I would say that depends.

E.g. are the different axis of the disks specifically alligned with respect to the crystal lattice. Can you control that by the growth?

How anisotropic is the diffusion? E.g. LiCoO2 is layered and definitely shows only 2D ionic conductivity. Hence ich your disk would be flat perpendicular to the conventional c direction it should be very favorable for fast charge discharge kinetics as the diffusion paths are small in length.

However due to the anisotropy of LiCoO2 I guess it is exactly the opposite, that the diffusion pathways are perpendicular to flat axis. Perhaps you might do HRTEM for structure resolvement, if they are small enough.

BR

Nico

Thank you for your answer. I agree with the above.

I believe that syntheses of highly alligned nano materials will help the studies on the material performances, but I still unknow how to choose a better method for the control of material growth.

Could someone give some advices on the preparation of highly aligned micro or nano electrodes?

It is very interesting concept, and actually some of the approaches have been taken for cathode materials in Li-ion batteries. For example, Prof. Manthiram's group (U. Texas at Austin) controlled morphology of primary particles of LiNi0.5Mn1.5O4-based high voltage spinels. Similarly, many research group have tried to control the crystal morphology of olivine materials (e.g., LiMnPO4) to shorten the [010] diffusion length and thereby overcome the slow Li+ diffusion rate (due to its 1D characteristic). My general advice is that soft chemicals (i.e., polyanions) is much easier to control the morphology of primary particles compared with oxides; this is because oxides requires relatively high sintering temperature, where provided energy is high enough to rearrange the crystal morphology toward its own structural characteristic. In my best knowledge, wet chemistries (e.g., hydrothermal, sol-gel, polyol methods) have been useful to control the crystal morphology of nano materials.