Exploring the electrochemical properties of Cu-substituted Li2CoTi3O8 as anode material for lithium-ion batteries

Motaz G Fayed1,2, Saad G Mohamed2, Yosry F Barakat2, E E El-Shereafy1, M M Rashad3
1Chemistry Department, El-Menoufia University, Shebin El-Kom, Egypt
2Mining and Metallurgy Engineering Department, Tabbin Institute for Metallurgical Studies, Cairo, Egypt
3Electronic & Magnetic Materials Department, Advanced Materials Institute, Central Metallurgical Research and Development Institute (CMRDI), Cairo, Egypt

Tóm tắt

Spinel Li2Co1–xCuxTi3O8 nanopowders (x = 0, 0.25, 0.5 molar ratios) were synthesized via a sol–gel auto-combustion scheme. The preparation conditions like annealing temperature, Cu2+ ion substituted on the crystallinity, microstructure and chemical composition were inspected using X-ray diffraction, X-rays photoelectron spectroscopy and field emission scanning electron microscopy. Furthermore, the electrochemical performance of the Li2Co0.75Cu0.25Ti3O8 electrode towards the Li-ion battery was inspected via potentiodynamic cyclic voltammetry experiment, galvanostatic charge/discharge tests and electrochemical impedance spectroscopy. Li2Co0.75Cu0.25Ti3O8 electrode exhibited a good reversible charge–discharge capacity with a primary discharge capacity of 527 mAh g−1 and excellent cycling stability of 98.75% coulombic efficiency.

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