Introduction of amorphous TiO2 coating layer to improve the lithium storage of SiO2 nanospheres anode

Ding, Mengzhao; Zhai, Jianguang; Zeng, Panjing; Zhang, Chaomin; Ping, Yunxia

doi:10.1007/s11581-021-04435-w

Cited by 12 publications

(10 citation statements)

References 39 publications

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“…The peaks at binding energies 458 eV and 464 eV correspond to the valence state of Ti 2p3/2 and Ti 2p1/2. In the O1s spectra, three peaks at binding energies of 530 eV, 531 eV, and 532.8 eV attributed to the Ti-O, O-H, and Si-O bonds are observed, which tends to develop Ti-OH bond present in the TiO2 as mentioned in the literature [42,46].…”

Section: Materials Characteristicsmentioning

confidence: 62%

“…It was reported that a thin layer of manganese oxide coating improves the lithiation kinetics, while a thick coating reduces the rate of lithiation. Recently, titanium oxide has been proposed in the literature as a favourable coating material due to its low volume expansion, better Li-ion transfer characteristics, and safety features [42,43].…”

Section: Introductionmentioning

confidence: 99%

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Natural Graphite reinforced with Si@TiO2 core-shell nanoparticles as anode for Li-ion batteries

Vats

Gupta

et al. 2023

Preprint

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Commercial Li-ion batteries rely on anodes made of graphite, but low specific capacity (372 mAh/g) of graphite restricts its usage in high-energy demand applications. Literature suggests that Si has a high specific capacity (4200 mAh/g), but huge volume expansion during the electrochemical process leads to fast capacity decay. This work deals with the development of graphite-based composite material with the potential to be used as an anode. Adopting the structural modification approach and co-utilization strategy, the composite material is developed through graphite reinforcement with the developed core-shell nanoparticles (Si@TiO2). Si@TiO2 nanoparticles are synthesized to develop a thin coating layer (≈ 5 nm) of TiO2 on Si using the peptization technique. The developed materials are characterized using FESEM, EDS, TEM, XPS, and XRD. Further, electrochemical response of the developed composite material is recorded using Cyclic voltammetry (CV), Electrochemical impedance spectroscopy (EIS), and Galvanostatic charge/discharge test (GCD). Compared with graphite, the developed composite anode exhibits improved specific capacity with a small percentage (10%) mixing of core-shell nanoparticles into graphite. The composite anode demonstrates stable electrochemical behavior. The initial specific capacity attains the value of ≈ 657 mAh/g at 1C, and 87% capacity retention has been observed after 100 cycles. Furthermore, developed composite shows good capacity retention at higher C-rate values.

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Section: Materials Characteristicsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Natural Graphite reinforced with Si@TiO2 core-shell nanoparticles as anode for Li-ion batteries

Vats

Gupta

et al. 2023

Preprint

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“…Li-ion storage capacities of the Ni/TiO 2 NTs in this work and published TiO 2 electrodes are compared in Figure S4, Supporting Information. [22,24,[58][59][60][61][62][63] The Ni/TiO 2 NTs have a higher reversible capacity, which is due to their unique tubular structure, tubular volume, and excellent structural stability during the lithium-ion storage process. First, Ni/TiO 2 NTs have a stable tubular shape that can help them achieve long-term cycling by acting as a buffer during repeated electrochemical reactions.…”

Section: Resultsmentioning

confidence: 99%

Discharged Titanium Oxide Nanotube Arrays Coated with Ni as a High‐Performance Lithium Battery Electrode Material

et al. 2022

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Transition metal oxides are in high demand as electrode materials for alkali metal‐ion batteries due to high theoretical capacity. However, low electron transfer kinetics and slow ion migration lead to poor cycle stability and rate performance of the transition metal oxide electrode. Herein, TiO2 nanotube arrays coated with Ni (Ni/TiO2NTs) are fabricated by using predischarge‐electrodeposition method and subsequent calcination under H2/N2. In the Ni/TiO2NTs composite, TiO2NTs and Ni nanoparticles play the role of framework and coating layer, respectively. The as‐prepared Ni/TiO2NTs composites have a high specific surface area and a unique tubular structure, which facilitates the quick penetration of the electrolyte into the tubes and reduces the lithium ions’ diffusion distance. The incorporation of Ti3+ and metallic nickel in the hydrogenated TiO2NTs also increases conductivity. Besides, the spin‐polarized surface capacitance of Ni0 nanoparticles causes the magnetic changes that generate an extra lithium‐ion storage capacity. The Ni/TiO2NTs composite electrode maintains a high capacity of 507 mA h g−1 after 100 cycles at 0.2 A g−1. Here, the predischarge‐electrodeposition provides a new route for the preparation of composite materials.

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“…Recently, titanium oxide has been proposed in the literature as a favorable coating material due to its low volume expansion, better Li-ion transfer characteristics, and safety features. [42,43] Xu et al [44] synthesized a nanocomposite of SiO@TiO 2 as an anode through a ball milling and sol-gel process. The authors stated that the developed structure has excellent cyclic stability and high coulombic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Li‐ion Battery Performance through the Integration of Si@TiO₂ Core‐Shell Nanoparticles with Natural Graphite

Vats,

Gupta,

Gupta

et al. 2024

ChemistrySelect

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In this study, Si@TiO2 core‐shell nanoparticles are synthesized using the peptization technique, resulting in a thin and uniform TiO2 coating layer over silicon nanoparticles. This coating layer serves the purpose of controlling the structural degradation of the silicon nanoparticles. These core‐shell nanoparticles are then reinforced into the natural graphite with the potential to be used as a composite anode material (Graphite/Si@TiO2) for Li‐ion batteries. The developed composite material exhibits an initial specific capacity of ≈675 mAh/g at 0.5 A/g, and after 100 cycles it retains the capacity of 75 %. Compared with Graphite/Si composite anode, the developed composite anode material shows improved cyclic stability. The pre‐and post‐cycling morphological analysis of Graphite/Si and Graphite/Si@TiO2 composite anode reveals the degradation behavior. It is assumed that the TiO2 coating provides a protective shield for the silicon particles, preventing their interaction with the electrolyte and causing less material to deposit over the anode surface. Electrochemical Impedance Spectroscopy (EIS) analysis supports these findings, with the Graphite/Si composite anode exhibiting higher resistance than the Graphite/Si@TiO2 anode. In conclusion, the study demonstrates the potential of using Si@TiO2 core‐shell nanoparticles as a reinforcing agent for natural graphite to develop high‐performance composite anode material for Li‐ion batteries.

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Introduction of amorphous TiO2 coating layer to improve the lithium storage of SiO2 nanospheres anode

Cited by 12 publications

References 39 publications

Natural Graphite reinforced with Si@TiO2 core-shell nanoparticles as anode for Li-ion batteries

Natural Graphite reinforced with Si@TiO2 core-shell nanoparticles as anode for Li-ion batteries

Discharged Titanium Oxide Nanotube Arrays Coated with Ni as a High‐Performance Lithium Battery Electrode Material

Enhancing Li‐ion Battery Performance through the Integration of Si@TiO₂ Core‐Shell Nanoparticles with Natural Graphite

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Introduction of amorphous TiO2 coating layer to improve the lithium storage of SiO2 nanospheres anode

Cited by 12 publications

References 39 publications

Natural Graphite reinforced with Si@TiO2 core-shell nanoparticles as anode for Li-ion batteries

Natural Graphite reinforced with Si@TiO2 core-shell nanoparticles as anode for Li-ion batteries

Discharged Titanium Oxide Nanotube Arrays Coated with Ni as a High‐Performance Lithium Battery Electrode Material

Enhancing Li‐ion Battery Performance through the Integration of Si@TiO2 Core‐Shell Nanoparticles with Natural Graphite

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Enhancing Li‐ion Battery Performance through the Integration of Si@TiO₂ Core‐Shell Nanoparticles with Natural Graphite