Our collaborative work with the Hu group @ Florida State University on functional defects in the Cl-doped Na3PS4 solid electrolyte has just been published in Advanced Functional Materials! Through tuning of Cl and Na vacancies in Cl-doped Na3PS4, we show that conductivities as high as 1.96 mS/cm can be achieved, with excellent full-cell performance in Na/Na3.0PS3.8Cl0.2/Na3V2(PO4)3 with a reversible capacity of 100 mAh/g at room temperature.