In Situ Construction T-Nb2o5 Nanolayer on Porous Carbon Cloth as Binder-Free Anode for Lithium-Ion Battery with Long Cycle Life DOI
Xuxu Wang, Ying Bai,

Ruxiu He

и другие.

Опубликована: Янв. 1, 2024

Metastable orthorhombic niobium pentoxide (T-Nb2O5) with fast lithium storage capability and safe operating voltage are recognized as suitable anode material for high power density lithium-ion batteries (LIBs). While, the T-Nb2O5 also suffers from low electrical conductivity in practical applications. In this work, electrochemical performance of is enhanced by constructing a free-standing electrode introducing N-doped carbon substrate. The consisting network-structured Nb2O5 layer porous cloth (PCC) avoids use binders benefits electron transport. addition, introduction substrate beneficial to enhance electronic Nb2O5. When used LIBs, PCC@Nb2O5 demonstrates excellent long cycle life rate performance, specific capacity over 150 mAh g-1 after 3200 cycles at current 1000 mA g-1. This strategy electrodes provides new options obtaining high-performance electrodes.

Язык: Английский

Improving Li-Ion Anodes with Systematic Elemental Doping in Titanium Niobate DOI
J. Michael Sieffert,

Christopher J. Lang,

Sophia Frazzini

и другие.

Chemistry of Materials, Год журнала: 2024, Номер 36(11), С. 5709 - 5719

Опубликована: Май 20, 2024

Lithium-ion batteries for high-power applications have become an increasingly important area of development as these devices been used in implantable medical devices, where extreme safety and long lifetimes are essential. TiNb2O7 has emerged a promising candidate to replace the current industrial standard Li4Ti5O12 safe anode. In this study, we use combinatorial methods screen effects 52 different dopants (M) composition (TiNb2)0.98M0.06O7 with unique elemental dopants. The materials were studied high throughput by X-ray diffraction cyclic voltammetry reveal performance doped materials. Structural analysis revealed change lattice parameters dependent on substituent present, some extremely large able partially substitute into Several materials, particularly dopants, show excellent discharge capacities 326.7 mAh g–1 at room temperature, improvement over 20% undoped material despite moderate doping levels (2% metals). Many TNO samples extended cycling, especially 37 °C. dramatic improvements addition (most which electrochemically inactive) attributed distortions local structure improving Li diffusion paths, thereby enabling higher capacities, establish new design principle optimizing anodes.

Язык: Английский

Процитировано

7

Enhanced performance of Mo-doped TiNb2O7 anode material for lithium-ion batteries via KOH sub-molten salt synthesis DOI
Song Zhu,

Minghao Su,

Suyang Lu

и другие.

Applied Surface Science, Год журнала: 2024, Номер 669, С. 160507 - 160507

Опубликована: Июнь 12, 2024

Язык: Английский

Процитировано

7

TiNb2O7/RGO composites as anode materials for high-performance lithium-ion batteries DOI
Ye Qin, Hanqing Jiang,

Zeping Ma

и другие.

Materials Science and Engineering B, Год журнала: 2025, Номер 314, С. 118081 - 118081

Опубликована: Фев. 8, 2025

Язык: Английский

Процитировано

1

Oxygen vacancy modulated Ti2Nb10O29 anodes for high-rate lithium storage DOI
Qian Chen, Yutong Zhao,

Yao Dai

и другие.

Journal of Electroanalytical Chemistry, Год журнала: 2024, Номер 972, С. 118615 - 118615

Опубликована: Авг. 31, 2024

Язык: Английский

Процитировано

4

Fe3+-substitutional Doping of Nanostructured Single-crystal TiNb2O7 for Long-stable Cycling of Ultra-fast Charging Anodes DOI Creative Commons
Yu Fan, Bobby Miglani, Shuaishuai Yuan

и другие.

Nano Energy, Год журнала: 2024, Номер unknown, С. 110494 - 110494

Опубликована: Ноя. 1, 2024

Язык: Английский

Процитировано

4

Plasma-Induced Defect Engineering in TiNb2O7 for Boosting Lithium-Ion Diffusion DOI
Shangqi Sun,

Liguang Qin,

Yalin Sun

и другие.

Energy & Fuels, Год журнала: 2024, Номер 38(3), С. 2463 - 2471

Опубликована: Янв. 17, 2024

The development of a high-performance anode is critical for the design ultrahigh-capacity lithium-ion batteries to participate in next-generation energy-storage devices. However, delocalization transition and sluggish reaction kinetics during TiNb2O7 (TNO) relithiation lead its low rate performance rapid capacity decay. In this work, ball-milling method plasma technology are used construct TNO nanocomposites which defect-rich particles tightly encapsulated by an amorphous layer. Through structural characterization, electrochemical behavior tests, kinetic calculations, increase oxygen vacancies other defects can optimize electronic structure achieve electron transport ion migration, dense layer inhibit internal stress volume expansion electrode cycling. As result, optimized PTNO has excellent lithium storage with high 347.9 mA·h·g–1 at 0.1C, 57.5 30C, stability 1000 cycles 10C. This study provides new perspective on interface engineering highly reversible durable secondary battery anodes.

Язык: Английский

Процитировано

3

Single-crystal TiNb2O7 materials via sustainable synthesis for fast-charging lithium-ion battery anodes DOI Creative Commons
Yu Fan, Senhao Wang, Rana Yekani

и другие.

Journal of Energy Storage, Год журнала: 2024, Номер 95, С. 112482 - 112482

Опубликована: Июнь 14, 2024

Язык: Английский

Процитировано

3

Synergistic internal and external modification of TiNb2O7 through ion doping and interfacial engineering for high-performance lithium-ion batteries DOI
Fan Gao,

Shilun Yang,

Ziqiang Zhang

и другие.

Carbon, Год журнала: 2025, Номер unknown, С. 120217 - 120217

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0

Voltage Regulation via Covalent Bond Strength to Increase Energy Density for Safe Fast‐Charging Lithium‐Ion Batteries DOI

Jun Ge Huang,

Yang Qi, Weijia Yang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 14, 2025

Abstract Safe fast‐charging anodes with high operating voltage, such as Li 4 Ti 5 O 12 (≈1.55 V) and TiNb 2 7 (≈1.65 V), compromise the full‐cell output voltage (2.3 to ensure safety, limiting energy density. Lowering anode potential can effectively enhance density while maintaining safety; however, mechanisms behind require further exploration. Here, methods are proposed lower by enhancing M–L covalent bonding, achieved reducing coordination number, electron‐donating inductive effects, or utilizing pseudo‐Jahn–Teller effect distortion. Using LiLaTiO a model anode, distortion of TiO 6 octahedra is explored show how it adds covalency Ti–O bonds, lowing (≈0.3 V). Moreover, bulk exhibits excellent rate performance (181 mAh g −1 at 1 A , 122 10 ) good cycling stability (retention 73% after 6000 cycles ). NCM811//LiLaTiO full cell demonstrates exceptionally high‐power (118.4 C 95.6 20 C), achieving 3.6 V, 57% higher than 2.3 levels graphite‐LiFePO systems. These improvements attributed lithium storage sites low hopping barriers structure Ruddlesden–Popper perovskite, offering new insights for safe anodes.

Язык: Английский

Процитировано

0

Mechanisms for Improved Anode Performance in Titanium Niobate via Neodymium Doping DOI
J. Michael Sieffert, Zhenzhe Zhang, Ning Chen

и другие.

Chemistry of Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Язык: Английский

Процитировано

0