Ion-exchange synthesis and improved Li insertion property of lithiated H2Ti12O25as a negative electrode material for lithium-ion batteries

Kataoka, Kunimitsu; Nagai, Hiroki; Sotokawa, Tomoyuki; Kumashiro, Yoshimasa; Ishibai, Yoichi; Akimoto, Junji

doi:10.1016/j.jascer.2015.11.007

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…By comparison, the X‐ray patterns of both protonated titanates (Figure c) are very similar to each other. Moreover, the diffraction peaks of m‐H 2 Ti 12 O 25 and s‐H 2 Ti 12 O 25 are in good agreement with those reported previously . In addition, the relative intensities of the (2 0 0) and (1 1 0) peaks for m‐H 2 Ti 12 O 25 and s‐H 2 Ti 12 O 25 are different (Figure d).…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the diffraction peaks of m-H 2 Ti 12 O 25 and s-H 2 Ti 12 O 25 are in good agreement with those reported previously. [10,12,23] In addition, the relative intensities of the (2 00)and (110)peaks for m-H 2 Ti 12 O 25 and s-H 2 Ti 12 O 25 are different ( Figure 2d). As observed, the ratio of (0 03)to(110) diffraction peak for m-H 2 [24] Moreover,t he relative intensities of some diffractionp eaks are further compared quantitatively, and the diffractionp eak density ratios are listedi nT able S1 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Guo

Chen

Shan³

et al. 2017

ChemSusChem

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H2Ti12O25 holds great promise as a high‐voltage anode material for advanced lithium‐ion battery applications. To enhance its electrochemical performance, control of the crystal orientation and morphology is an effective way to cope with slow Li+‐ion diffusion inside H2Ti12O25 with severe anisotropy. In this report, Na2Ti6O13 nanorods, prepared from Na2CO3 and anatase TiO2 in molten NaCl medium, were used as a precursor in the synthesis of long single‐crystal H2Ti12O25 nanorods with reactive facets. The as‐prepared H2Ti12O25 nanorods with a diameter of 100–200 nm showed higher charge (extraction) specific capacity and better rate performance than previously reported systems. The reversible capacity of H2Ti12O25 was 219.8 mAh g−1 at 1C after 100 cycles, 172.1 mAh g−1 at 10C, and 144.4 mAh g−1 at 20C after 200 cycles; these values are higher than those of H2Ti12O25 prepared by the conventional soft‐chemical method. Moreover, the as‐prepared H2Ti12O25 nanorods exhibited superior cycle stability with more than 94 % retention of capacity with nearly 100 % coulombic efficiency after 100 cycles at 1C. On the basis of the above results, long single‐crystal H2Ti12O25 nanorods synthesized in molten NaCl with outstanding electrochemical characteristics hold a significant amount of promise for hybrid electric vehicles and energy‐storage systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Guo

Chen

Shan³

et al. 2017

ChemSusChem

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“…Figure 5 shows XRD pattern of HTO derived from cubic Li 2 TiO 3 . When the XRD pattern was compared with that of HTO derived from Na 2 Ti 3 O 7 , 13,14 both XRD patterns were considered to be similar except for the following points. (1) Each XRD peak was broad and (2) there were several peaks with different intensities for each XRD spectrum.…”

Section: Resultsmentioning

confidence: 99%

Synthesis Method and Electrochemical Properties of H₂Ti₁₂O₂₅ from Cubic Li₂TiO₃ for Lithium-Ion Batteries

Nagai¹,

Akimoto²

2021

J. Electrochem. Soc.

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A novel synthesis route of H2Ti12O25 was developed by a soft chemical method using cubic Li2TiO3 as a precursor compound. Cubic Li2TiO3 prepared by the hydrothermal method and having spherical primary particles, with diameters ranging from 30–50 nm, was converted to H2TiO3 by a Li+/H+ ion-exchange reaction using an HCl solution after annealing. H2Ti12O25, spherical in shape with diameters ranging from 20–40 nm, was prepared by heating the H2TiO3 under vacuum. The discharge capacity of the H2Ti12O25 was found to be approximately 280 mAh g−1, which is higher than that previously reported for H2Ti12O25 prepared from Na2Ti3O7. The retention rate of the sample was about 96% and the crystal structure of the sample was maintained after 100 cycles.

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“…LTO nanofibers were subsequently prepared by a second hydrothermal ion exchange process of H 2 Ti 2 O 5 ·H 2 O and LiOH·H 2 O and a final calcination at 350–400 °C. Kataoka et al [ 478 ] prepared the lithiated H 2 Ti 12 O 25 sample by the H + /Li + ion exchange synthetic technique in the molten LiNO 3 at 270 °C using H 2 Ti 12 O 25 as a starting compound. The obtained sample, H 1.05 Li 0.35 Ti 12 O 25−δ having δ = 0.3, exhibits a high discharge capacity of 192 mAh g −1 at 1 A g −1 current density.…”

Section: Synthesis Methodsmentioning

confidence: 99%

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Julien,

Mauger

2024

Micromachines

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The most popular anode material in commercial Li-ion batteries is still graphite. However, its low intercalation potential is close to that of lithium, which results in the dendritic growth of lithium at its surface, and the formation of a passivation film that limits the rate capability and may result in safety hazards. High-performance anodes are thus needed. In this context, lithium titanite oxide (LTO) has attracted attention as this anode material has important advantages. Due to its higher lithium intercalation potential (1.55 V vs. Li+/Li), the dendritic deposition of lithium is avoided, and the safety is increased. In addition, LTO is a zero-strain material, as the volume change upon lithiation-delithiation is negligible, which increases the cycle life of the battery. Finally, the diffusion coefficient of Li+ in LTO (2 × 10−8 cm2 s−1) is larger than in graphite, which, added to the fact that the dendritic effect is avoided, increases importantly the rate capability. The LTO anode has two drawbacks. The energy density of the cells equipped with LTO anode is lower compared with the same cells with graphite anode, because the capacity of LTO is limited to 175 mAh g−1, and because of the higher redox potential. The main drawback, however, is the low electrical conductivity (10−13 S cm−1) and ionic conductivity (10−13–10−9 cm2 s−1). Different strategies have been used to address this drawback: nano-structuration of LTO to reduce the path of Li+ ions and electrons inside LTO, ion doping, and incorporation of conductive nanomaterials. The synthesis of LTO with the appropriate structure and the optimized doping and the synthesis of composites incorporating conductive materials is thus the key to achieving high-rate capability. That is why a variety of synthesis recipes have been published on the LTO-based anodes. The progress in the synthesis of LTO-based anodes in recent years is such that LTO is now considered a substitute for graphite in lithium-ion batteries for many applications, including electric cars and energy storage to solve intermittence problems of wind mills and photovoltaic plants. In this review, we examine the different techniques performed to fabricate LTO nanostructures. Details of the synthesis recipes and their relation to electrochemical performance are reported, allowing the extraction of the most powerful synthesis processes in relation to the recent experimental results.

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Ion-exchange synthesis and improved Li insertion property of lithiated H₂Ti₁₂O₂₅as a negative electrode material for lithium-ion batteries

Cited by 6 publications

References 14 publications

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Synthesis Method and Electrochemical Properties of H₂Ti₁₂O₂₅ from Cubic Li₂TiO₃ for Lithium-Ion Batteries

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

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Ion-exchange synthesis and improved Li insertion property of lithiated H2Ti12O25as a negative electrode material for lithium-ion batteries

Cited by 6 publications

References 14 publications

High Lithium Insertion Voltage Single‐Crystal H2Ti12O25 Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

High Lithium Insertion Voltage Single‐Crystal H2Ti12O25 Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Synthesis Method and Electrochemical Properties of H2Ti12O25 from Cubic Li2TiO3 for Lithium-Ion Batteries

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

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Ion-exchange synthesis and improved Li insertion property of lithiated H₂Ti₁₂O₂₅as a negative electrode material for lithium-ion batteries

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Synthesis Method and Electrochemical Properties of H₂Ti₁₂O₂₅ from Cubic Li₂TiO₃ for Lithium-Ion Batteries