Synthesis and electrochemical performance of nanoporous Li4Ti5O12 anode material for lithium-ion batteries

Shao, Dan; He, Jiarong; Luo, Ying; Liu, Wei; Yu, Xiaoyuan; Fang, Yueping

doi:10.1007/s10008-011-1604-4

Cited by 22 publications

(12 citation statements)

References 43 publications

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“…The values of charge transfer resistances R ct were 4.8 Ω, 4.3 Ω and 3.2 Ω, respectively. Exchange current densities can be found in the literature for the Li 4 Ti 5 O 12 material: j 0 = 5.9 × 10 −3 mA cm −2 [47] and j 0 = 2.38 × 10 −4 mA cm −2 [48]. However, a comparison of the present values with literature data is problematic because the real surface areas of electrodes were not reported.…”

Section: Impedance Studiesmentioning

confidence: 57%

Locust bean gum as green and water-soluble binder for LiFePO4 and Li4Ti5O12 electrodes

2020

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Locust Bean Gum (LBG, carob bean gum) was investigated as an environmentally friendly, natural, and water-soluble binder for cathode (LFP) and anode (LTO) in lithium-ion batteries (Li-ion). For the first time, we show LBG as an electrode binder and compare to those of the most popular aqueous (CMC) and conventional (PVDF) binders. The electrodes were characterized using TGA/DSC, the galvanostatic charge–discharge cycle test, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Thermal decomposition of LBG is seen to begin above 250 °C with a weight loss of about 60 wt% observed at 300 °C, which is sufficient to ensure stable performance of the electrode in a Li-ion battery. For CMC, weight loss at the same temperature is about 45%. Scanning electron microscopy (SEM) shows that the LFP–LBG system has a similar distribution of conductive carbon black particles to PVDF electrodes. The LTO–LBG electrode has a homogeneous dispersion of the electrode elements and maintains the electrical integrity of the network even after cycling, which leads to fast electron migration between LTO and carbon black particles, as well as ion conductivity between LTO active material and electrolyte, better than in systems with CMC and PVDF. The exchange current density, obtained from impedance spectroscopy fell within a broad range between 10−4 and 10−2 mA cm−2 for the LTO|Li and LFP|Li systems, respectively. The results presented in this paper indicate that LBG is a new promising material to serve as a binder. Graphic abstract

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Section: Impedance Studiesmentioning

confidence: 57%

Locust bean gum as green and water-soluble binder for LiFePO4 and Li4Ti5O12 electrodes

2020

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“…As shown in Figure 5, the capacity retention of Li 30 As shown in Figure 6(a), the rate capability of reduces to 100 mA g −1 , suggesting the all acquired samples have good intrinsic structure stability. 31 The corresponding charge-discharge curve of Li 2 Zn 0 9 Cu 0 1 Ti 3 O 8 is shown in Figure 6(b), from which the voltage gap between the charge and discharge plateaus widens obviously with the increasing current density. The rate capability is superior to those reported Li 2 ZnTi 3 O 8 electrode.…”

Section: Resultsmentioning

confidence: 98%

Cu-doped Li2 ZnTi3 O8 anode material with improved electrochemical performance for lithium-ion batteries

Qie¹,

Tang²

2014

Mat Express

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In this paper, Cu-doped Li 2 Zn 1−x Cu x Ti 3 O 8 (x = 0, 0.05, 0.1, 0.15) were successfully prepared using titanate nanowires as a precursor. The effects of Cu-doping on the physicochemical properties of Li 2 ZnTi 3 O 8 were extensively investigated by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), galvanostatic charge-discharge testing, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results show that the Li 2 Zn 1−x Cu x Ti 3 O 8 (x = 0, 0.05, 0.1, 0.15) compounds are pure well-crystallized spinel phase. In addition, the Cu-doping does not change the morphology and the electrochemical reaction process of Li 2 ZnTi 3 O 8 . Galvanostatic charge-discharge testing denotes that the Li 2 Zn 0.9 Cu 0.1 Ti 3 O 8 exhibits highest discharge capacity among all the samples and show higher cyclic stability and better rate capability compared with pristine Li 2 ZnTi 3 O 8 . When charge-discharge current density increases up to 1000 mA g −1 , the Li 2 Zn 0.9 Cu 0.1 Ti 3 O 8 sample still maintains a capacity of 165.4 mA h g −1 , while the pristine Li 2 ZnTi 3 O 8 sample shows severe capacity decline at same current density. CV result reveals that the Li 2 Zn 0.9 Cu 0.1 Ti 3 O 8 has the lowest polarization. It is shown by EIS that the Li 2 Zn 0.9 Cu 0.1 Ti 3 O 8 exhibits higher diffusion coefficient of Li + . The superior cycling performance and good rate capability, as well as simple synthesis route of the Cu-doped Li 2 ZnTi 3 O 8 are expected to show a potential commercial application.

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“…For instance, Wang et al reported that porous Li 4 Ti 5 O 12 nanofibers were produced with an average diameter of 230 nm, and they were composed of nanoparticles in an average diameter of ~47.5 nm, exhibiting values of 120 mAh g -1 in the reversible capability at rate of 10C at 1.0-2.0 V [86]. Furthermore, other forms of Li 4 Ti 5 O 12 , such as nanosheets and mesoporous hollow spheres, also exhibit high performance with a retention rate of over 90% [87,88]. Additionally, processing with a conductive carbon coating and surface nitridation is also shown to improve their performances [89,90].…”

Section: Titanium Oxide-based Materialsmentioning

confidence: 99%

Nanostructured Electrode Materials for Rechargeable Lithium-Ion Batteries

Zhao

Choi

Yoon

2020

J. Electrochem. Sci. Technol

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Today, rechargeable lithium-ion batteries are an essential portion of modern daily life. As a promising alternative to traditional energy storage systems, they possess various advantages. This review attempts to provide the reader with an indepth understanding of the working mechanisms, current technological progress, and scientific challenges for a wide variety of lithium-ion battery (LIB) electrode nanomaterials. Electrochemical thermodynamics and kinetics are the two main perspectives underlying our introduction, which aims to provide an informative foundation for the rational design of electrode materials. Moreover, both anode and cathode materials are clarified into several types, using some specific examples to demonstrate both their advantages and shortcomings, and some improvements are suggested as well. In addition, we summarize some recent research progress in the rational design and synthesis of nanostructured anode and cathode materials, together with their corresponding electrochemical performances. Based on all these discussions, potential directions for further development of LIBs are summarized and presented.

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Synthesis and electrochemical performance of nanoporous Li4Ti5O12 anode material for lithium-ion batteries

Cited by 22 publications

References 43 publications

Locust bean gum as green and water-soluble binder for LiFePO4 and Li4Ti5O12 electrodes

Locust bean gum as green and water-soluble binder for LiFePO4 and Li4Ti5O12 electrodes

Cu-doped Li<SUB>2</SUB> ZnTi<SUB>3</SUB> O<SUB>8</SUB> anode material with improved electrochemical performance for lithium-ion batteries

Nanostructured Electrode Materials for Rechargeable Lithium-Ion Batteries

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