First-Principles Studies on Transition Metal Doped Mo2B2 as Anode Material for Li-Ion Batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Two-dimensional (2D) transition-metal borides are emerging as promising electrode materials for lithium-ion batteries (LIBs).
• Molybdenum boride (Mo2B2) possesses intrinsic metallic properties beneficial for electrochemical applications.
• Optimizing electrode materials is crucial for advancing LIB performance.

Purpose of the Study:

• To investigate the effect of transition metal (TM) doping on the properties of 2D molybdenum boride (Mo2B2).
• To evaluate the potential of TM-doped Mo2B2 as an electrode material for LIBs.
• To identify specific TM dopants that enhance electrochemical performance.

Main Methods:

• Computational investigation of 2D Mo2B2 doped with various transition metals (Mn, Fe, Co, Ni, Ru, Pt).
• Analysis of electronic conductivity and lithium diffusion energy barriers.
• Comparison of doped materials with pristine Mo2B2.

Main Results:

• All investigated TM-doped Mo2B2 samples exhibited excellent electronic conductivity.
• TM doping significantly reduced lithium diffusion energy barriers compared to pristine Mo2B2.
• 2D Co-doped Mo2B2 showed the lowest diffusion energy barriers (0.14 eV and 0.11 eV), indicating enhanced Li+ mobility.

Conclusions:

• Transition metal doping effectively enhances the electrochemical performance of 2D Mo2B2 for LIBs.
• Cobalt-doped Mo2B2 is identified as a highly promising electrode material for next-generation LIBs.
• This research provides valuable insights for designing advanced electrode materials.