Synthesis of sawtooth-like Li4Ti5O12 nanosheets as anode materials for Li-ion batteries

Chen, Jizhang; Yang, Li; Fang, Shaohua; Tang, Yufeng

doi:10.1016/j.electacta.2010.06.015

Cited by 177 publications

(99 citation statements)

References 27 publications

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“…3 and pH values for the product solutions were listed in Table 1. The observed diffraction patterns show that all of the prepared materials are single phase of Li 4 Ti 5 O 12 except for the product from initial Li/Ti molar ratio of 2 where the pH value for the filtrates was lower than 12. Figure 4 shows XRD profile of the products from Ti-sol(A-6) at various initial Li/Ti molar ratios.…”

Section: The Effect Of Li/ti Molar Ratiomentioning

confidence: 94%

“…In contrast, the titania is completely converted to a ternary oxide (LTO) at pH 12 or higher if the Li:Ti molar ratio in the reaction mixture exceeds 2:1 or 2.5:1 from Ti-sol(A-6), and M-6, respectively. Therefore, pH is the key for preparing the single phase of Li 4 Ti 5 O 12 .…”

Section: The Effect Of Li/ti Molar Ratiomentioning

confidence: 99%

“…Since the anatase phase was coexisted in the hydrothermal products under supercritical conditions, initial Li/Ti molar ratio was varied in the range from 2.0 to 4.0 to obtain the single phase of Li 4 Ti 5 O 12 using Ti-sol(M-6). XRD patterns of the products are presented in Fig.…”

Section: The Effect Of Li/ti Molar Ratiomentioning

confidence: 99%

“…1), 2) In present commercial Li-ion batteries, graphite is a widely used as anode material, whereas it has some problems for the safety and rate performance required for the applications in HEV and EV. Spinel lithium titanate, Li 4 Ti 5 O 12 (LTO), has recently attracted great interest as an alternative anode material to graphite.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal synthesis of Li4Ti5O12 nanoparticles using a supercritical flow reaction system

Hayashi

Nakamura

Ebina

2014

J. Ceram. Soc. Japan

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The cubic Li 4 Ti 5 O 12 nanoparticles were continuously synthesized in supercritical water using a flow hydrothermal reaction system. Ti-sols(M-6, A-6) and Ti(SO 4 ) 2 were used as the Ti source. Initial Li/Ti molar ratio was varied with the LiOH concentrations. The syntheses were carried out at temperatures from 350 to 410°C, at pressure of 30 MPa, and for residence times from 10 to 26 s. X-ray diffraction (XRD), transmission electron microscopy (TEM), BET surface area, and Dynamic light scattering (DLS) technique were used to characterize the samples. Single phase of Li 4 Ti 5 O 12 was achieved under supercritical conditions at initial Li/Ti molar ratio >2.5 from Ti-sol(M-6) and >2 from Ti-sol(A-6), respectively, whereas single phase was not obtained from Ti(SO 4 ) 2 solution even at initial Li/Ti molar ratio of 10. It requires the pH range over 12 to prepare the single phase Li 4 Ti 5 O 12 . As-synthesized samples exhibited the diffuse scattering (111) and missing (311) reflections due to a disorder in TiO framework, whereas the presence of these two reflections indicates reordering of the Ti sublattice after annealing.

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Section: The Effect Of Li/ti Molar Ratiomentioning

confidence: 94%

Section: The Effect Of Li/ti Molar Ratiomentioning

confidence: 99%

Section: The Effect Of Li/ti Molar Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal synthesis of Li4Ti5O12 nanoparticles using a supercritical flow reaction system

Hayashi

Nakamura

Ebina

2014

J. Ceram. Soc. Japan

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show abstract

“…One strategy is to improve electron transfer by ion doping, surface modi cation, and/or incorporation of carbon [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] . The other approach is to reduce the electron and Li-ion diffusion lengths by producing nanostructured analogues of Li 4 Ti 5 O 12 itself [27][28][29][30][31] . Among these methods, ions doping can ef ciently improve the intrinsic conductivity of LTO, smaller particle size can shorten the Li-ion transfer route, thereby improving the rate performance.…”

Section: Introductionmentioning

confidence: 99%