Preparation and characterization of spinel Li4Ti5O12 nanoparticles anode materials for lithium ion battery

Authors

Hongli Wu, Xinjiang University
Yudai Huang, Xinjiang University
Dianzeng Jia, Key Laboratory of Advanced Functional Materials of Autonomous Region
Zaiping Guo, University of WollongongFollow
Ming Miao, Xinjiang Cancer Institute & Hospital, China

RIS ID

53020

Publication Details

Wu, H, Huang, Y, Jia, D, Guo, Z & Miao, M (2012), Preparation and characterization of spinel Li4Ti5O12 nanoparticles anode materials for lithium ion battery, Journal of Nanoparticle Research, 14(1), pp. 1-7.

Abstract

Spinel Li₄Ti₅O₁₂ nanoparticles were prepared via a high-temperature solid-state reaction by adding the prepared cellulose to an aqueous dispersion of lithium salts and titanium dioxide. The precursors of Li₄Ti₅O₁₂ were characterized by thermogravimetry and differential scanning calorimetry. The obtained Li₄Ti₅O₁₂ nanoparticles were characterized using X-ray diffraction, transmission electron microscopy (TEM) and electrochemical measurements. The TEM revealed that the Li₄Ti₅O₁₂ prepared with cellulose is composed of nanoparticles with an average particle diameter of 20–30 nm. Galvanostatic battery testing showed that nano-sized Li₄Ti₅O₁₂ exhibit better electrochemical properties than submicro-sized Li₄Ti₅O₁₂ do especially at high current rates, which can deliver a reversible discharge capacity of 131 mAh g⁻¹ at the rate of 10 C, whereas that of the submicro-sized sample decreases to 25 mAh g⁻¹ at the same rate (10 C). Its reversible capacity is maintained at ~172.2 mAh g⁻¹ with the voltage range 1.0–3.0 V (vs. Li) at the current rate of 0.5 C for over 80 cycles.