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Spinel Li4Ti5O12 (LTO) is a promising candidate for lithium-ion battery anodes because of its exceptional stability and safety. However, its extensive application is limited by a high comprehensive cost, poor electronic conductivity, and other inherent defects. This work presents a novel synthesis procedure to synthesize carbon-coated Fe-doped LTO composites through carbon reduction, in the presence of Fe-containing industrial H2TiO3 as the titanium source, and glucose as the carbon source. The presence of the Fe-dopant is confirmed through XRD, with Rietveld refinement and EDS experiments. Results show that Fe2+ replaces a portion of Ti4+ after doping, leading to an increase in the LTO cell parameters and the corresponding cell volume. FLTO/C, presents a capacity of 153.79 mAh g−1 at 10 C, and the capacity decay per cycle is only 0.0074% after 1000 cycles at 5 C. Moreover, EIS experiments indicate that the incorporation of Fe and carbon lowers the charge transfer resistance and improves the diffusion and migration of Li+. Notably, since this preparation process requires no additional Fe source as a raw material, it is simple, cost-effective, and suitable for large-scale production and further application. [ABSTRACT FROM AUTHOR]

A puissant specific capacity spherical Li4Ti5O12 anode material of Lithium-Ion battery was successfully synthesized by two methods include a high-temperature solid-phase method using solid phase lithium and titanium sources, and a sol-gel method with liquid phase lithium and titanium sources. The carbon coating modification of Li4Ti5O12 anode material was carried out by adding absorbent cotton during the reaction process, and the effect of absorbent cotton addition on the structure, morphology and electrochemical performance of Li4Ti5O12 was studied. The composite prepared by sol-gel represents a superior first discharge specific capacity of 173 mAh·g−1 at 0.2 C rates, approximately 68 mAh·g−1 at 10 C rates, and the capacity of sample remained 103 mAh·g−1 after 100 cycles of 1 C rate charge/discharge process. [ABSTRACT FROM AUTHOR]

lithium titanate (LTO), which has spinel structure, has become one of the most popular anode materials for lithium-ion batteries because of its high safety and stability. In this paper, industrial metatitanic acid and lithium hydroxide were used as the main raw materials to prepare nanotube LTO materials by two-step hydrothermal method. The effects of different titanium sources, stirring speed, hydrothermal reaction temperature and time, li-ti molar ratio and other process parameters on the phase, morphology and electrochemical properties of the samples were studied. The experimental results show that the nanotube LTO electrode material can be prepared by stirring at 300 rpm, reacting at a hydrothermal temperature of 170 °C for 20h, controlling the lithium titanium molar ratio of 0.85, and finally calcining; The specific capacity of nanotube LTO reaches 150mah/g at 10 C high magnification, and the capacity retention rate of 500 cycles is more than 92%. Compared with ordinary LTO materials, nanotube LTO has obvious performance advantages and excellent comprehensive electrochemical performance. [ABSTRACT FROM AUTHOR]

Spinel-type Li 4 Ti 5 O 12 (LTO) is known as a "zero-strain" material due to its negligible structural change during the charge/discharge process. However, high production cost and poor electrical conductivity limit the wide application of spinel-type LTO. Herein, a novel preparation process was developed to prepare a Li 4 Ti 5 O 12 /C–S composite using industrial H 2 TiO 3 as the titanium source. In the calcination process under a carbon reducing atmosphere, SO 4 2− adsorbed on industrial H 2 TiO 3 not only promotes the carbonization of glucose on the surface of LTO but also introduces S heteroatoms into the carbon coating layer in the form of C–S bonds through a series of reactions with glucose, which significantly improves the overall conductivity and the Li+ diffusion coefficient of the material. Therefore, the synthesized Li 4 Ti 5 O 12 /C–S composite exhibits excellent rate performance and cycling stability, with a specific capacity of 135.88 mAh g−1 even at 10C and a capacity decay rate of only 0.011% per cycle after 1000 cycles at 5C. This study delivers a novel method for the industrial production of LTO with both cost and performance advantages. [ABSTRACT FROM AUTHOR]

A high specific capacity spherical Li4Ti5O12 anode material of Lithium-Ion battery was successfully synthesized by a high-temperature solid-phase method consisting of ball milling, spray drying and calcination processes. Its suitable reaction conditions were explored by the orthogonal experiment method, and the effect of glucose addition on the morphology and electrochemical performance of Li4Ti5O12 was studied. The addition of glucose could change the surface structure of Li4Ti5O12, improve its conductivity, therefore enhance its electrochemical performance. The prepared lithium titanate represents a superior specific capacity of 163 mAh·g−1 at 0.2 C rates, approximately 65 mAh·g−1 under 10 C rates, and the capacity retention rate of sample remained 97.55% after 100 cycles of charging/discharging process. [ABSTRACT FROM AUTHOR]

Rechargeable lithium-ion batteries (LIBs), regarded as a promising power sources, have been widely applied in both electric vehicle and large stationary power supplies. As the most appealing potential anode material, Lithium titanate (Li4Ti5O12) used in LIBs offers the advantages of having negligible volume change, stable voltage plateau, relatively high theoretical capacity, high safety, and long operational life. However, a few shortages for Li4Ti5O12 battery applications are still remained, such as relatively low electronic conductivity and low tap density. Herein, an updated overview of the latest advances in Li4Ti5O12 research over the last 10 years is provided in in synthesis methods and modification methods for Li4Ti5O12-based anode materials. Additionally, recent progress of the synthesis of binder-free hybrid Li4Ti5O12 anodes for next-generation lithium-ion batteries is highlighted. Finally, future perspectives for further development of Li4Ti5O12-based electrodes also are pointed out from a scientific and an industrial point of view. [ABSTRACT FROM AUTHOR]

• Photo-assisted sol–gel route was developed to prepare nanostructured Li 4 Ti 5 O 12 anode. • UV irradiation process is effective to reduce grain size and modulate morphology. • Li 4 Ti 5 O 12 electrode treated with UV irradiation presents superb rate performance. Photo-assisted sol–gel route was developed to prepare nanostructured Li 4 Ti 5 O 12 anode materials. Resulting Li 4 Ti 5 O 12 powders were characterized by phase analysis, microscopic morphology observation, and cyclic charge/discharge tests. As lithium-ion battery electrode, synthesized Li 4 Ti 5 O 12 material by using the photo-assisted sol–gel route shows specific capacity of 120 mAh g−1 at 10C discharge rate. Furthermore, this material retains 98% of its initial specific capacity at 0.2C after 50 charge/discharge measurements. Outstanding rate capability and cycling stability of this Li 4 Ti 5 O 12 material are mainly derived from grain refinement induced by ultraviolet photo-irradiation. Therefore, this photo-assisted sol–gel route is attractive alternative method for preparing electrode materials for high-power lithium-ion battery applications. [ABSTRACT FROM AUTHOR]