Heating Effect on Manufacturing Li4Ti5O12 Electrode Sheet with PTFE Binder on Battery Cell Performance

5th International Conference on Advanced Materials Sciences and Technology

Priyono, S.^1 ; Lubis, B.M.^2 ; Humaidi, S.^2 ; Prihandoko, B.^1

Research Center for Physics, Indonesian Institute of Sciences Kawasan PUSPIPTEK, Gedung 442, Serpong, Tangerang Selatan, Banten

15314, Indonesia^1

Department of Physics, Faculty of Mathematics and Natural Sciences, University of North Sumatera, Kampus USU Medan, Jl. Bioteknologi I, 20155, Indonesia^2

关键词: Charge discharge tests;    Cubic crystal structures;    Electrochemical performance;    High temperature furnaces;    Increasing temperatures;    Manufacturing process;    Sintering temperatures;    TiO2;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/367/1/012007/pdf
DOI  :  10.1088/1757-899X/367/1/012007

来源: IOP

【 摘 要 】

The synthesis of Li4Ti5O12(LTO) and study of the heating effect on the manufacturing process of LTO sheet on the electrochemical performance have been investigated. LTO anode material composed with LiOH.H2O, TiO2as raw materials were synthesized by the solid-state process. All raw materials were stoichiometrically mixed and milled with a planetary ball mill for 4 h to become the precursor of LTO. The precursor was characterized by Simultaneous Thermal Analyzer (STA) to determine sintering temperature. The STA analysis revealed that the minimum temperature to sinter the precursor was 600 °C. The precursor was sintered by using high-temperature furnace at 900 °C for 2 h in air atmosphere. The final product was ground and sieved with a screen to get finer and more homogenous particles. The final product was characterized by X-ray Diffraction (XRD) to determined crystal structure and phases. LTO sheet was prepared by mixing LTO powders with PTFE and AB in ratio 85:10:5 wt% by varrying heating process with 40 °C, 50 °C and 70 °C to become slurry. The slurry was coated on Cu foil with doctor blade method and dried at 80 °C for 1 h. LTO sheet was characterized by FTIR to analyze functional groups. LTO sheet was cut into circular discs with 16 mm in diameter. LTO sheet was arranged with a separator, metallic lithium and electrolyte become coin cell in a glove box. Automatic battery cycler was used to measure electrochemical performance and specific capacity of the cell. From the XRD analysis showed that single phase of LTO phase with a cubic crystal structure is formed. FTIR testing showed that there are stretching vibrations of Ti-O and H-F from tetrahedral TiO6and PTFE respectively. Increasing temperature on LTO sheet manufacturing doesn't change the structure of LTO. Cyclic voltammetry analysis showed that sample with heating of 40 °C showed better redox process than others. Charge-discharge test also showed that sample with heating of 40 °C has higher specific capacity than other samples with 53 mAh•g-1.