Sol-Gel Synthesis of Nanocomposite Cu-Li4Ti5O12Structures for Ultrahigh Rate Li-Ion Batteries

Erdaş, Aslıhan; Özcan, Şeyma; Guler, Mehmet Oguz; Akbulut, Hatem

doi:10.12693/aphyspola.127.1026

Cited by 7 publications

(3 citation statements)

References 5 publications

(2 reference statements)

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“…Erdas et al [ 298 ] synthesized a Cu–LTO electrode by combining sol–gel process and electroless copper deposition technique. A one-pot co-precipitation method was carried out by Liu et al [ 299 ] for the fabrication of Li 4 Ti 5 O 12 /V 2 O 5 nanocomposites without surfactant.…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…The scanning electron microscopy (SEM) image indicates that the sample has a polyhedron morphology composed of subgrains (particle size ranging from 60 to 90 nm), and a uniform particle size distribution. Erdas et al [298] synthesized a Cu-LTO electrode by combining sol-gel process and electroless copper deposition technique. A one-pot co-precipitation method was carried out by Liu et al [299] for the fabrication of Li4Ti5O12/V2O5 nanocomposites without surfactant.…”

Section: Sol-gel Processmentioning

confidence: 99%

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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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Section: Synthesis Methodsmentioning

confidence: 99%

Section: Sol-gel Processmentioning

confidence: 99%

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

Julien,

Mauger

2024

Micromachines

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“…In order to settle poor electrical performance, the certain methods are used, such as reducing particle size to nanoscale [16,17] and coating surface or composing with conductive phases like Cu, Ag, C and graphene [18][19][20][21]. Even though mixing or coating the LTO with conductive phases is effective to enhance its electrical performance, the methods have no contribution on lattice electronic conductivity and diffusivity of lithium ion for fast charge and discharge performance.…”

Section: Introductionmentioning

confidence: 99%

Carrier and Transition Metals (M = Nb, Cr and Fe) Doping Effects on Structure and Electronic Structure in Spinel Li4Ti5O12 Compounds

Sarantuya

Tsogbadrakh

Sevjidsuren

et al. 2020

SSP

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Spinel Li4Ti5O12 (LTO) is one of the most promising candidate anode material for Li-ion battery (LIB) known, as zero strain material, it has poor intrinsic electronic properties. In order to enhance it, we have investigated effect of doping on electronic conductivity of spinel LTO phase structure. We consider the carrier and transition metal doping effect on structure and electronic structure of spinel LTO. It is shown that the doping can improve the electronic conduction of spinel LTO. Our calculations were based on the projector augmented wave (PAW) method with the generalized gradient approximation (GGA+U+J0) including the Hubbard U parameter for exchange correlation functional within the framework of density functional theory (DFT).

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Investigations on Li4Ti5O12/Ti3O5 Composite as an Anode Material for Lithium–Ion Batteries

Lin

Zhang

et al. 2017

JOM

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Sol-Gel Synthesis of Nanocomposite Cu-Li₄Ti₅O₁₂Structures for Ultrahigh Rate Li-Ion Batteries

Cited by 7 publications

References 5 publications

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

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

Carrier and Transition Metals (M = Nb, Cr and Fe) Doping Effects on Structure and Electronic Structure in Spinel Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> Compounds

Investigations on Li4Ti5O12/Ti3O5 Composite as an Anode Material for Lithium–Ion Batteries

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