text: Yo, check it out, I got a mission to pursue,
  Investigatin' lithium intercalation, it's somethin' new.
  In the crystal structure of Nb2O2F3, let's delve,
  Using density functional theory, man, it's gonna be swell.
  
  We apply the generalized gradient approximation,
  With the hybrid functional method, no hesitation.
  Lithium atoms in this compound, they infiltrate,
  Maximum concentration, one Li per formula, straight.
  
  LiNb2O2F3, that's the product that we get,
  Occupying octahedral positions, you can bet.
  In between the layers of Nb-O-F, they reside,
  Structural volume expands, only 5%, no need to hide.
  
  Electronic structure evolves, it's a sight to see,
  From semiconductor to metal, it sets free.
  When half the lithium atoms join the scene,
  Symmetry breaks, Nb2 dimers change their sheen.
  
  From +8 to +7 oxidation state, it's a shift,
  Symmetry's restored when full lithiation's in the mix.
  Material turns into a semiconductor, back on track,
  Band gap measures 1 eV, that's a fact.
  
  Deintercalation potential, man, it's quite high,
  Reaches 1.29 V vs. Li/Li(+), reachin' for the sky.
  Activation energy for lithium ion migration, it's slick,
  0.79 eV, makin' moves, doin' the trick.
  
  Redox reaction, Nb2(8+) to Nb2(7+), it's the key,
  Niobium oxyfluoride in the anode application, you see.
  Li-ion batteries, they could benefit, no doubt,
  This research puts Nb2O2F3 on the map, no clout.