Preparation of particulate Li4Ti5O12 having excellent characteristics as an electrode active material for power storage cells

Nakahara, Kiyoshi; Nakajima, Ryosuke; Matsushima, Toshiyasu; Majima, Hiroshi

doi:10.1016/s0378-7753(03)00169-1

Cited by 228 publications

(128 citation statements)

References 13 publications

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“…48 This lower capacity in the RRDE configuration is most likely due to the absence of a conductive carbon additive in the electrode formulation. Practically speaking, though, the obtained Li + -insertion capacity is more than sufficient for our purposes.…”

Section: Understanding the Reactivity Ofmentioning

confidence: 99%

Reactivity of the Ionic Liquid Pyr₁₄TFSI with Superoxide Radicals Generated from KO₂or by Contact of O₂with Li₇Ti₅O₁₂

Schwenke

Herranz

Gasteiger

et al. 2015

J. Electrochem. Soc.

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Ionic liquids are attractive candidates as electrolyte solvents for Li-O 2 cells, primarily due to their low volatility, high anodic stability, and low flammability. Specifically, the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr 14 TFSI) has attracted considerable attention thanks to its electrochemical and chemical stability. In this work, we demonstrate via our recently developed UV-Vis screening method that Pyr 14 TFSI unfortunately reacts with the superoxide radical (O •− 2 ) which is produced during the discharge of Li-O 2 cells. To clarify the reaction mechanism of O •− 2 with Pyr 14 TFSI, we take advantage of the recently described formation of O •− 2 upon contact between lithiated lithium titanate (LTO) and O 2 to produce a sufficient amount of degradation products from the reaction of Pyr 14 TFSI with O •− 2 that can be detected by NMR. Furthermore, we validate this new screening method for solvent decomposition by superoxide radicals by investigating the behavior of lithiated LTO in contact with O 2 using RRDE voltammetry.

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Section: Understanding the Reactivity Ofmentioning

confidence: 99%

Reactivity of the Ionic Liquid Pyr₁₄TFSI with Superoxide Radicals Generated from KO₂or by Contact of O₂with Li₇Ti₅O₁₂

Schwenke

Herranz

Gasteiger

et al. 2015

J. Electrochem. Soc.

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“…The common approach to achieve high volumetric capacity is to prepare the LTO electrode in micro-size, spherical, and dense particles. However, while having a high tap density, these micro-size LTO electrodes usually suffer from poor capacity and rate capability, because of the limitation induced by the long Li + diffusion path throughout the particles 14,15 . On the contrary, our LTO electrode, in virtue of its unique nanoporous morphology exploiting a uniform, highly conductive carbon-coating layer, marks superiority over conventional materials, by offering a relatively high tap density, that is, 1.31 g cm − 3 combined with excellent electrochemical performance.…”

Section: Batterymentioning

confidence: 99%

A high-rate long-life Li4Ti5O12/Li[Ni0.45Co0.1Mn1.45]O4 lithium-ion battery

et al. 2011

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Lithium batteries are receiving considerable attention as storage devices in the renewable energy and sustainable road transport fi elds. However, low-cost, long-life lithium batteries with higher energy densities are required to facilitate practical application. Here we report a lithium-ion battery that can be cycled at rates as high as 10 C has a life exceeding 500 cycles and an operating temperature range extending from − 20 to 55 ° C. The estimated energy density is 260 W h kg − 1 , which is considerably higher than densities delivered by the presently available Li-ion batteries.

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“…The retention rate of discharge capacity was 84%. Nakahara et al reported [21] that the rechargeable capacity and cycle stability of C/LTO anode at 50 °C was superior to that at 25 °C. This may be resulted in that electric conductivity of C/LTO is raised at 50 °C.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Electrochemical Properties of C/Li4Ti5O12 Powders by Spray Pyrolysis

Yamada

Kodera

Ogihara

2010

Trans. Mat. Res. Soc. Japan

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Spherical C/Li 4 Ti 5 O 12 anode powders were prepared by spray pyrolysis with aqueous solution. The particle characteristics of C/Li 4 Ti 5 O 12 powders were determined by SEM, XRD and DTA-TG. C/Li 4 Ti 5 O 12 anode powder had a spherical morphology with non aggregation and porous structure. The carbon content was around 13 wt%. XRD analysis revealed that the spinel phase was obtained by heating at 750 °C under N 2 atmosphere. The discharge capacity of C/Li 4 Ti 5 O 12 was 160 mAh/g at 1C. That of C/Li 4 Ti 5 O 12 decreased to 90 mAh/g at 20 C. 96 % of initial discharge capacity was maintained at 1 C after 100 cycles. 85 % of it was maintained at 20 C after 300 cycles.

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Preparation of particulate Li4Ti5O12 having excellent characteristics as an electrode active material for power storage cells

Cited by 228 publications

References 13 publications

Reactivity of the Ionic Liquid Pyr₁₄TFSI with Superoxide Radicals Generated from KO₂or by Contact of O₂with Li₇Ti₅O₁₂

Reactivity of the Ionic Liquid Pyr₁₄TFSI with Superoxide Radicals Generated from KO₂or by Contact of O₂with Li₇Ti₅O₁₂

A high-rate long-life Li4Ti5O12/Li[Ni0.45Co0.1Mn1.45]O4 lithium-ion battery

Synthesis and Electrochemical Properties of C/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> Powders by Spray Pyrolysis

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Preparation of particulate Li4Ti5O12 having excellent characteristics as an electrode active material for power storage cells

Cited by 228 publications

References 13 publications

Reactivity of the Ionic Liquid Pyr14TFSI with Superoxide Radicals Generated from KO2or by Contact of O2with Li7Ti5O12

Reactivity of the Ionic Liquid Pyr14TFSI with Superoxide Radicals Generated from KO2or by Contact of O2with Li7Ti5O12

A high-rate long-life Li4Ti5O12/Li[Ni0.45Co0.1Mn1.45]O4 lithium-ion battery

Synthesis and Electrochemical Properties of C/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> Powders by Spray Pyrolysis

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Reactivity of the Ionic Liquid Pyr₁₄TFSI with Superoxide Radicals Generated from KO₂or by Contact of O₂with Li₇Ti₅O₁₂

Reactivity of the Ionic Liquid Pyr₁₄TFSI with Superoxide Radicals Generated from KO₂or by Contact of O₂with Li₇Ti₅O₁₂