Carbon-coated TiNb<sub>2</sub>O<sub>7</sub> nanosheet arrays as self-supported high mass-loading anodes for flexible Li-ion batteries

Zhou, Jinquan; Dong, Haoyang; Chen, Yao; Ye, Yihua; Liang, Xiao; Deng, Bohua; Liu, Jinping

doi:10.1039/d0cc08251a

Cited by 12 publications

(6 citation statements)

References 29 publications

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“…Also, the dispersed bright spots in the electron diffraction of the selected regions indicate that the nanosheets are monocrystalline (inset). 35 Moreover, an amorphous layer of 1−2 nm is uniformly wrapped around the outer edge position. In Figure 1c−e, energy-dispersive X-ray spectroscopy reveals that Nb, Ti, and O elements are equally distributed on the surface of PTNO.…”

Section: Morphology and Structure Analysismentioning

confidence: 99%

Plasma-Induced Defect Engineering in TiNb₂O₇ for Boosting Lithium-Ion Diffusion

Sun,

Qin,

Sun

et al. 2024

Energy Fuels

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The development of a high-performance anode is critical for the design of ultrahigh-capacity lithium-ion batteries to participate in next-generation energy-storage devices. However, the delocalization transition and sluggish reaction kinetics during TiNb 2 O 7 (TNO) relithiation lead to its low rate performance and rapid capacity decay. In this work, the ball-milling method and plasma technology are used to construct TNO nanocomposites in which defect-rich TNO particles are tightly encapsulated by an amorphous layer. Through structural characterization, electrochemical behavior tests, and kinetic calculations, the increase of oxygen vacancies and other defects can optimize the electronic structure and achieve rapid electron transport and ion migration, and the dense amorphous layer can inhibit the internal stress and volume expansion of the electrode during cycling. As a result, the optimized PTNO anode has excellent lithium storage capacity with a high capacity of 347.9 mA•h•g −1 at 0.1C, a high rate performance of 57.5 mA•h•g −1 at 30C, and an excellent stability of 1000 cycles at 10C. This study provides a new perspective on the design of interface engineering to achieve highly reversible and durable secondary battery anodes.

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Section: Morphology and Structure Analysismentioning

confidence: 99%

Plasma-Induced Defect Engineering in TiNb₂O₇ for Boosting Lithium-Ion Diffusion

Sun,

Qin,

Sun

et al. 2024

Energy Fuels

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“…In order to relieve the issues suffered by bulk TiNb 2 O 7 , various strategies have been tried, such as introducing an oxygen vacancy, − regulating the morphology, ,− doping with alien ions, − etc. Oxygen vacancy is an intrinsic defect which can trigger lattice distortion and electron concentration improvement .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Cai

et al. 2023

ACS Sustainable Chem. Eng.

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The use of TiNb2O7 (TNO) as an anode material for Li-ion battery is attracting tremendous attention because of its stable structure and high theoretical capacity. However, the inherent poor electronic conductivity and ionic conductivity restrict its practical application. Herein, we designed and prepared zirconium-doped TiNb2O7 nanospheres (Zr x -TNO NSs, x = 0, 0.05, 0.010) with pores through a simple hydrolysis method to adjust the lattice spacing and electron distribution. The nanosphere-structured electron materials with pores can not only prevent aggregation of active materials but also provide more channels for Li+ and electrons’ transportation. Meanwhile, X-ray diffraction coupled with high-resolution transmission electron microscopy results verified the crystal spacing increasement. The X-ray photoelectron spectrum exhibited partial reduction of metal atoms. As a result, Zr0.05-TNO NSs showed improved cycling stability in the half cell (i.e., delivers a reversible capacity of 170 mA h/g at 5 C after 1000 cycles). It also showed excellent performance in the rate capabilities of 260.0 and 177.8 mA h/g at 0.5 and 10 C, making it highly competitive for quick-charging lithium-ion batteries.

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“…25 Moreover, carbon-coated nano-sheet arrays are also used to increase the electrical conductivity of TNO. 26 However, carbon coating has still some problems regarding the longtime performance of the batteries. Therefore, there is a need to find a stable inorganic coating to enhance the performance and stability of TiNb 2 O 7 .…”

Section: Introductionmentioning

confidence: 99%

“…To increase the conductivity of TiNb 2 O 7, researchers have reported a novel surface modification process and carbon‐coated TiNb 2 O 7 25 . Moreover, carbon‐coated nano‐sheet arrays are also used to increase the electrical conductivity of TNO 26 . However, carbon coating has still some problems regarding the long‐time performance of the batteries.…”

Section: Introductionmentioning

confidence: 99%

Preparation, structural, and characterizations of SnO₂‐coated TiNb₂O₇ anode materials for lithium‐ion batteries

Liang

Gupta

et al. 2022

J Am Ceram Soc.

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SnO 2 -coated TiNb 2 O 7 powders were synthesized via the solution coating method in the present research. The SnO 2 layers with a thickness of 3-5 nm were homogeneously coated on the surface of TiNb 2 O 7 particles. TiNb 2 O 7 coated with SnO 2 of 5 mol% with high Li + diffusion coefficient delivered the discharge capacity of 319.5 mAh/g, which was 6.6% higher than that of the non-coated samples. The enhancement of capacity for the coated TiNb 2 O 7 was owing to the low chargetransfer resistance of 17.5 Ω in contrary to the non-coated TiNb 2 O 7 (27.8 Ω).SnO 2 -coated TiNb 2 O 7 possessed an improved capacity retention of 85.2% at 5 C after 100 cycles, superior to the non-coated TiNb 2 O 7 (79.8%). On the other hand, the excessive amounts of SnO 2 coating led to the reduction in the capacity of the prepared samples. The excessive amounts of SnO 2 layers suppressed the Li + diffusion and increased the charge-transfer resistance. The obtained results in this study indicated that coating of TiNb 2 O 7 with appropriate amounts of SnO 2 significantly improved the electrochemical performance of TiNb 2 O 7 .

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Carbon-coated TiNb₂O₇ nanosheet arrays as self-supported high mass-loading anodes for flexible Li-ion batteries

Abstract: A TiNb2O7 anode material distributed in carbon-coated nanosheet arrays on carbon cloth is prepared by a facile method, and it is combined with LiNi0.5Mn1.5O4 to assemble full batteries with an improved energy density at high rates.

Cited by 12 publications

References 29 publications

Plasma-Induced Defect Engineering in TiNb₂O₇ for Boosting Lithium-Ion Diffusion

Plasma-Induced Defect Engineering in TiNb₂O₇ for Boosting Lithium-Ion Diffusion

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Preparation, structural, and characterizations of SnO₂‐coated TiNb₂O₇ anode materials for lithium‐ion batteries

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Carbon-coated TiNb2O7 nanosheet arrays as self-supported high mass-loading anodes for flexible Li-ion batteries

Abstract: A TiNb2O7 anode material distributed in carbon-coated nanosheet arrays on carbon cloth is prepared by a facile method, and it is combined with LiNi0.5Mn1.5O4 to assemble full batteries with an improved energy density at high rates.

Cited by 12 publications

References 29 publications

Plasma-Induced Defect Engineering in TiNb2O7 for Boosting Lithium-Ion Diffusion

Plasma-Induced Defect Engineering in TiNb2O7 for Boosting Lithium-Ion Diffusion

Enhanced Energy Storage Performance of Zr-Doped TiNb2O7 Nanospheres Prepared by the Hydrolytic Method

Preparation, structural, and characterizations of SnO2‐coated TiNb2O7 anode materials for lithium‐ion batteries

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Product

Resources

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Carbon-coated TiNb₂O₇ nanosheet arrays as self-supported high mass-loading anodes for flexible Li-ion batteries

Plasma-Induced Defect Engineering in TiNb₂O₇ for Boosting Lithium-Ion Diffusion

Plasma-Induced Defect Engineering in TiNb₂O₇ for Boosting Lithium-Ion Diffusion

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Preparation, structural, and characterizations of SnO₂‐coated TiNb₂O₇ anode materials for lithium‐ion batteries