High temperature investigation of electrochemical lithium insertion into Li4Ti5O12

Markus, Isaac M.; Prill, Marco; Dang, Siaufung; Markus, T.; Spatschek, Robert; Singheiser, L.

doi:10.1039/c6cp05466h

Cited by 3 publications

(5 citation statements)

References 31 publications

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“…However, Small 2022, 18, 2202901 the LCTO-1.0 sample bring about Li 2 TiO 3 impurity due to the phase transformation. [40] Figure S1, Supporting Information, displays 3D structural framework of LCTO, in which lithium ions occupy 8a site, Cr 3+ and Ti 4+ ions are randomly scattered at the 16d site in a ratio of nearly 1:1, and O ions occupy the 32e site to form a cubic close-packed array. [14,41] The microstructure of LCTO was further characterized by transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) (Figure 2a-f).…”

Section: Resultsmentioning

confidence: 99%

High Pressure Rapid Synthesis of LiCrTiO₄ with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

Qin

Liang

et al. 2022

Small

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Among multitudinous recommendations, Li 4 Ti 5 O 12 (LTO) is considered as a promising anode material owing to its steady operating voltage platform at 1.55 V (versus Li/Li + ), which can prevent the growth of lithium dendrites. [5] In addition, the zero-strain insertion characteristic makes it possess excellent cycle performance and stability. [6,7] Meanwhile, the operational voltage of LTO can also prevent the decomposition of most electrolyte. [8] However, the inherent low conductivity (<10 −13 S cm −1 ) [9] and poor ion diffusion coefficient (10 −13 cm 2 s −1 ), [10] limit its large-scale application. In order to solve this problem, researchers have been introduced Cr 3+ into the lattice of LTO, which can not only reduce the average working potential to 1.5 V (versus Li/Li + ), but effectively improve the electrochemical performance. [11] For example, Song et al. reported LCTO formed by doping Cr 3+ into LTO qualified higher capacity especially at high rate, and better ionic diffusivity. [12] Wu et al. found that Cr 3+ doped LCTO exhibits exceptional cycling stability at high current densities. [13] Although the theoretical specific capacity of LCTO is only 157 mAh g −1 , the lower lithium content has advantages in terms of lithium resource requirements. [14] More importantly, the conductivity (10 −6 S cm −1 ) and lithium-ion diffusion coefficient (10 −8 -10 −9 cm 2 s −1 ) have been significantly enhanced compared with LTO. [15,16] Transition metal oxides are elementally abundant and inexpensive, and exhibit excellent stability in redox environments. [17] Therefore, LCTO has become a promising anode material for lithium-ion batteries with superior industrialization potential.In order to realize the industrialization development as soon as possible, a great deal of synthetic technologies have been explored and reported, such as solid-state reaction, [14,18] solgel, [19] electro-spinning, [20] acrylic acid polymerization [21] and sonochemistry. [22] The existing research on LCTO mainly concentrates on two aspects, one effective approach is to increase the conductivity of materials, such as coating and composite carbon materials, [23] or ion doping, [16] which can further ameliorate the electrochemical performance. However, the coating of carbon material will reduce the tap density, so as to reduce the energy density, and there is also a current lag phenomenon at high rate. Another approach is forming nanostructures, [24] which can provide an enormous specific surface area and Lithium-ion battery based on LiCrTiO 4 (LCTO) is considered to be a promising anode material, as they provide higher safety and durability beyond than that of graphite electrode. However, the applications of this transformative technology demand improved inherent electrical conductivity of LCTO as well as a simple and rapid synthetic route. Here, LCTO with oxygen vacancies (OVs) is fabricated using high-pressure synthesis technology in only 40 min. The optimal synthesis pressure is 0.8 GPa (LCTO-0.8). The reversible capacity of LCTO-0.8 at...

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Section: Resultsmentioning

confidence: 99%

High Pressure Rapid Synthesis of LiCrTiO₄ with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

Qin

Liang

et al. 2022

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“…Reproduced with permission. 52 Copyright 2016, The Royal Society of Chemistry routes have large energy barriers (~0.7 eV). 53 Diffusion of Li + in Li 7 + x Ti 5 O 12 (x ( 1) follows a cooperative hopping mechanism (a kind of synergetic effect), in which one 8a Li + goes to an nearby 16c site and another 16c 0 Li + goes to a nearby empty 8a 0 site (8a !…”

Section: + Transmission In Lto and Two-phase Interfacementioning

confidence: 99%

Section: Lto Structure and Properties During Li+ Insertion/extractionmentioning

confidence: 99%

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Li₄Ti₅O₁₂ spinel anode: Fundamentals and advances in rechargeable batteries

Zhang

Yang

et al. 2021

InfoMat

114

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The Li4Ti5O12 (LTO) spinel material, ranking at the second large market share after graphite, is a promising anode material for lithium‐ion batteries due to its good cycle stability, rate capability, and safety with both conventional and low‐temperature electrolytes. However, several critical challenges, such as the low capacity and gassing issue, hindered the wide applications of LTO anode. Recent progress indicated that the LTO performances are possible to be further improved by novel strategies, such as heterogeneous phase control, surface engineering, or overlithiation. To rethink and develop advanced LTO anodes, this review intensively associates the performances and modification strategies with the electronics/crystal structures. From a thermodynamic/kinetic point of view, we summarized the data obtained from recently developed characterization techniques, and the results of electrochemical performances and fundamental structures of LTO to potentially address several key challenges and issues toward advanced LTO anodes. As a result, light is shed on the future research direction of the LTO anodes.image

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“…The purpose of the present article is therefore to seamlessly connect the atomistic and continuum scale, illustrated for the Ni-H system. This system is used as a prototype in atomistic simulations for the understanding of hydrogen embrittlement phenomena [4] and rechargeable batteries [5][6][7]. Mechanical deformations play a crucial role, and thus a careful thermodynamic inspection is essential for a thorough understanding.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Phase Equilibria in Ni-H: Bridging the Atomistic with the Continuum Scale

Korbmacher

Pezold

Brinckmann

et al. 2018

Metals

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In this paper, we present a model which allows bridging the atomistic description of two-phase systems to the continuum level, using Ni-H as a model system. Considering configurational entropy, an attractive hydrogen-hydrogen interaction, mechanical deformations and interfacial effects, we obtained a fully quantitative agreement in the chemical potential, without the need for any additional adjustable parameter. We find that nonlinear elastic effects are crucial for a complete understanding of constant volume phase coexistence, and predict the phase diagram with and without elastic effects.

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High temperature investigation of electrochemical lithium insertion into Li₄Ti₅O₁₂

Cited by 3 publications

References 31 publications

High Pressure Rapid Synthesis of LiCrTiO₄ with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

High Pressure Rapid Synthesis of LiCrTiO₄ with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

Li₄Ti₅O₁₂ spinel anode: Fundamentals and advances in rechargeable batteries

Modeling of Phase Equilibria in Ni-H: Bridging the Atomistic with the Continuum Scale

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High temperature investigation of electrochemical lithium insertion into Li4Ti5O12

Cited by 3 publications

References 31 publications

High Pressure Rapid Synthesis of LiCrTiO4 with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

High Pressure Rapid Synthesis of LiCrTiO4 with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

Li4Ti5O12 spinel anode: Fundamentals and advances in rechargeable batteries

Modeling of Phase Equilibria in Ni-H: Bridging the Atomistic with the Continuum Scale

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Product

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High temperature investigation of electrochemical lithium insertion into Li₄Ti₅O₁₂

High Pressure Rapid Synthesis of LiCrTiO₄ with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

High Pressure Rapid Synthesis of LiCrTiO₄ with Oxygen Vacancy for High Rate Lithium‐Ion Battery Anodes

Li₄Ti₅O₁₂ spinel anode: Fundamentals and advances in rechargeable batteries