When you recycle a Hypercell Substation (ingredients: magnet, silicon, substation) it returns steel and supercapacitors instead of magnets and silicon.
Likewise, recycling a Hypercell Solar Panel does not return silicon cells, nor does a Hypercell Accumulator return magnets. I thought this might be deliberate but the oddness of the above has made me reconsider - if it is, though, just let me know! Presumably, this is because those are the recipes in the standalone non-moshine sub-mods of the items.