Studies of Mg-Substituted Li[sub 4−x]Mg[sub x]Ti[sub 5]O[sub 12] Spinel Electrodes (0≤x≤1) for Lithium Batteries

Chen, C. H.; Vaughey, John T.; Jansen, Andrew N.; Dees, Dennis W.; Kahaian, Arthur J.; Goacher, T.; Thackeray, Michael M.

doi:10.1149/1.1344523

Cited by 459 publications

(252 citation statements)

References 10 publications

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“…) limits the charge-discharge rate 9 although LTO has the advantage of safety. To overcome the low electric conductivity of LTO, many effective approaches have been introduced, including conductive material (such as Ag, 10 carbon, 11 etc.)…”

Section: ¹1mentioning

confidence: 99%

Influence of the Carbon Source on the Surface and Electrochemical Characteristics of Lithium Excess Li4.3Ti5O12 Carbon Composite

et al. 2012

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We have investigated the preparation and electrochemical characteristics of a lithium excess Li 4.3 Ti 5 O 12 carbon composite (Li 4.3 Ti 5 O 12 /C) with different carbon sources (polyacryl acid, polyvinyl alcohol, and carboxy methyl cellulose sodium). We have prepared the lithium excess Li 4.3 Ti 5 O 12 /C by a spray-drying method followed by calcining at 800°C in a nitrogen atmosphere. The TEM observations indicated that the surface of the Li 4.3 Ti 5 O 12 /C particle was clearly covered with an amorphous carbon layer. The Li 4.3 Ti 5 O 12 /C materials employing polyvinyl alcohol as the carbon source showed the best rate performance with the highest discharge capacity of 117 mAh (g-Li 4.3 Ti 5 O 12 /C) −1 at the 10C rate.

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Section: ¹1mentioning

confidence: 99%

Influence of the Carbon Source on the Surface and Electrochemical Characteristics of Lithium Excess Li4.3Ti5O12 Carbon Composite

et al. 2012

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“…Numerous strategies, including crystallite size reduction [10], doping with high valence metal ions [11][12][13], and coating with conducting phases [14][15][16][17], have been adopted to improve the discharge/charge transport properties of electrodes. In addition, another way to enhance the electronic conductivity is to synthesize nanostructured Li 4 Ti 5 O 12 .…”

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

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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.

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“…However, the low electric conductivity of LTO (approximately 10 ¹13 S cm ¹1 ) 5,6) requires small-size LTO particles to exploit its intrinsic properties. Therefore, the size reduction of LTO has been substantially investigated.…”

Section: Introductionmentioning

confidence: 99%

Ion-Exchange Synthesis of Li4Ti5O12 Nanotubes and Nanoparticles for High-Rate Li-Ion Batteries

et al. 2016

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A synthesis process of spinel Li 4 Ti 5 O 12 (LTO) nanomaterials was investigated using Li + -exchanged titanate nanotubes obtained via hydrothermal synthesis and subsequent reflux treatment. The substituted amount of Li + ions can be controlled by the temperature and time during the reflux treatment in a LiOH aqueous solution, which is the key for the synthesis of single-phase LTO. The rate capability of nanosized LTO as an active material for Li-ion batteries is significantly higher than that of microsized LTO obtained via conventional solid-state synthesis. By changing the intercalated ions during the reflux treatment, this synthesis process can also be applied to the synthesis of other titanate nanomaterials, which are promising active materials for future battery systems.

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Studies of Mg-Substituted Li[sub 4−x]Mg[sub x]Ti[sub 5]O[sub 12] Spinel Electrodes (0≤x≤1) for Lithium Batteries

Cited by 459 publications

References 10 publications

Influence of the Carbon Source on the Surface and Electrochemical Characteristics of Lithium Excess Li4.3Ti5O12 Carbon Composite

Influence of the Carbon Source on the Surface and Electrochemical Characteristics of Lithium Excess Li4.3Ti5O12 Carbon Composite

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

Ion-Exchange Synthesis of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> Nanotubes and Nanoparticles for High-Rate Li-Ion Batteries

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