Microemulsion-assisted synthesis of ultrafine Li4Ti5O12/C nanocomposite with oleic acid as carbon precursor and particle size controller

Wang, Yuan; Rong, Haibo; Li, Benzhen; Xing, Lidan; Li, Xiaoping; Li, Weishan

doi:10.1016/j.jpowsour.2013.07.093

Cited by 41 publications

(17 citation statements)

References 57 publications

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“…Despite many advantages associated with Li 4 Ti 5 O 12 , low electric conductivity prohibits its use in large-scale applications [6,7]. In order to overcome the problem, surface coating method has been devoted to the exploration of Li 4 Ti 5 O 12 , such as doping Li 4 Ti 5 O 12 with metals or metal oxides [8][9][10] and coating Li 4 Ti 5 O 12 with conductive carbons [11][12][13]. Wang et al [14] synthesized the rutile-TiO 2 -terminated Li 4 Ti 5 O 12 nanosheets by a facile method through adjusting the molar ratios of starting reactants.…”

Section: Introductionmentioning

confidence: 99%

Li4Ti5O12/TiO2-SiO2 and Li4Ti5O12/SiO2 composites as an anode material for Li-ion batteries

Kurc

2017

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The commercial electrode Li 4 Ti 5 O 12 was modified with SiO 2 and TiO 2 -SiO 2 . All samples were characterized by scanning electron microscope (SEM), particle size distribution (PSD), porous structure parameters (low-temperature N 2 sorption), galvanostatic charge-discharge test, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Appropriate amount of TiO 2 -SiO 2 and SiO 2 could effectively reduce the electrochemical polarization of Li 4 Ti 5 O 12 and enhance electrochemical reaction kinetics of Li + insertion/ deinsertion. Moreover, Li 4 Ti 5 O 12 /TiO 2 -SiO 2 provides a high rate capacity of 165 mAh g −1 at the high current density of 0.5 C. To investigate cycle stability of the electrode materials at high current density, the measurements were directly carried out at 3 C. SEM images of the LTO/TiO 2 -SiO 2 , LTO, and LTO/SiO 2 particles after galvanostatic charging/discharging show that they were coated by a uniform layer (the SEI layer).

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Section: Introductionmentioning

confidence: 99%

Li4Ti5O12/TiO2-SiO2 and Li4Ti5O12/SiO2 composites as an anode material for Li-ion batteries

Kurc

2017

Ionics

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“…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. State of the art LIB electrodes are produced by mixing electrochemical active powders with polymer binders and conductive agents such as carbon black [20,21], carbon nanotubes [22,23], or graphene [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…conductive agents such as carbon black [20,21], carbon nanotubes [22,23], or graphene [24,25]. The resulting slurries are coated onto Cu/Al current collectors as a ~100 µm thick film.…”

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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“…As an alternative anode material, spinel lithium titanate (Li 4 Ti 5 O 12 ) is attracting more and more attentions, because it has stable structure and higher lithium insertion potential (about 1.55 V vs. Li + /Li) than graphite [13][14][15][16][17][18]. However, Li 4 Ti 5 O 12 has a poor electronic conductivity and presents a catalytic activity toward the electrolyte decomposition [19,20].…”

Section: Introductionmentioning

confidence: 99%

Carbon coating of Li4Ti5O12-TiO2 anode by using cetyl trimethyl ammonium bromide as dispersant and phenolic resin as carbon precursor

Yuan

Liao

et al. 2014

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A new carbon coating method for improving the performance of anode material of lithium ion battery is proposed in this paper. In this method, cetyl trimethyl ammonium bromide (CTAB) is used as dispersant and phenolic resin formed in situ on Li 4 Ti 5 O 12 -TiO 2 is used as carbon precursor; thus, uniform coated sample with low carbon content is achieved. Three samples with different carbon contents are prepared, and their carbon content, morphology, structure, and electrochemical performance are investigated by thermogravimetry, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, electrochemical impedance spectroscopy, and charge-discharge test. It is found that the sample with a carbon content of as low as 2.5 wt.% exhibits superior electrochemical performance. It delivers an initial capacity of 162.4 mAh g −1 with capacity retention of 95 % after 200 cycles at 1 C rate. When cycled at a higher rate of 5 C, the sample delivers a capacity of 148 mAh g −1 with no apparent capacity decaying after 90 cycles. The superior performance of the developed anode can be attributed to the uniform carbon coating.

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Microemulsion-assisted synthesis of ultrafine Li4Ti5O12/C nanocomposite with oleic acid as carbon precursor and particle size controller

Cited by 41 publications

References 57 publications

Li4Ti5O12/TiO2-SiO2 and Li4Ti5O12/SiO2 composites as an anode material for Li-ion batteries

Li4Ti5O12/TiO2-SiO2 and Li4Ti5O12/SiO2 composites as an anode material for Li-ion batteries

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

Carbon coating of Li4Ti5O12-TiO2 anode by using cetyl trimethyl ammonium bromide as dispersant and phenolic resin as carbon precursor

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