Using nonstandard gender-neutral pronouns to refer to myself in academic writing
It's your decision what to write, but to my mind, adding a note trying to explain your preferred pronouns seems like it puts the emphasis on something which you probably don't want to make the focus.  

I'm young enough to be fairly familiar with this stuff, but I have to be honest, the thing I'd remember after read your paper would be "Huh, I've never seen anyone write a note like that before."  I don't want to suggest the way you identify is something you want to hide, but remember that your article is going to be read (hopefully) by a lot of older people or people from other cultures who have no idea what "ze" is supposed to mean, and I assume your main goal is not to educate them about that stuff.  

I would encourage you to instead use "they" or "we" when referring you yourself ("the PI presented on their research" or "we presented on our research"); these might be a little awkward, but they have an established pedigree in writing, and shouldn't strike people as too out of place.