From I think this may be the revolutionary battery technology we have been waiting for - Page 2 - JREF Forum
It does look very promissing. Well understood chemistry, cheap and easy to make (for Chinese companies) - It won't be long before your average battery (36V 15AH) weighs less than 1kg and costs under £100.
The amazing ionic conductivity of PSP makes possible elimination of liquid electrolyte, resulting in thinner, lighter cells and better gravimetric energy density. The researchers reckon they can get 4 to 8 times the power storage density of current Lithium iron phosphate batteries.Li3PS4 was prepared by a procedure described previously.[14] The sulfur compounds Li3PS4+n (n=2,3,5,6, and 8) were synthesized through solution reactions of Li3PS4 and elemental sulfur in tetrahydrofuran (THF) under magnetic stirring without exposure to air or moisture. After the solids were fully dissolved, the solution was dried under vacuum for 2 h at 80C. The recovered solids were lithium polysulfidophosphates. The cathode slurry was prepared by dispersing Li3PS4+5 (60 wt%), WVA-1500 carbon (MeadWestvaco Corporation, 30 wt%), and PVC binder (10 wt%) in THF. No side reaction occurred to the binder during the preparation of electrode because of the rapid evaporation of solvent.[15] A solid electrolyte pellet of Li3PS4 with a lithium metal anode was prepared by coldpressing nanoporous b-Li3PS4 (120 mg) on top of a thin lithium foil (50 micron thick) under 240 MPa pressure in a 13 mm die. The slurry was then coated on the other side of the pellet and dried under vacuum at 80C. The loading of the cathode materials is 0.25–0.60 mgcm2, which is equivalent to 0.15–0.36 mAhcm2. The final thickness of the pellets was 0.5 mm.
It does look very promissing. Well understood chemistry, cheap and easy to make (for Chinese companies) - It won't be long before your average battery (36V 15AH) weighs less than 1kg and costs under £100.
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