Novel Ag/Li4Ti5O12 binary composite anode electrodes for high capacity Li-ion batteries

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

doi:10.1016/j.surfcoat.2014.12.067

Cited by 16 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Deposition of high‐conductivity metals like Cu, Ag greatly enhances electronic conductivity and as improves high‐rate capability (Liu et al ., ; Cheng et al ., ). Silver additives have been tested on different electrode materials such as LiMn 2 O 4 (Son et al ., ; Tay et al ., ), LiCoO 2 (Huang et al ., ) and Li 4 Ti 5 O 12 (Erdas et al ., ). Their addition improved cycling stability and discharge capacity.…”

Section: Introductionmentioning

confidence: 97%

STEM study of Li₄Ti₅O₁₂ anode material modified with Ag nanoparticles

Andrzejczuk

Roguska

Michalska

et al. 2016

Journal of Microscopy

View full text Add to dashboard Cite

Comprehensive scanning transmission electron microscopy (STEM) analysis of Li4 Ti5 O12 (LTO) powder modified by deposited Ag nanoparticles was performed. Nanocomposite powders with Ag content of 1 wt.%, 4 wt.%, 10 wt.% were fabricated in a chemical process from suspensions of Ag and LTO. Apart from the STEM results, the presence of pure silver on the surface of the ceramic powder was confirmed by XRD and XPS analyses. The silver particles deposited on the LTO particles were characterized using the EDS mapping technique. The quantified results of the EDS mapping showed a relatively homogenous distribution of silver nanoparticles on the powder surface for every metal content. The mean diameter of the nanoparticles deposited on the LTO powder was about 4 nm in all cases. An increase in the Ag content during chemical surface modification did not cause changes in the microstructure. Focusing on an analysis of the metallic nanoparticles on the ceramic powder, electron tomography was used as an investigative technique. A very precise analysis of three-dimensional nanostructures is desirable for a comprehensive analysis of complex materials. The quantified analysis of the Ag nanoparticles visualized using electron tomography confirmed the results of the size measurements taken from the two-dimensional EDS maps.

show abstract

Section: Introductionmentioning

confidence: 97%

STEM study of Li₄Ti₅O₁₂ anode material modified with Ag nanoparticles

Andrzejczuk

Roguska

Michalska

et al. 2016

Journal of Microscopy

View full text Add to dashboard Cite

show abstract

“…8 Also, the bulk density of Li 4 Ti 5 O 12 is 3.42 g cm À3 , which is much higher than that of graphite (2.25 g cm À3 ) at 25 C. However, the small theoretical capacity of 175 mA h g À1 and high intercalation potential may prevent it from been widely used in large scale energy storage devices. 8 Also, the bulk density of Li 4 Ti 5 O 12 is 3.42 g cm À3 , which is much higher than that of graphite (2.25 g cm À3 ) at 25 C. However, the small theoretical capacity of 175 mA h g À1 and high intercalation potential may prevent it from been widely used in large scale energy storage devices.…”

Section: Introductionmentioning

confidence: 99%

“…8 As a LIBs anode, the lithium insertion/deinsertion reaction for Li 2 ZnTi 3 O 8 can be summarized as: Li 2 ZnTi 3 O 8 + 3Li + + 3e À 4 Li 5 ZnTi 3 O 8 (1) 8 As a LIBs anode, the lithium insertion/deinsertion reaction for Li 2 ZnTi 3 O 8 can be summarized as: Li 2 ZnTi 3 O 8 + 3Li + + 3e À 4 Li 5 ZnTi 3 O 8 (1)…”

Section: Introductionmentioning

confidence: 99%

Synthesis and high cycle performance of Li₂ZnTi₃O₈/C anode material promoted by asphalt as a carbon precursor

et al. 2016

View full text Add to dashboard Cite

O 8 /C composites were synthesized by a solid-state method with asphalt as a carbon source. The effect of carbon content on the structure, morphology and electrochemical properties was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy (RS), galvanostatic charge-discharge and AC impedance spectroscopy. SEM images show that the as-prepared Li 2 ZnTi 3 O 8 /C phase was agglomerated with a primary particle size of ca. 30 nm. TEM images reveal that a homogeneous carbon layer (ca. 3 nm) formed on the surface of Li 2 ZnTi 3 O 8 particles which are favorable to improve the electronic conductivity and inhibit the growth of Li 2 ZnTi 3 O 8 particles during the annealing process. Electrochemical measurements demonstrate that the as-prepared Li 2 ZnTi 3 O 8 /C composite with 9.9 wt% carbon possesses a high initial discharge capacity of 393 mA h g À1 , 191 mA h g À1 at 0.1 A g À1 and 1 A g À1 , respectively. In addition, after 100 cycles at a high current density of 1 A g À1 , a discharge capacity of 191 mA h g À1 is obtained (99.5% of its initial value).

show abstract

“…They are light weight; have a small size, high voltage and high energy density; and have been attracting intense interest as an electrochemical energy storage device to reduce exhaust emissions and for fuel economy [1,2]. However, the price of lithium precursors, safety and life issues, and low power density are obstacles for the application of LIBs for largescale energy storage in the future [3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Spherical Silver-coated Li4Ti5O12 Anode Material by a Sol-Gel-assisted Hydrothermal Method

Huang

et al. 2017

Nanoscale Res Lett

View full text Add to dashboard Cite

Ag-coated spherical Li 4 Ti 5 O 12 composite was successfully synthesized via a sol-gel-assisted hydrothermal method using an ethylene glycol and silver nitrate mixture as the precursor, and the influence of the Ag coating contents on the electrochemical properties of its was extensively investigated. X-ray diffraction (XRD) analysis indicated that the Ag coating does not change the spinel structure of Li 4 Ti 5 O 12 . The electrochemical impedance spectroscopy (EIS) analyses demonstrated that the excellent electrical conductivity of the Li 4 Ti 5 O 12 /Ag resulted from the presence of the highly conducting silver coating layer. Additionally, the nano-thick silver layer, which was uniformly coated on the particles, significantly improved this material's rate capability. As a consequence, the silver-coated micron-sized spherial Li 4 Ti 5 O 12 exhibited excellent electrochemical performance. Thus, with an appropriate silver content of 5 wt.%, the Li 4 Ti 5 O 12 /Ag delivered the highest capacity of 186.34 mAh g −1 at 0.5C, which is higher than that of other samples, and maintained 92.69% of its initial capacity at 5C after 100 cycles. Even at 10C after 100 cycles, it still had a capacity retention of 89.17%, demonstrating remarkable cycling stability. via a sol-gel-assisted hydrothermal method using ethylene glycol and a silver nitrate mixture as the precursor for the coating layer, which significantly improved the electronic conductivity and the electrochemical performance of Li 4 Ti 5 O 12 . 2. The spherical morphology could induce a large tap density and consequently enhance the volumetric energy density.

show abstract

Novel Ag/Li4Ti5O12 binary composite anode electrodes for high capacity Li-ion batteries

Cited by 16 publications

References 34 publications

STEM study of Li₄Ti₅O₁₂ anode material modified with Ag nanoparticles

STEM study of Li₄Ti₅O₁₂ anode material modified with Ag nanoparticles

Synthesis and high cycle performance of Li₂ZnTi₃O₈/C anode material promoted by asphalt as a carbon precursor

Synthesis of Spherical Silver-coated Li4Ti5O12 Anode Material by a Sol-Gel-assisted Hydrothermal Method

Contact Info

Product

Resources

About

Novel Ag/Li4Ti5O12 binary composite anode electrodes for high capacity Li-ion batteries

Cited by 16 publications

References 34 publications

STEM study of Li4Ti5O12 anode material modified with Ag nanoparticles

STEM study of Li4Ti5O12 anode material modified with Ag nanoparticles

Synthesis and high cycle performance of Li2ZnTi3O8/C anode material promoted by asphalt as a carbon precursor

Synthesis of Spherical Silver-coated Li4Ti5O12 Anode Material by a Sol-Gel-assisted Hydrothermal Method

Contact Info

Product

Resources

About

STEM study of Li₄Ti₅O₁₂ anode material modified with Ag nanoparticles

STEM study of Li₄Ti₅O₁₂ anode material modified with Ag nanoparticles

Synthesis and high cycle performance of Li₂ZnTi₃O₈/C anode material promoted by asphalt as a carbon precursor