Text: (WO2023280598)
Claims
1. A separator for alkaline electrolysis (1 ) comprising a porous support (100) and a porous layer (200) provided on the porous support, characterized in that at least 25 volume percent of the pores of the separator are filled with water.
2. The separator according to claim 1 wherein at least 40 volume percent of the pores of the separator are filled with water.
3. The separator according to claim 1 or 2 wherein the separator includes a first porous layer (250) provided on one side of the porous support and a second porous layer (250’) provided on the other side of the porous support.
4. The separator according to claim 3 wherein the first and the second porous layers are the same.
5. The separator according to any of the preceding claims wherein the porous layer(s) include a polymer resin and hydrophilic inorganic particles.
6. The separator according to claim 5 wherein the polymer resin is selected from the group consisting of polysulfone, polyethersulfone and polyphenylsulfide.
7. The separator according to claim 5 or 6 wherein the hydrophilic inorganic particles are selected from the group consisting of zirconium oxide, zirconium hydroxide, magnesium oxide, magnesium hydroxide, titanium oxide, titanium hydroxide and bariumsulfate.
8. The separator according to claim 7 wherein the hydrophilic inorganic particles have a particle size D50 of 0.7 pm or lower.
9. The separator according to any of the preceding claims wherein a thickness of the separator (t2) is from 75 to 500 pm.
10. The separator according to any of the preceding claims wherein a thickness of the separator (t2) is from 100 to 250 pm.
11. The separator according to any of the preceding claims wherein the porous support is a polymeric fabric selected from a polypropylene (PP), a polyphenylene sulphide (PPS) and a polyether ether ketone (PEEK) fabric.
12. The separator according to any of the preceding claims wherein the porous support has a thickness (t1 ) of 350 pm or less.
13. The separator according to any of the preceding claims wherein the porous support has a thickness (t1) of 100 pm or less.
14. A package including a separator as defined in any of the preceding claims and a packaging material, wherein the water vapour transmission rate (WVTR) of the packaging material is less than 1 g/m2/24 hours.
15. The package according to claim 14 also inluding an interleave between two separators. SUMMARIZE ABOVE TEXT