Controllable formation and electrochemical properties of one-dimensional nanostructured spinel Li4Ti5O12

Li, Junrong; Tang, Zilong; Zhang, Zhongtai

doi:10.1016/j.elecom.2005.06.012

Cited by 192 publications

(68 citation statements)

References 29 publications

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“…Interestingly, the binding energy positions of satellites remained. At this temperature the intensities of the O 1s peaks representing different orientations and/or different carbonyls (Co 2 (CO) 8 , Co 4 (CO) 12 ) at 531.7 and 532.6 eV for O 1s diminished or decreased significantly ( Fig. 30(B)).…”

Section: Formation and Stabilization Of Comentioning

confidence: 99%

“…1 week or agitating the system to eliminate diffusion limitations. Layered anisotropic titanate nanostructures can be prepared from a broad range of TiO 2 sources [10][11][12] and using different compositions, bases [13][14][15], reaction times, temperatures and post-synthetic treatments. Changing the recipe allows fine-tuning the properties of the product mixture (e.g.…”

Section: Synthesis Of 1d Titanatesmentioning

confidence: 99%

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Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Kukovecz

Kordás

Kiss

2016

Surface Science Reports

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Titanates are salts of polytitanic acid that can be synthesized as nanostructures in a great variety concerning crystallinity, morphology, size, metal content and surface chemistry.Titanate nanotubes (open-ended hollow cylinders measuring up to 200 nm in length and 15 nm in outer diameter) and nanowires (solid, elongated rectangular blocks with length up to 1500 nm and 30-60 nm diameter) are the most widespread representatives of the titanate nanomaterial family. This review covers the properties and applications of these two materials from the surface science point of view. Dielectric, vibrational, electron and X-ray spectroscopic results are comprehensively discussed first, then surface modification methods including covalent functionalization, ion exchange and metal loading are covered. The versatile surface chemistry of onedimensional titanates renders them excellent candidates for heterogeneous catalytic, photocatalytic, photovoltaic and energy storage applications, therefore, these fields are also reviewed.

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Section: Formation and Stabilization Of Comentioning

confidence: 99%

Section: Synthesis Of 1d Titanatesmentioning

confidence: 99%

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Kukovecz

Kordás

Kiss

2016

Surface Science Reports

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“…The initial semicircle is thought to occur due to resistance that occurs around an interface of an electrode during a charge process. In addition, it can be verified that a linear curve that gradually increases at a gradient of 45 degrees as the frequency decreases around about 100 Ω is obtained and thus, the typical capacitor shape appears [12,13]. It can be ascertained from Fig.…”

Section: Resultsmentioning

confidence: 57%

Preparation and characterization of Li4Ti5O12 synthesized using hydrogen titanate nanowire for hybrid super capacitor

Kim¹,

Yoon²

2013

J Adv Ceram

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Abstract:The electrical characteristics of hybrid super capacitor were evaluated by synthesizing LTO (Li 4 Ti 5 O 12 ) using TiO 2 having a hydrogen titanate nanowire form. Preparation of the hydrogen titanate nanowire was implemented by using TiO 2 having size of 60 nm and NaOH, and performing synthesis at 70 ℃ for 6 h with a sonochemical method. LTO compound was synthesized at 150 ℃ for 36 h and at 180 ℃ for 36 h respectively by using the hydrogen titanate nanowire and LiOH·H 2 O as starting materials with a hydrothermal method. The final LTO compound was synthesized at 700 ℃ for 6 h using a solid-state method. As a result of manufacturing the hybrid super capacitor using LTO synthesized at 180 ℃ for 36 h with the hydrothermal method, a capacity of 198 mA·h/g has been achieved compared to a theoretical capacity of 172 mA·h/g of existing LTO, and thus, the capacity has been increased by about 13%. Further, such excellent cycle performance has ensured its possibility as a high-capacity capacitor.

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“…However, today's conventional LIBs still suffer from rather slow charging/discharging performance using conventional electrode materials such as, for instance, graphite as a typical anode material [3]. Therefore, in recent years, huge efforts were made to increase the rate capabilities of LIB by introducing new electroactive material classes e.g., spinel-structured materials such as Li 4 Ti 5 O 12 (LTO) and LiMn 2 O 4 (LMO) in a wide range of accessible nanostructures such as nanoparticles [4][5][6], nanotubes [7][8][9], nanowires [10,11], nanosheets [12][13][14], mesoporous materials [15][16][17] and many more. Although increasing rate capabilities were successfully achieved, it is well known that the electrochemical properties of the electrode materials do not play the only key role, the electrode and current collector interface architecture [18,19] are key as well.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Networks for Energy Storage: Vertically Aligned Carbon Nanotubes (VACNT) as Current Collectors for High-Power Li4Ti5O12(LTO)//LiMn2O4(LMO) Lithium-Ion Batteries

et al. 2017

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Abstract:As a concept for electrode architecture in high power lithium ion batteries, self-supported nanoarrays enable ultra-high power densities as a result of their open pore geometry, which results in short and direct Li + -ion and electron pathways. Vertically aligned carbon nanotubes (VACNT) on metallic current collectors with low interface resistance are used as current collectors for the chemical solution infiltration of electroactive oxides to produce vertically aligned carbon nanotubes decorated with in situ grown LiMn 2 O 4 (LMO) and Li 4 Ti 5 O 12 (LTO) nanoparticles. The production processes steps (catalyst coating, VACNT chemical vapor deposition (CVD), infiltration, and thermal transformation) are all scalable, continuous, and suitable for niche market production to achieve high oxide loadings up to 70 wt %. Due to their unique transport structure, as-prepared nanoarrays achieve remarkably high power densities up to 2.58 kW kg −1 , which is based on the total electrode mass at 80 C for LiMn 2 O 4 //Li 4 Ti 5 O 12 full cells. The tailoring of LTO and LMO nanoparticle size (~20-100 nm) and VACNT length (array height: 60-200 µm) gives insights into the rate-limiting steps at high current for these kinds of nanoarray electrodes at very high C-rates of up to 200 C. The results reveal the critical structural parameters for achieving high power densities in VACNT nanoarray full cells.

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Controllable formation and electrochemical properties of one-dimensional nanostructured spinel Li4Ti5O12

Cited by 192 publications

References 29 publications

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Preparation and characterization of Li4Ti5O12 synthesized using hydrogen titanate nanowire for hybrid super capacitor

Nanostructured Networks for Energy Storage: Vertically Aligned Carbon Nanotubes (VACNT) as Current Collectors for High-Power Li4Ti5O12(LTO)//LiMn2O4(LMO) Lithium-Ion Batteries

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