Enhanced electrochemical performance of La2O3-modified Li4Ti5O12 anode material for Li-ion batteries

2017 2nd International Seminar on Advances in Materials Science and Engineering

Wei, Aijia^1,2 ; Li, Wen^1,2 ; Zhang, Lihui^1,2 ; Liu, Zhenfa^1,2

Institute of Energy Resources, Hebei Academy of Science, Shijiazhuang Hebei

050081, China^1

Hebei Engineering Research Center for Water Saving in Industry, Shijiazhuang Hebei

050081, China^2

关键词: Anode material;    Charge capacities;    Coating layer;    Electrochemical performance;    Lattice structures;    Modification process;    Polymeric methods;    Structure and morphology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012082/pdf
DOI  :  10.1088/1757-899X/231/1/012082

来源: IOP

【 摘 要 】

1.0 wt.% La2O3-modified Li4Ti5O12sample is prosperous synthesized through a polymeric method followed by calcination at 500 °C for 5 hours in air. The 1.0 wt.% La2O3-modified Li4Ti5O12is characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) to confirm the structure and morphology. After the modification process, the lattice structure of Li4Ti5O12is not changed and a La2O3coating layer has formed on the Li4Ti5O12particles. The 1.0 wt.% La2O3-modified Li4Ti5O12exhibits a superior rate capacity, with charge capacity between 0 and 3 V of 235.2, 224.8, 214.1 202.2, 194.5 and 181.9 mAh g-1at rates of 0.2, 0.5, 1, 3, 5, and 10 C (1 C = 250 mAh g-1), respectively.