Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Zhou, Taotao; Feng, Xuyong; Guo, Xin; Wu, Wentao; Cheng, Sheng; Xiang, Hongfa

doi:10.1016/j.electacta.2015.06.021

Cited by 55 publications

(27 citation statements)

References 32 publications

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“…42 The diffraction patterns were recorded from 10° to 70° (2θ) at room temperature. Their morphologies and particle sizes were 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 8 The measurements of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed with a CHI 660D electrochemical workstation (Shanghai Chenhua Co.), at a scan rate of 0.1 mV s -1 from 1 V to 2.5 V and a frequency range from 0.1 Hz to 10 5 Hz.…”

Section: Methodsmentioning

confidence: 99%

Ultrathin Li₄Ti₅O₁₂ Nanosheets as Anode Materials for Lithium and Sodium Storage

Feng

Zou

Xiang

et al. 2016

ACS Appl. Mater. Interfaces

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Ultrathin Li4Ti5O12 (LTO) nanosheets with ordered microstructures were prepared via a polyether-assisted hydrothermal process. Pluronic P123, a polyether, can impede the growth of Li2TiO3 in the precursor and also act as a structure-directing agent to facilitate the (Li1.81H0.19)Ti2O5·2H2O precursor to form the LTO nanosheets with the ordered microstructure. Moreover, the addition of P123 can suppress the stacking of LTO nanosheets during calcining of the precursor, and the thickness of the nanosheets can be controlled to be about 4 nm. The microstructure of the as-prepared ultrathin and ordered nanosheets is helpful for Li(+) or Na(+) diffusion and charge transfer through the particles. Therefore, the ultrathin P123-assisted LTO (P-LTO) nanosheets show a rate capability much higher than that of the LTO sample without P123 in a Li battery with over 130 mAh g(-1) of capacity remaining at the 64C rate. For intercalation of larger size Na(+) ions, the P-LTO still exhibits a capacity of 115 mAh g(-1) at a current rate of 10 C and a capacity retention of 96% after 400 cycles.

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Section: Methodsmentioning

confidence: 99%

Ultrathin Li₄Ti₅O₁₂ Nanosheets as Anode Materials for Lithium and Sodium Storage

Feng

Zou

Xiang

et al. 2016

ACS Appl. Mater. Interfaces

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“…Ce-doped LTO nanocomposites were prepared using a similar method to previous reports [6,30,39]. The procedure was as follows: Three milliliters of tetrabutyltitanate (Tianjin Kermel analytical reagent Co., Tianjin, China), 0.015 g of CeCl 3 ·7H 2 O (Alfa-Aesar Chemicals Co., Shanghai, China), and 0.41 g of LiOH·H 2 O (Sinopharm Chemical Reagent Co., Shanghai, China) were mixed in 20 mL of ethanol at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Heteroatom doping of electrode materials has been provided a valid way for enhancing its intrinsic electronic and ionic conductivity according to previous reports [24,25,26,27]. For example, rare earth doping of Ce is able to improve cycling performance as well as rate performance due to the special electronic structure (a half full 4f electron shell) for of the rare earth metal [28,29,30]. It is reported that spherical La-doped LTO prepared by solid state synthesis displays good cycling performance compared to un-doped LTO; however, the rate performance can be further improved.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Ce- and La-Doped Li4Ti5O12 Nanosheets and Their Electrochemical Performance in Li Half Cell and Li4Ti5O12/LiFePO4 Full Cell Batteries

Qin

2017

Nanomaterials

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This work reports on the synthesis of rare earth-doped Li4Ti5O12 nanosheets with high electrochemical performance as anode material both in Li half and Li4Ti5O12/LiFePO4 full cell batteries. Through the combination of decreasing the particle size and doping by rare earth atoms (Ce and La), Ce and La doped Li4Ti5O12 nanosheets show the excellent electrochemical performance in terms of high specific capacity, good cycling stability and excellent rate performance in half cells. Notably, the Ce-doped Li4Ti5O12 shows good electrochemical performance as anode in a full cell which LiFePO4 was used as cathode. The superior electrochemical performance can be attributed to doping as well as the nanosized particle, which facilitates transportation of the lithium ion and electron transportation. This research shows that the rare earth doped Li4Ti5O12 nanosheets can be suitable as a high rate performance anode material in lithium-ion batteries.

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“…At first, ammonium molybdate and cerium nitrate were used as precursors to form uniform composite nanofibers. During the calcination process, due to the Ostwald effect, larger CeO 2 particles engulfed smaller particles to form a skeleton, which further encapsulated the MoO 3 particles. The following dopamine (PDA) coating and carbonizing processes would improve greatly both the strength of the composite nanotube and the conductivity of the composite nanotube.…”

Section: Introductionmentioning

confidence: 99%

Template‐Free Synthesis of Hierarchical Composite Nanotubes with Superior Lithium and Sodium Storage Performance

et al. 2020

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2D transition metal disulfides are one of the most preferred materials for lithium‐/sodium‐ion batteries (LIBs). However, complex processes and structural instability during cycling are challenges faced. Herein, the hierarchical composite nanotubes CeO2@C@MoS2 (MS/CNTs) are prepared by electrostatic spinning, followed by a simple carbon coating method. The as‐prepared composite nanotubes with self‐assembled layer structures are characterized by a more stable structure compared with traditional nanofibers due to the existence of a dense skeleton. As a result of the stable framework structure, MS/CNTs exhibit excellent electrochemical performance in LIBs (1002 mA hg−1 at 0.1 A g−1 and 690 mA hg−1 at 1 A g−1 after 500 cycles) and super‐long cyclic stability and electrochemical performance (550 mA hg−1 at 2 A g−1 after 2400 cycles). MS/CNTs also show excellent storage performance in sodium batteries (440 mA hg−1 at 0.5 A g−1, 400 mA hg−1 at 1 A g−1). The stability of MoS2 nanotubes is effectively improved by chemical and physical methods, mainly due to the support of the CeO2@C, metal–organic framework (MOF) tube skeleton, which avoids the shedding of nanotubes after cycling, maintaining a unique structural topography even after 500 cycles.

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Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Cited by 55 publications

References 32 publications

Ultrathin Li₄Ti₅O₁₂ Nanosheets as Anode Materials for Lithium and Sodium Storage

Ultrathin Li₄Ti₅O₁₂ Nanosheets as Anode Materials for Lithium and Sodium Storage

Preparation of Ce- and La-Doped Li4Ti5O12 Nanosheets and Their Electrochemical Performance in Li Half Cell and Li4Ti5O12/LiFePO4 Full Cell Batteries

Template‐Free Synthesis of Hierarchical Composite Nanotubes with Superior Lithium and Sodium Storage Performance

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Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Cited by 55 publications

References 32 publications

Ultrathin Li4Ti5O12 Nanosheets as Anode Materials for Lithium and Sodium Storage

Ultrathin Li4Ti5O12 Nanosheets as Anode Materials for Lithium and Sodium Storage

Preparation of Ce- and La-Doped Li4Ti5O12 Nanosheets and Their Electrochemical Performance in Li Half Cell and Li4Ti5O12/LiFePO4 Full Cell Batteries

Template‐Free Synthesis of Hierarchical Composite Nanotubes with Superior Lithium and Sodium Storage Performance

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Ultrathin Li₄Ti₅O₁₂ Nanosheets as Anode Materials for Lithium and Sodium Storage

Ultrathin Li₄Ti₅O₁₂ Nanosheets as Anode Materials for Lithium and Sodium Storage