Korean Journal of Chemical Engineering, Vol.38, No.9, 1826-1833, 2021
Effects of Pluronic P123 addition and Cr3+ doping on electrochemical properties of Li4Ti5O12 anode for lithium ion batteries
Spinel Li4Ti5O12 is an attractive anode material for lithium ion batteries due to its stable electrochemical characteristics. However, its low electrical conductivity is regarded as a critical disadvantage for commercialization. The addition of P123 with Cr3+ doping enhanced the surface area and the electrical conductivity, which improved the electrochemical properties of Li4Ti5O12. As-prepared samples were analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, as well as BET and BJH analysis. Electrochemical properties were investigated by cyclic voltammetry, electrochemical impedance spectroscopy, powder conductivity measurement and cycle performance testing. P-Li4Ti4.95Cr0.05O12 showed excellent rate performance of 191, 189, 184, 175, 157, and 137 mAh/g at C-rates of 0.2, 0.5, 1, 2, 5, and 10 and high stable capacity retention of 147mAh/g at a C-rate of 10 after 300 cycles.
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