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original research article

Al Ions Doping Effect on The Diffusion Coefficient and Capacity of Li4Ti5O12 (Lithium Titanate, LTO) in Lithium-Ion Battery Anode

Slamet Priyono 1 * , Lufthansyah Daniswara 1 , Rahma Alfia Khoiri 1 , Yayuk Astuti 1 , 2

1Research Center for Physics - Indonesian Institute of Sciences, Puspiptek, South Tangerang, Banten, Indonesia

2Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Semarang, Indonesia

3National Center for Sustainable Transportation Technology (NCSTT), Bandung, Indonesia

*Email: slam013@lipi.go.id

Li4Ti5O12 (LTO) anode doped with Al ions with varying concentrations (Al = 0; 0.005; 0.015; 0.03; 0.045) was successfully synthesized using the sol-gel method. Al-doped LTO samples were obtained through the sintering of gel at 850oC for 4 hours under a normal atmosphere. Electrochemical performance such as charge-discharge capacity and diffusion coefficient were characterized using an automatic battery cycler. The cells consist of electrode sheets (LTO doping Al) as a working electrode, lithium metal as the counter electrode, Celgard film as the separator, and LiPF6 as an electrolyte. Cyclic voltammetry test results show that a greater scan rate results in decreased capacity and greater polarization voltage. In addition, an increase in concentrations used in Al doping on LTO causes capacity, and the diffusion coefficient tends to decrease.

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