Get the materials

You will need these materials to make a successful FIPT measurement:

  • Your electrode (2 × 20mm × 50mm per measurement)
  • Separator material
  • Non-intercalating electrolyte

Separator material

While many different separators can be used, this one works well:

GE Healthcare Whatman ™, 1820-240, 250um glass fiber

_images/material_seperator_small.jpg

Electrolyte

For the FIPT measurement a weakly conducting, non-intercalating electrolyte is used. We typically use the following electrolyte (ID: RM296):

Description:0.020 mol/kg NaClO4 in EC:DMC 3:7 (w/w)
Condictivity at 25degC:
 0.658 mS / cm (temperature coefficient: 1.31% / ΔdegC)

If you want to make it yourself, you need two materials:

Salt:Sodium perchlorate monohydrate (SigmaAldrich 310514-100G, CAS Number 7791-07-3)
Solvent:EC:DMC 3:7 (w/w)

Then you mix them:

  • use 100ml vial
  • add 60g of EC:DMC 3:7 (w/w)
  • add 168.5mg Salt (RM0292, CAS Number 7791-07-3)
  • mix well

If the electrolyte is well closed (parafilm), it can used in ambient conditions for up to 4 weeks. Note that a shift in conductivity can happen (+10%) over time, which should be accounted for by regular measurement of the conductivity.