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<p>Titanium dioxide (TiO<sub>2</sub>) has attracted widespread attention as a promising alternative anode for Li-ion batteries (LIBs) due to its low volume change, excellent operation safety, good discharge potential, green technology, and low cost. In this work, a TiO<sub>2</sub> film was created on a Ti substrate by a one-step micro-arc oxidation (MAO) technique in a phosphate-based electrolyte, and it is specifically utilized as a binder-free anode for LIBs. The battery performance demonstrated a high sustained capacity of 270 µAh/cm<sup>2</sup> at a current density of 50 µA/cm<sup>2</sup>, attributed to the porous morphology of the TiO₂ sample prepared at an optimized voltage, and excellent cycling stability over 200 cycles. Moreover, the capacity was restored to 90% of its initial capacity during cycling at a high current density of 500 µA/cm<sup>2</sup>, illustrating good rate capability. Overall, the porous structure of TiO₂, along with the channels and cavities generated during the MAO process, serves as penetration pathways for lithium ions and provides surface-active sites for electrochemical reactions. This study presents a high-performance, cost-effective approach to developing binder-free anodes for LIBs with superior performance.</p>

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Binder-free TiO2 anode electrodes by micro-arc oxidation for Li-ion battery

  • 期刊论文

  • 发表日期：

    2025年2月4日

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  • Afsane Rajabi,
  • Seyed Mohammad Mousavi Khoei,
  • Reza Riahifar,
  • Taieb Shahalizade

摘要

Titanium dioxide (TiO2) has attracted widespread attention as a promising alternative anode for Li-ion batteries (LIBs) due to its low volume change, excellent operation safety, good discharge potential, green technology, and low cost. In this work, a TiO2 film was created on a Ti substrate by a one-step micro-arc oxidation (MAO) technique in a phosphate-based electrolyte, and it is specifically utilized as a binder-free anode for LIBs. The battery performance demonstrated a high sustained capacity of 270 µAh/cm2 at a current density of 50 µA/cm2, attributed to the porous morphology of the TiO₂ sample prepared at an optimized voltage, and excellent cycling stability over 200 cycles. Moreover, the capacity was restored to 90% of its initial capacity during cycling at a high current density of 500 µA/cm2, illustrating good rate capability. Overall, the porous structure of TiO₂, along with the channels and cavities generated during the MAO process, serves as penetration pathways for lithium ions and provides surface-active sites for electrochemical reactions. This study presents a high-performance, cost-effective approach to developing binder-free anodes for LIBs with superior performance.