Preparation and electrochemical performance of Ag doped Li4Ti5O12

Huang, Sha‐Hua; Zhang, Wen; Zhu, Xiujian; Gu, Zhonghua

doi:10.1016/j.elecom.2004.08.013

Cited by 235 publications

(93 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another important approach to achieve better battery performance is to modify 782,794 . From the compilation of the areal capacity for various modified anodic TiO 2 nanotubes (Figure 38), it is evident that different modification techniques lead to much higher areal capacity than bare TiO 2 anodic nanotubes.…”

Section: Li-ion Batteriesmentioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

View full text Add to dashboard Cite

show abstract

Section: Li-ion Batteriesmentioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

View full text Add to dashboard Cite

show abstract

“…Several approaches to increase the conductivity of LTO by substituting different atoms for Li + , Ti 4+ or O 2-sites in order to generate Ti 3+ /Ti 4+ mixed state have been introduced [4]. For example doping with small amounts of Mg [2,5], Ag [6], and Zn [7] atoms has been reported to increase the conductivity and thus performance of LTO. Common methods to increase the conductivity also include carbon coating of LTO [8][9][10][11], and formation of composite materials of LTO and some highly conductive carbonaceous materials such as carbon nanotubes (CNT) [12].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Pohjalainen

Kallioinen²,

Kallio

2015

Journal of Power Sources

View full text Add to dashboard Cite

Traditionally electrodes for lithium ion batteries are manufactured using carbon additives to increase the conductivity. However, in case of lithium titanate, Li4Ti5O12 (LTO), carbon free electrodes have gathered some interest lately. Therefore two LTO materials synthetized using the same synthesis but different end milling process resulting in materials with different particle size and surface area are compared here using electrodes manufactured with and without carbon additives. Both LTO samples (LTO-SP with small primary particle size and high surface area, and LTO-LP with larger primary particle size and small surface area) produce similar capacities and voltages with or without carbon additives at low C-rates at the room temperature. However, at high C-rates and/or sub-zero temperatures electrodes with carbon additives produce higher capacities and smaller ohmic losses and this behavior is more pronounced for the LTO electrodes with smaller primary particle size and larger surface area. These results show that the feasibility of carbon free LTO electrodes depends on the properties of LTO affecting the morphology of the electrode and consequently, the transport properties. This is most pronounced under conditions where electron and Li + ion transfer become limiting (high C-rates and low temperature).

show abstract

“…Due to the poor electronic conductivity and sluggish Li + diffusion, the material exhibits a large polarization at high charge/ discharge rates. The highly conductive Ag additive can significantly enhance the surface intercalation reaction and reduce the polarization [20,22]. Even the highest Ag content (7 wt.%) can provide the longest voltage plateau, and the metal silver itself cannot be fully intercalated into the lithium.…”

Section: Electrochemical Propertiesmentioning

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

Preparation and electrochemical performance of Ag doped Li4Ti5O12

Cited by 235 publications

References 16 publications

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

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

Contact Info

Product

Resources

About