Synthesis and characterization of spinel Li4Ti5O12 anode material by oxalic acid-assisted sol–gel method

Yan, Hao; Lai, Qi; Lu, Ji-Zheng; Wang, Hongli; Chen, Yuan-Duan; Ji, Xiaoling

doi:10.1016/j.jpowsour.2005.09.063

Cited by 127 publications

(45 citation statements)

References 21 publications

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“…Table 2 summarizes these results. Based on previous studies 21,31 and results obtained from this paper, it is clear that organic additive such as oxalic acid and PEG play an important role in controlling the morphology and particle size uniformity of the final products. In the present sol-gel procedure, the simultaneous presence of oxalate ion and PEG chains with different inhibitory mechanisms are able to control the size and morphology of tungsten trioxide particles at the different preparation steps.…”

Section: Patilmentioning

confidence: 58%

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Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Ghasemi

Jafari

2017

Mat. Res.

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Sol-gel modified Pechini's method was used to prepare WO 3 nanopowders using dicarboxylic acid and polyethylene glycol as the chelating agent and polymeric source, respectively. WO 3 powders were first prepared by calcination of resin precursor at 550ºC under various initial concentrations of metal ion (12.5-50 mmol), acid (125-500 mmol), a complexing agent (32-262 mmol), and polyethylene glycol (1-16.5 mmol) in the air atmosphere. The products were characterized using X-ray powder diffraction, field emission scanning electron microscopy, and energy dispersive spectroscopy. The results revealed that the WO 3 nanopowders prepared with different amounts of chelating agent and polyethylene glycol, crystallized in monoclinic phase. The nanopowders were impurity-free due to the presence of the complexing agent and polyethylene glycol as carbon sources. Morphological evolution indicated that the nanopowders evolved from rod-like to regular and spherical shapes, depending on complexing agent and polyethylene glycol amounts. Nanopowders with an average particle size of approximately 58 nm and a narrow size distribution were obtained.

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Section: Patilmentioning

confidence: 58%

“…The complex formation between Reaction 1 tungsten species and carboxylic acids are known 15,[19][20][21] . In the presence of the complexing agent, it is expected that growth of particles stops in all directions and powders with a spherical morphology are obtained.…”

Section: Sem Analysismentioning

confidence: 99%

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Ghasemi

Jafari

2017

Mat. Res.

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“…Small-sized particle will obviously shorten the Li + diffusion path and broaden the electrode/electrolyte contact surface [2]. Various synthesis methods are available for the fabrication of Li 4 Ti 5 O 12 such as, solid-state reaction [3][4][5], sol-gel [6][7][8], hydrothermal [9], spray pyrolysis [10], molten salt [11], and microwave irradiation [12]. Generally, spinel-Li 4 Ti 5 O 12 is synthesized by a conventional solid-state reaction using TiO 2 and Li 2 CO 3 (or LiOH) as starting materials at high temperatures [13] because solid-state reaction using Li and Ti source as raw materials is easy and economical.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristics of Li₄Ti₅O₁₂Anode Material for Hybrid Supercapacitor

Lee¹,

Yoon²

2012

Journal of Electrical Engineering and Technology

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-Spinel-Li 4 Ti 5 O 12 was successfully synthesized by a solid-phase method at 800, 850, and 900℃ according to the Li 4 Ti 5 O 12 cubic spinel phase structure. To achieve higher EDLC energy density with the Li 4 Ti 5 O 12 , the negative electrode of the hybrid supercapacitor was studied in this work. The electrochemical performances of the hybrid supercapacitor and EDLC were characterized by constant current discharge curves, c-rate, and cycle performance testing. The capacitance (1st cycle) of the hybrid supercapacitor and EDLC was 209 and 109 F, respectively, which is higher than EDLC. The capacitance of the hybrid supercapacitor decreases from 209 F to 101 F after 20 cycles when discharged at several specific current densities ranging from 1 to 10 A. In contrast, capacitance of the EDLC hardly decreases after 20 cycles. Results show that hybrid supercapacitor benefits from the high rate capability of supercapacitor and high capacity of the battery. Findings also prove that the hybrid supercapacitor is an energy storage device where the supercapacitor and the Li ion secondary battery coexist in one cell system.

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“…Li4Ti5-O12 is a promising new anode material due to its low cost and good cyclic performance. [11][12][13][14][15] Particularly, it is a so-called zerostrain insertion material for application as a negative electrode. Thin film batteries use a solid electrolyte, therefore, the volume change of the electrode during charge and discharge can cause separation on the interfaces of the TFLIB.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Li₄Ti₅O₁₂Thin Film with Inverse Hemispheric Structure

Lee¹,

Jung²,

Park³

et al. 2010

Bulletin of the Korean Chemical Society

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Li4Ti5O12 thin film with inverse hemispheric structure was fabricated on a Pt/Ti/SiO2/Si substrate by the sol-gel and dip coating method for use as an anode for 3-dimensional (3D) thin-film batteries. Polystyrene (PS) beads of 400 nm diameter were used to prepare the template for the inverse hemispheric structure. A coating solution prepared using precursor sources was dropped on the template-deposited substrates, which were then calcinated at 400 o C. The template was removed by calcination, and the inverse hemispheric structure was successfully formed by an annealing process. The cyclic performance during high-rate charge/discharge processes of the Li4Ti5O12 film with inverse hemispheric structure was superior to that of the flat Li4Ti5O12 film.

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Synthesis and characterization of spinel Li4Ti5O12 anode material by oxalic acid-assisted sol–gel method

Cited by 127 publications

References 21 publications

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Preparation and Characteristics of Li₄Ti₅O₁₂Anode Material for Hybrid Supercapacitor

Synthesis of Li₄Ti₅O₁₂Thin Film with Inverse Hemispheric Structure

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Synthesis and characterization of spinel Li4Ti5O12 anode material by oxalic acid-assisted sol–gel method

Cited by 127 publications

References 21 publications

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Preparation and Characteristics of Li4Ti5O12Anode Material for Hybrid Supercapacitor

Synthesis of Li4Ti5O12Thin Film with Inverse Hemispheric Structure

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Product

Resources

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Preparation and Characteristics of Li₄Ti₅O₁₂Anode Material for Hybrid Supercapacitor

Synthesis of Li₄Ti₅O₁₂Thin Film with Inverse Hemispheric Structure