Sol-Gel Synthesis of Nanocomposite Li₄Ti₅O₁₂/Carbon Nanotubes as Anode Materials for High-Rate Performance Lithium Ion Batteries

Abstract:

Abstract. Nanocomposite Li₄Ti₅O₁₂/carbon nanotubes (Li₄Ti₅O₁₂/CNTs) are facilely synthesized by a sol-gel method. The crystal structure and morphology of the nanocomposite Li₄Ti₅O₁₂/CNTs are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. CNTs play the important role just like a big network connecting the nanoparticles of Li₄Ti₅O₁₂, which provides a good channel for electronic conductivity and ion transport. Within the cut-off voltage between 1-2.4V, the initial discharge capacity of Li₄Ti₅O₁₂/CNTs material is 179.6 mAh/g at the rate of 0.1C. The capacity retentions are 95.5% and 90.6% of Li₄Ti₅O₁₂ with and without CNTs, respectively. At high current density of 10C, Li₄Ti₅O₁₂/CNTs delivers the initial capacity of 141.5 mAh/g, and without any capacity loss after charge/discharge 100 cycles. The matrix of CNTs plays important roles in increasing the conductivity and avoiding the aggregation of Li₄Ti₅O₁₂, which lead to high-rate capacity and cycling performance.

• Periodical: Advanced Materials Research (Volume 833)
• Pages: 45-49
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.833.45
• Online since: November 2013
• Authors: Xiao Wei Miao, Hong Ming He, Li Yi Shi, Xin Luo Zhao, Jian Hui Fang
• Keywords: Anode Materials, Cycling Performance, High-Rate Capacity, Li₄Ti₅O₁₂/Carbon Nanotubes

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