This is a possibility: "BAVARIA – German filament yarn business, TWD Fibres, has launched a range of antimony-free polyester yarns. Antimony oxide is used globally as catalyst in polyester fibre and filament yarn production processes. ... The Diolen Hypoallergenic yarns made by TWD see the use of antimony oxide replaced by non-toxic substitutes."
This may simply be fabrics but if it can be used in fabrics, that's something else, but the latest EV batteries may still need it...I don't know. Also, Puter has an amount of Antimony and Silver within it's mix, otherwise, you'd have to do a Web Search. China is the biggest industry supplier of Antimony...88% or so. It's a toxic and carcinogenic mineral but I cannot see a decline all the while EV's are on the up and the need for batteries is ever increasing. I doubt there's anything to be worried about if you in vest in a reliable BIG and proper Antimony Miner. Just DYOR.