Because  electrode  structure  is  a  crucial  determinant  of  supercapacitor performance, there are multiple studies of supercapacitor electrodes with various structures.  Here,  experimental  observations  of  the  diameter-dependent  super-capacitor  performance  of  a  liquid  crystalline  (LC)-assisted  MXene  fiber-based electrode  produced  through  a  wet-spinning  process  is  reported.  It  is  shown  that Ti3C2Tx  nanosheets  are  highly  dispersed  in  water  and  do  not  form  aggregates  or undergo  phase  separation.  MXene  dispersion  exhibits  the  typical  shear  thinning behavior  of  liquid  crystals  above  the  critical  mass  fraction.  Various  MXene  fibers derived  from  needles  of  different  diameters can  be  produced  using  one  method. LC-assisted  MXene fibers are characterized  by a high electrical conductivity of up to 2012.27 S cm1. Furthermore, the optimized MXene fiber-based device has an areal  capacitance  of  up  to  6.82 F cm2,  indicating  the  utility  of  LC-assisted MXene  fibers  in  fiber-shaped  supercapacitor  devices.  The  synthetic  method  has considerable  advantages  for  applications  in  high-performance  supercapacitors with  both  stable  device  operation  and  high  areal  capacitance.