Instead of Ni-foam, as a current collector you can use Graphite foil and Carbon cloth but conductivity will be low as compared to Ni foam. Demerits of Graphite foil:
1.exfoliates in aqueous electrolyte;
2. provides additional capacitance which comes from Foil (which may interfere to get accurate capacitance of the active material).
Alternatives to Ni foam (or Graphite foil, Carbon cloth or Pt[1]) as current collector in supercapacitors, might be some Stainless Steel Foam[2] and some (pricey[3]) Ti foam[4].
1. High-priced Pt is only for small size (and number of current) collectors, as a specific example(s) and for comparison tests only, in the laboratory.
2. Stainless Steel Foam: SS316 1mm Thick x 250mm W x 250 mm L, SF-316-250-1 http://www.mtixtl.com/SF-316-100-1.6.aspx
3. Ti (Titanium) Foam (100mm length x 100mm width x 0.6mm thickness) - EQ-TiF-1106 http://www.mtixtl.com/search.aspx?find=Ti+foam%2c
4.
Article PPy modified titanium foam electrode with high performance f...
Dear Krish Na,
As an alternative, you can use a pasted electrode. In this case, add any binder and conductor additive (if it is needed) and spread it on a grid/a rod or a plate.
Regards
There is a substrate called nickel plaque which is discussed in the literature. It is made of porous nickel with very small pores (
Ni foam acts as a current collector in supercapacitor testing, specially in 3 electrode configuration . Several factors determine the selection of a current collector (CC). the main is inertness of the CC in the used electrolyte. Ni-foam is popular in alkaline or neutral electrolyte because of its high conductivity, high mass loading capability, good adhesion to the active material. However Ni foam can not be used in acidic electrolyte. Moreover Ni foam is not used in commercial supercapacitor. You can try making electrode without using any CC. For that you need to make a self standing electrode of active material+conducting carbon by using PTFE dispersion in ethanol/water as binder. This is more practical and reliable method. Detailed procedure can be found in many articles.
yes , in some cases Ni foam dont answer with your work as electrode
so you can flip to carbon fiber , graphite sheet , Ti sheet, cu sheet ......act
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