Improved rate capability and cycling stability of novel terbium-doped lithium titanate for lithium-ion batteries

Zhang, Ping; Huang, Yudai; Jia, Wei; Cai, Yanfei; Wang, Xingchao; Guo, Yong; Jia, Dianzeng; Sun, Zhipeng; Guo, Zaiping

doi:10.1016/j.electacta.2016.06.017

Cited by 22 publications

(11 citation statements)

References 43 publications

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“…25,26,28,29 Interestingly, the materials show excellent Li + ion diffusion kinetics when oxygen vacancy exists. 25,30 The terbium-doped LTO shows improved rate capability. 30 The europiummodified oxygen vacancy LTO shows super high rate and excellent electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Liu

Huang

Cai

et al. 2021

ACS Appl. Mater. Interfaces

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Boosting sufficient Li + ion mobility in Li 4 Ti 5 O 12 (LTO) is crucial for high-rate performance lithium storage. Here, an ultrafast charge storage oxygen vacancy two-dimensional (2D) LTO nanosheet was successfully fabricated through a one-pot hydrothermal method. The selectively doped Al 3+ into octahedron Li + /Ti 4+ 16d sites not only provide bulk oxygen vacancy and appropriate distorted TiO 6 octahedra to facilitate Li + ions diffusion, but also serve as a "pillar" to stabilize the Ti−O framework. The oxygen vacancy lowers Li + ion diffusion energy barrier. Moreover, the 2D structure provides open diffusion channels for fast Li + ion transport. As a result, the sample shows excellent electrochemical performance for bifunctional lithium storage. As a lithium-ion battery anode, the capacity retention reaches 112.8 mA h g −1 after 5000 cycles at 40 C with a fading rate of 0.288% per 100 cycles. Meanwhile, as a lithium-ion capacitor anode, it exhibits an excellent rate capacity of 120 mA h g −1 after 5000 cycles at 500 C with nearly 100% Coulombic efficiency. The produced LTO shows much higher rate capacity and longer lifetime than the reported LTO. Density functional theory calculations also demonstrate that oxygen vacancy can facilitate Li + ion diffusion kinetics. The relationship between oxygen vacancy content and Li + ions diffusion energy barrier in LTO is quantified. This work pioneers a defect engineering strategy for synthesized high-performance electrode materials.

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Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Liu

Huang

Cai

et al. 2021

ACS Appl. Mater. Interfaces

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“… 12 – 15 As an important kind of dopant in LIB electrodes, lanthanide ions can significantly enhance both the capacity and rate performance of the electrodes. 16 – 18 Even a trace amount of lanthanide introduction would lead to a great enhancement of specific capacity as well as rate performance of LIBs. This inspired us to transplant such a doping strategy from LIBs to SIBs.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide doping induced electrochemical enhancement of Na₂Ti₃O₇ anodes for sodium-ion batteries

et al. 2018

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“…Li + ionic conductivity could be reflected by Li-ion diffusion coefficient ( D , cm 2 s –1 ), as depicted in eqs and . where T is the absolute temperature (298 K), A is the area of electrode surface (1.54 cm 2 ), F is the Faraday constant (96485 C mol –1 ), C is the molar concentration of Li + (4.37 × 10 –3 mol cm –3 ), and σ is the Warburg impedance coefficient (the slope of eq as displayed in Figure d).…”

Section: Resultsmentioning

confidence: 99%

“…where T is the absolute temperature (298 K), A is the area of electrode surface (1.54 cm 2 ), F is the Faraday constant (96485 C mol −1 ), C is the molar concentration of Li + (4.37 × 10 −3 mol cm −3 ), 48 and σ is the Warburg impedance coefficient (the slope of eq 2 as displayed in Figure 9d). Calculated from eqs 1 and 2, the D values are 7.8 × 10 −13 , 5.8 × 10 −13 , 1.2 × 10 −11 , and 3.2 × 10 −12 cm 2 s −1 for LTO, LTO/ LATP1, LTO/LATP2, and LTO/LATP3, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Li_1.3Al_0.3Ti_1.7(PO₄)₃ Behaving as a Fast Ionic Conductor and Bridge to Boost the Electrochemical Performance of Li₄Ti₅O₁₂

Han

Zhang

Wang

et al. 2018

ACS Sustainable Chem. Eng.

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is a Li-ion conductive solid electrolyte with high ionic conductivity; meanwhile, it also possesses relatively high electronic conductivity compared to those of the other fast ionic conductors. In this work, LATP was composited with Li 4 Ti 5 O 12 (LTO) at a mass ratio of 0.026 and calcined at 700 °C for 5 h. The composite delivers reversible capacities of 164.8, 156.3, 152.4, 146.5, 130.5, and 158.6 mAh g −1 at the current densities of 100, 200, 400, 800, 1600, and 100 mA g −1 , respectively, as well as a capacity of 112 mAh g −1 after cycling at 500 mA g −1 for 1200 cycles. The appreciable performance is attributable to the threedimensional Li-ion diffusion channels in LATP to facilitate Li-ion migration, and the local charge imbalance resulted from the substitution of Al 3+ for Ti 4+ to promote charge transfer in LTO, thus the LATP-composited LTO exhibits enhanced ionic and electronic conductivities, as well as the markedly boosted electrochemical performance.

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Improved rate capability and cycling stability of novel terbium-doped lithium titanate for lithium-ion batteries

Cited by 22 publications

References 43 publications

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Lanthanide doping induced electrochemical enhancement of Na₂Ti₃O₇ anodes for sodium-ion batteries

Li_1.3Al_0.3Ti_1.7(PO₄)₃ Behaving as a Fast Ionic Conductor and Bridge to Boost the Electrochemical Performance of Li₄Ti₅O₁₂

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Improved rate capability and cycling stability of novel terbium-doped lithium titanate for lithium-ion batteries

Cited by 22 publications

References 43 publications

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Lanthanide doping induced electrochemical enhancement of Na2Ti3O7 anodes for sodium-ion batteries

Li1.3Al0.3Ti1.7(PO4)3 Behaving as a Fast Ionic Conductor and Bridge to Boost the Electrochemical Performance of Li4Ti5O12

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Lanthanide doping induced electrochemical enhancement of Na₂Ti₃O₇ anodes for sodium-ion batteries

Li_1.3Al_0.3Ti_1.7(PO₄)₃ Behaving as a Fast Ionic Conductor and Bridge to Boost the Electrochemical Performance of Li₄Ti₅O₁₂