Citation: Long-Jiao Chang, Shao-Hua Luo, Hai-Liang Zhang, Xi-Wei Qi, Zhi-Yuan Wang, Yan-Guo Liu, Yu-Chun Zhai. Synthesis and performance of Li₄Ti₅O₁₂ anode materials using the PVP-assisted combustion method[J]. Chinese Chemical Letters, ;2014, 25(12): 1569-1572. doi: 10.1016/j.cclet.2014.09.002 shu

Synthesis and performance of Li₄Ti₅O₁₂ anode materials using the PVP-assisted combustion method

Long-Jiao Chang ^a,c ,
Shao-Hua Luo ^b,c,, ,
Hai-Liang Zhang ^a,c ,
Xi-Wei Qi ^b,c ,
Zhi-Yuan Wang ^b,c ,
Yan-Guo Liu ^b,c ,
Yu-Chun Zhai ^a

a.
a. School of Materials and Metallurgy Northeastern University, Shenyang 110819, China;
b.
b. School of Resources and Materials, Northeastern University at Qinghuangdao Branch, Qinghuangdao 066004, China;
c.
c. Hebei Provincial Laboratory of Dielectric and Electrolyte Functionals Materials, Qinghuangdao 066004, China

Corresponding author: Shao-Hua Luo,
Received Date: 11 July 2014
Available Online: 29 August 2014
Fund Project: This work was supported by the National Natural Science Foundation of China (No. 51374056) (No. 51374056) Natural Science Foundation of Hebei Province (No. E2013501135) (Ⅱ) program for New Century Excellent Talents in University (No. NCET-10-0304) (No. E2013501135) The Special Fund for Basic Scientific Research of Central Colleges, Northeastern University (Nos. N100123003 and N120523001). (No. NCET-10-0304)

Li₄Ti₅O₁₂ was synthesized by a facile gel-combustion method (GCM) with polyvinylpyrrolidone (PVP) as the polymer chelating agent and fuel. The structural and electrochemical properties of the sample were compared with the one prepared by the conventional solid-state reaction (SSR) through X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), charge-discharge measurements, and electrochemical impedance spectroscopy (EIS), respectively. The sub-microscale Li₄Ti₅O₁₂ oxides, with a high phase purity and good stoichiometry, can be obtained by annealing at 800 ℃. The grain size is smaller than that of the samples that were power prepared by SSR. Lithium-ion batteries with a GCM Li₄Ti₅O₁₂ anode exhibit excellent reversible capacities of 167.6, 160.7, 152.9, and 144.2 mAh/g, at the current densities of 0.5 C, 1 C, 3 C and 5 C, respectively. The excellent cycling and rate performance can be attributed to the smaller particle size, lower charge-transfer resistance and larger lithium ion diffusion coefficient. It is therefore concluded that GCM Li₄Ti₅O₁₂ is a promising candidate for applications in highrate lithium ion batteries.
- Lithium ion battery,
- Lithium titanate,
- Combustion synthesis,
- Polyvinylpyrrolidone
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Synthesis and performance of Li₄Ti₅O₁₂ anode materials using the PVP-assisted combustion method