Synthesis of Li4Ti5O12-Sn by ultrasonic method as anode materials for lithium ion battery

1st Materials Research Society Indonesia Conference and Congress

Purwamargapratala, Y.^1 ; Sudaryanto, S.^1 ; Kartini, E.^1 ; Manawan, M.^2,3

Centre of Advanced Materials Science and Technology, National Nuclear Energy Agency, South Tangerang

15314, Indonesia^1

Energy Engineering, Politeknik Negeri Jakarta, Depok, Indonesia^2

Integrated Laboratory, Esa Unggul University, Jakarta, Indonesia^3

关键词: Cubic crystal structures;    Distilled water;    Electrical performance;    Homogeneous particle distribution;    Lithium hydroxide;    Lithium titanate;    Monoclinic crystal structure;    Ultrasonic methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/432/1/012062/pdf
DOI  :  10.1088/1757-899X/432/1/012062

来源: IOP

【 摘 要 】

Research on synthesis of Li4Ti5O12 has been carried out using ultrasonic method with the objective to study the influence of the Sn addition to the materials conductivity and structure of lithium titanate. The starting materials used were LiOH and TiO2, while Sn was used as an additive with percentages of 0, 5%, 10%, 15% and 20%. Lithium hydroxide, titanium dioxide, and Sn were mixed into an aquabidest media and stirred for two hours at a rate of 300 rpm. Then it was reacted with the help of ultrasound for two hours, filtered and washed with distilled water and then rinsed with acetone. After drying overnight at room temperature, the resulting powder material is compacted using a hydraulic press at a pressure of 4000 psi and the obtained pellets were sintered in the furnace at 800 °C for two hours. Characterization was performed using LCR meter and X-ray diffraction (XRD) to measure the conductivity and the crystal structure, respectively. The SEM-EDS are used to observe the morphology and the composition of the material. The results of the Rietveld analysis showed that the un-doped sample correspond to cubic crystal structure with space group of Fd-3m that belong to Li4Ti5O12 and monoclinic crystal structure with space group of C12/c1 that belong to Li2TiO3. It turned out that the increase of Sn; did not change in the ratio between Li4Ti5O12 and Li2TiO3, as well as in the lattices constant for all three phases. The optimum conductivity of 6.57 × 10-6 S/cm was obtained for 5 % Sn addition to Li4Ti5O12. A more homogeneous particle distribution was observed by SEM, due to ultrasonic method. It is concluded that the Sn addition to Li4Ti5O12 has improved structural and electrical performance of the anode materials for lithium ion battery.