Page 366 - Handbook of Battery Materials

336 11 Separators

Table 11.16 Microporous separators for alkaline batteries.

Microporous polypropylene film Microporous Sintered PVC
filled UHMW separator
polyethylene separator
separator

Supplier Hoechst Hoechst Daramic, Inc Jungfer GmbH
Celanese Corp. Celanese Corp. [60, 61] [64] Sintered
[132] Celgard [132] Celgard PowerSep PVC
3401 3501
Thickness (mm) 0.025 0.025 1.3 1.3
Backweb 0.025 0.025 0.2 0.3
thickness (mm)
Porosity (%) 38 45 40 33
Pore size <1 <1 0.2 15
(average) (µm)
Electrical 80 4 200 300
resistance (KOH)
2
(m cm )

Table 11.17 Semipermeable membranes for alkaline batteries.

Regenerated cellulose membrane Regenerated Polyamide
cellulose nonwoven
membrane impregnated with
(silver-treated) regenerated
cellulose

Supplier UCB Viskase Corp. Yardney Techn. Viskase Corp.
Cellophane Ltd. [135] Prod., Inc. [136] [135]
[134]
Brand name 350 POO SEPRA-CEL C 19 SEPRA-CEL
Thickness 0.025 0.025 0.025 0.175
(mm)
Pore size (nm) 2.5 2.5–5 2.5 n.a.
KOH n.a. a 60 55 275
absorption
–2
(g m )
Electrical 40 n.a. <120 90
resistance
(KOH)
2
(m cm )
a
n.a.: not available.