Self-assembled mesoporous Nb<sub>2</sub>O<sub>5</sub> as a high performance anode material for rechargeable lithium ion batteries

Venkatachalam, Praneash; Kesavan, Thangaian; Maduraiveeran, Govindhan; Kundu, Manab; Sasidharan, Manickam

doi:10.1088/2053-1591/aaf350

Cited by 10 publications

(8 citation statements)

References 40 publications

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“…19 Venkatachalam et al prepared the self-assembled mesoporous Nb 2 O 5 , which exhibited a high rate of lithium insertion ability. 20 Other nanostructures were also studied, such as 2D nanosheets, self-assembled nanosheets, and nanobelts 21−23 all of which showed good cycling and rate performance. The structure of Nb 2 O 5 /C nanocomposite is also another effective way to improve battery performance.…”

Section: Introductionmentioning

confidence: 99%

“…According to Sasidharan et al, the synthesized Nb 2 O 5 hollow nanospheres not only provided a capacity of 172 mAh g –1 after 250 cycles at 0.5 C but also still maintained a high capacity after cycling at 6.25 A g –1 . Venkatachalam et al prepared the self-assembled mesoporous Nb 2 O 5 , which exhibited a high rate of lithium insertion ability . Other nanostructures were also studied, such as 2D nanosheets, self-assembled nanosheets, and nanobelts − all of which showed good cycling and rate performance.…”

Section: Introductionmentioning

confidence: 99%

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Construction of a Flexible Nb₂O₅/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Kang

Zhang

Zhan

et al. 2020

ACS Appl. Energy Mater.

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Considering that Nb2O5 has good safety performance, high capacity, and rich redox couples (Nb5+/Nb4+ and Nb4+/Nb3+), it can be considered as a prospective anode material. However, the inherent poor conductivity of Nb2O5 and the structural damage caused by pulverization hinder their applications. Herein, we designed a flexible Nb2O5/carbon nanotube film (NCNTF) using Nb2O5-decorated carboxyl carbon nanotubes through a facile hydrothermal treatment and vacuum filtration process. Benefiting from its unique structural characteristics, the flexible composite film not only shortens the ions/electrons transmission paths, enhances conductivity, and structural stability but also relieves the large volume changes of Nb2O5 nanoparticles caused by Na+/Li+ insertion/extraction during charging and discharging. The binder-free NCNTF also has excellent electrochemistry storage performance based on simplifying the electrode preparation process. As for lithium-ion batteries, the NCNTF electrode delivers a specific capacity of 382 mAh g–1 after 100 cycles at 0.1 A g–1, and even at 1.0 A g–1, the capacity of 290 mAh g–1 can still be obtained. As for sodium-ion batteries, the NCNTF electrode shows a capacity of 220 mAh g–1 over the same number of cycles as above at 0.1 A g–1.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Construction of a Flexible Nb₂O₅/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Kang

Zhang

Zhan

et al. 2020

ACS Appl. Energy Mater.

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“…The predominant Li + -uptake and Li + -release peaks presented in Figure 4a are reported also for the cycling of Nb-based oxides [87] such as LiNbO 2 [88], porous crystalline LiNbO 3 [53], K x Li y NbO 3 [77], and niobium-oxide polymorphs [16,55,58,63,75,87,[116][117][118][119]. They were observed also for metal oxides such as iron oxide [120,121], cobalt oxide [121,122], titanium oxide [123], molybdenum oxide [124,125], and copper oxide [122].…”

Section: Potential Resolved LI + Uptake and Release During Voltammetr...mentioning

confidence: 62%

Lithium Niobate for Fast Cycling in Li-ion Batteries: Review and New Experimental Results

et al. 2023

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Li-Nb-O-based insertion layers between electrodes and electrolytes of Li-ion batteries (LIBs) are known to protect the electrodes and electrolytes from unwanted reactions and to enhance Li transport across interfaces. An improved operation of LIBs, including all-solid-state LIBs, is reached with Li-Nb-O-based insertion layers. This work reviews the suitability of polymorphic Li-Nb-O-based compounds (e.g., crystalline, amorphous, and mesoporous bulk materials and films produced by various methodologies) for LIB operation. The literature survey on the benefits of niobium-oxide-based materials for LIBs, and additional experimental results obtained from neutron scattering and electrochemical experiments on amorphous LiNbO3 films are the focus of the present work. Neutron reflectometry reveals a higher porosity in ion-beam sputtered amorphous LiNbO3 films (22% free volume) than in other metal oxide films such as amorphous LiAlO2 (8% free volume). The higher porosity explains the higher Li diffusivity reported in the literature for amorphous LiNbO3 films compared to other similar Li-metal oxides. The higher porosity is interpreted to be the reason for the better suitability of LiNbO3 compared to other metal oxides for improved LIB operation. New results are presented on gravimetric and volumetric capacity, potential-resolved Li+ uptake and release, pseudo-capacitive fractions, and Li diffusivities determined electrochemically during long-term cycling of LiNbO3 film electrodes with thicknesses between 14 and 150 nm. The films allow long-term cycling even for fast cycling with rates of 240C possessing reversible capacities as high as 600 mAhg−1. Electrochemical impedance spectroscopy (EIS) shows that the film atomic network is stable during cycling. The Li diffusivity estimated from the rate capability experiments is considerably lower than that obtained by EIS but coincides with that from secondary ion mass spectrometry. The mostly pseudo-capacitive behavior of the LiNbO3 films explains their ability of fast cycling. The results anticipate that amorphous LiNbO3 layers also contribute to the capacity of positive (LiNixMnyCozO2, NMC) and negative LIB electrode materials such as carbon and silicon. As an outlook, in addition to surface-engineering, the bulk-engineering of LIB electrodes may be possible with amorphous and porous LiNbO3 for fast cycling with high reversible capacity.

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“…In practice, various nanoarchitectures showed higher capacity after a larger number of charge-discharge cycling. [4][5][6][7][8][9][10][11] Focusing attention on spiky nanoarchitecture composed of numerous nanorods grown radially on a spherical core showed a high-rate capacity with improved durability of 131 mAh g À1 at 1 A g À1 after 1000 cycles. [12] The origin of high durability is the crystal orientation of nanorods and large spaces among surface nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Growth Mechanism of Spiky Nb₂O₅ Nanoparticles and their Electrochemical Property

Fuchigami

Yamamoto

Tanibata

et al. 2022

Physica Status Solidi (b)

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Spiky nanoarchitecture composed of numerous nanorods and a spherical core has applications in various fields because of its high performance and durability. However, controlling the spiky structure is challenging because of an unclear formation mechanism. This study investigates the growth mechanism of spiky nanostructure by hydrothermally synthesizing Nb2O5 with various conditions and additives, and it is shown that adsorption and gradual decomposition of ligands promote the formation of the spiky shape. Using oxalic acid as an additive and synthesizing at 160 °C, which is below oxalic acid's decomposition temperature, spherical Nb2O5 with a rough surface that consists of a nanostructure with less than 5 nm size forms, and its surface is protected by oxalate ions. When the synthesis temperature increases to 180 °C, oxalate ions are decomposed, and nanorods grow on the spherical particles. The results show that oxalate ions suppress particle growth, promote self‐assembly, and control subsequent particle growth, resulting in complex nanostructures. When used as anode material in lithium‐ion batteries, the spiky Nb2O5 nanoparticles show a higher capacity (143 mAh g−1) than collapsed spiky particles (92 mAh g−1) and nanorods (37 mAh g−1) because of fast lithium‐ion diffusion on the surface nanostructure and high dispersibility.

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Self-assembled mesoporous Nb₂O₅ as a high performance anode material for rechargeable lithium ion batteries

Cited by 10 publications

References 40 publications

Construction of a Flexible Nb₂O₅/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Construction of a Flexible Nb₂O₅/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Lithium Niobate for Fast Cycling in Li-ion Batteries: Review and New Experimental Results

Growth Mechanism of Spiky Nb₂O₅ Nanoparticles and their Electrochemical Property

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Self-assembled mesoporous Nb2O5 as a high performance anode material for rechargeable lithium ion batteries

Cited by 10 publications

References 40 publications

Construction of a Flexible Nb2O5/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Construction of a Flexible Nb2O5/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Lithium Niobate for Fast Cycling in Li-ion Batteries: Review and New Experimental Results

Growth Mechanism of Spiky Nb2O5 Nanoparticles and their Electrochemical Property

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Product

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Self-assembled mesoporous Nb₂O₅ as a high performance anode material for rechargeable lithium ion batteries

Construction of a Flexible Nb₂O₅/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Construction of a Flexible Nb₂O₅/Carboxyl Multiwalled Carbon Nanotube Film as Anode for Lithium and Sodium Storages

Growth Mechanism of Spiky Nb₂O₅ Nanoparticles and their Electrochemical Property