Li 3.9 Cu 0.1 Ti 5 O 12 /CNTs composite for the anode of high-power lithium-ion batteries: Intrinsic and extrinsic effects

Lin, Chunfu; Song, Shufeng; Lai, M.O.; Li, Lü

doi:10.1016/j.electacta.2014.07.122

Cited by 17 publications

(2 citation statements)

References 33 publications

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“…Additionally, the introduction of alien ions into the lattice usually leads to reduced crystallinity . Therefore, simultaneous improvements on both Li + ion and electronic conduction could significantly enhance the fast charging–discharging ability of LTO. − …”

Section: Introductionmentioning

confidence: 99%

Chromium-Modified Li₄Ti₅O₁₂ with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Zou

Liang

Feng

et al. 2016

ACS Appl. Mater. Interfaces

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Bulk doping, surface coating, and size reducing are three strategies for improving the electrochemical properties of Li4Ti5O12 (LTO). In this work, chromium (Cr)-modified LTO with a synergistic effect of bulk doping, surface coating, and size reducing is synthesized by a facile sol-gel method. X-ray diffraction (XRD) and Raman analysis prove that Cr dopes into the LTO bulk lattice, which effectively inhibits the generation of TiO2 impurities. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) verifies the surface coating of Li2CrO4 on the LTO surface, which decreases impedance of the LTO electrode. More importantly, the size of LTO particles can be significantly reduced from submicroscale to nanoscale as a result of the protection of the Li2CrO4 surface layer and the suppression from Cr atoms on the long-range order in the LTO lattice. As anode material, Li4-xCr3xTi5-2xO12 (x = 0.1) delivers a reversible capacity of 141 mAh g(-1) at 10 °C, and over 155 mAh g(-1) at 1 °C after 1000 cycles. Therefore, the Cr-modified Li4Ti5O12 prepared via a sol-gel method has potential for applications in high-power, long-life lithium-ion batteries.

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Section: Introductionmentioning

confidence: 99%

Chromium-Modified Li₄Ti₅O₁₂ with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Zou

Liang

Feng

et al. 2016

ACS Appl. Mater. Interfaces

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“…Lao can be improved remarkably, and it also exhibits a relatively good cycling stability and rate performance . Furthermore, dopings of various cations, such as K + , Na + , Mg 2+ , Ca 2+ , Cu 2+ , Sn 2+ , Zn 2+ , La 3+ and Al 3+ , − are proved to be an effective way to improve the electrochemical performance of Li 4 Ti 5 O 12 . However, to the best of our knowledge, no study about metal ions doped BaLi 2 Ti 6 O 14 as an anode material has been reported.…”

Section: Introductionmentioning

confidence: 99%

Advanced BaLi₂Ti₆O₁₄ Anode Fabricated via Lithium Site Substitution by Magnesium

Lin

Qian

et al. 2016

ACS Sustainable Chem. Eng.

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Advanced Na- and Mg-doped BaLi2Ti6O14 anodes in the form of BaLi1.9M0.1Ti6O14 (M = Na, Mg) are successfully fabricated and evaluated as lithium storage materials for rechargeable lithium-ion batteries. The effects of Na- and Mg-dopings on the crystal structure, surface morphology and electrochemical behavior are investigated for BaLi2Ti6O14. The results show that both Na and Mg elements are successfully introduced into the Li site, and they do not alter the basic structure of BaLi2Ti6O14. The resulting BaLi1.9M0.1Ti6O14 (M = Na, Mg) exhibit significant improvements on the electrochemical performance in terms of the rate capability and cycle performance. Especially for BaLi1.9Mg0.1Ti6O14, it can deliver an initial charge capacity of 111.7 mAh g–1 at 5C. After 200 cycles, it still can maintain a reversible capacity of 90.1 mAh g–1 with the capacity retention of 80.7%. The enhanced electrochemical properties can be attributed to the reduced particle size, decreased charge transfer resistance and enhanced ionic/electronic conductivity induced by Mg doping. Besides, in situ X-ray diffraction also reveals that BaLi1.9Mg0.1Ti6O14 has high structural stability and reversibility during charge/discharge process.

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Challenges of Spinel Li₄Ti₅O₁₂ for Lithium‐Ion Battery Industrial Applications

Yuan

Tan

et al. 2017

Advanced Energy Materials

328

233

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Li 3.9 Cu 0.1 Ti 5 O 12 /CNTs composite for the anode of high-power lithium-ion batteries: Intrinsic and extrinsic effects

Cited by 17 publications

References 33 publications

Chromium-Modified Li₄Ti₅O₁₂ with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Chromium-Modified Li₄Ti₅O₁₂ with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Advanced BaLi₂Ti₆O₁₄ Anode Fabricated via Lithium Site Substitution by Magnesium

Challenges of Spinel Li₄Ti₅O₁₂ for Lithium‐Ion Battery Industrial Applications

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Li 3.9 Cu 0.1 Ti 5 O 12 /CNTs composite for the anode of high-power lithium-ion batteries: Intrinsic and extrinsic effects

Cited by 17 publications

References 33 publications

Chromium-Modified Li4Ti5O12 with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Chromium-Modified Li4Ti5O12 with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Advanced BaLi2Ti6O14 Anode Fabricated via Lithium Site Substitution by Magnesium

Challenges of Spinel Li4Ti5O12 for Lithium‐Ion Battery Industrial Applications

Contact Info

Product

Resources

About

Chromium-Modified Li₄Ti₅O₁₂ with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Chromium-Modified Li₄Ti₅O₁₂ with a Synergistic Effect of Bulk Doping, Surface Coating, and Size Reducing

Advanced BaLi₂Ti₆O₁₄ Anode Fabricated via Lithium Site Substitution by Magnesium

Challenges of Spinel Li₄Ti₅O₁₂ for Lithium‐Ion Battery Industrial Applications