristine and RE-LTO particles have a similar cubic shape, but RE-LTO particles are better interconnected, which provide a high specific surface area for enhanced Li + -ion storage. The detailed electrochemical characterization confirms that the RE-LTO electrodes constitute promising anode materials for high-power Li-ion batteries. The RE-LTO electrodes deliver better discharge capacities (in the range of 172−198 mAh g −1 at 1C rate) than virgin LTO (168 mAh g −1 ). Among them, Eu-LTO provides the best discharge capacity of 198 mAh g −1 at a 1C rate. When cycled at a high current rate of 50C, all RE-LTO electrodes show nearly 70% of their initial discharge capacities, resulting in higher rate capability than virgin LTO (63%). The results discussed in this work unfold the fundamental mechanisms of RE doping into LTO and demonstrate the enhanced electrochemical performance derived via chemical composition tailoring in RE-LTO compounds for application in high-power Li-ion batteries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries

Lakshmi-Narayana

Dhananjaya

Julien

et al. 2023

ACS Appl. Mater. Interfaces

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“…However, the low theoretical capacity and poor conductivity of LTO limited the development of LTO as anode material for Lithium-ion batteries [15][16][17][18] . Up to now, ion doping of LTO was an effective way to improve the electrochemical performance of composite [19][20][21][22][23][24] . In this paper, SnO2 nanosheets were in situ formed on the surface of LTO nanoparticles by hydrothermal reaction, and the energy storage mechanism of LTO/SnO2 composite was studied.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Performance of Li4Ti5O12/SnO2 Composite as an Anode of Lithium-Ion Batteries

Wang

Fang

et al. 2022

SSP

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Li4Ti5O12/SnO2 composite with different SnO2 contents were prepared by hydrothermal method. SnO2 nanosheets were in situ formed on the surface of Li4Ti5O12 nanoparticles. At the same time, Sn ions were doped into the Li4Ti5O12 lattice, which effectively improved the conductivity of Li4Ti5O12. When the content of SnO2 was 8 %, the electrochemical performance of Li4Ti5O12/SnO2 composite was the best. The first discharge specific capacity was 480.54 mAh/g. The capacity remained at 276.8 mAh/g after 200 cycles at 0.1 A/g, and the capacity retention was as high as 87.4% (compared with the 10th cycle).

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“…Moreover, a flat discharge profile at 1.55 V (vs. Li + /Li) demonstrates that it avoids the formation of SEI film. However, the LTO is a large bandgap (3.54 eV) semiconductor, in which the electrons are transferred from the 3d state of Ti to the 2p states of O, which leads to low electrical conductivity (10 −13 -10 −9 S cm −1 ) and limits the electrochemical activity [13][14][15][16]. Several Micro 2021, 1 29 innovative methodologies have been used to solve these challenges, such as the preparation of nano-sized particles, surface coating or composing with carbon materials, doping with metallic elements, etc.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Performance of Li4Ti5O12 by Niobium Doping for Pseudocapacitive Applications

Chandrasekhar

Dhananjaya

Hussain

et al. 2021

Micro

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Niobium-doped nanocrystalline Li4Ti5O12 (LTO) is synthesized by the solid-state reaction method, and the influence of dopant concentration (x = 2–10 mol%) on microstructural and electrochemical properties is studied. The X-ray diffraction and Raman patterns assessed the cubic spinel structure of Li4Ti5−xNbxO12 phase in all samples. Marginal changes in the lattice parameters, unit cell volume and dislocation density of LTO are observed with Nb substitution. The higher ionic radius of Nb induces a lattice expansion, which may be favorable for more ion intercalation/deintercalation. The SEM and TEM images display uniformly distributed nano-sized cubical particles. The represented (hkl) orientations of the SAED pattern and d-spacing (0.46 nm) between bright fringes confirm the well-crystallized LTO phase. The EDS and elemental mapping results demonstrate that Nb elements are uniformly doped in LTO with a proper stoichiometric ratio. The optimized 8%Nb-doped LTO electrode exhibits pseudocapacitive behavior and delivers a high specific capacitance of 497 F g−1 at a current density of 1 A g−1 with 92.3% of specific capacitance retention even after 5000 cycles.

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Effects of Eu3+ ions doping on physicochemical properties of spinel-structured lithium-titanium oxide (Li4Ti5O12) as an efficient photoluminescent material

Cited by 7 publications

References 48 publications

Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries

Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries

Preparation and Electrochemical Performance of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/SnO<sub>2</sub> Composite as an Anode of Lithium-Ion Batteries

Enhanced Electrochemical Performance of Li4Ti5O12 by Niobium Doping for Pseudocapacitive Applications

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Effects of Eu3+ ions doping on physicochemical properties of spinel-structured lithium-titanium oxide (Li4Ti5O12) as an efficient photoluminescent material

Cited by 7 publications

References 48 publications

Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li4Ti5O12Electrodes in High-Power Li-Ion Batteries

Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li4Ti5O12Electrodes in High-Power Li-Ion Batteries

Preparation and Electrochemical Performance of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/SnO<sub>2</sub> Composite as an Anode of Lithium-Ion Batteries

Enhanced Electrochemical Performance of Li4Ti5O12 by Niobium Doping for Pseudocapacitive Applications

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Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries

Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries