Table1 Specification of support collector

- Anode Cathode
Material titanium fiber
sintered plate		 stainless fiber
sintered plate
Virgin fiber size
[mm]		 width 0.05-0.1 0.012
length 80 4-10
Plate size
[mm]		 thickness
mean
maximum
minimum
1.093
1.149
0.965
1.046
1.154
0.995
width 270 270
length 1020 1020
Porosity % 60 70
Surface treatment
(thickness)		 platinum plating
(3mm)		 gold plating
(0.3mm)

Table2 Species of ionexchange membrane
1.material
perfluorocarbon sulfonic acid resin(made in Japan)
2.size
Type No. Equivalent
weight		 Thickness* [mm] (N=100) Width
[mm]		 Length
[mm]
mean maximum minimum
B2 1,000 38 45 31 300 1050
B4 1,000 99 111 88 300 1050
A12 920 115 121 109 300 1050
*measurement instrument Electromagnetic material thickness meter

Table3 Characteristics of membrane-electrode assemblies

No Membrane Anode
loading
(IrO2)
[mg/cm2]		 Cathode
loading
(Pt)
[mg/cm2]		 Thickness[mm] Electrolysis* voltage [V]
mean maximum minimum mean maximum minimum
1 B2 3.6 3.0 67 87 52 - - -
2 B4 3.6 3.0 126 140 114 1.541 1.563 1.528
3 A12 3.6 3.0 148 174 127 - - -
*Electrolysis voltage of 30 samples cut out from 2500cm2 membrane-electrode assembly was measured with 10cm2 cell at 80°C and 1A/cm2.

Table4 Electrolysis performance of test manufactured 2500cm2 cell

Cell
No		 Membrane Temperature

[°C]

 Current
density
[A/cm2]		 Cell
voltage
[V]		 Current
efficiency
[%]		 Energy
efficiency
[%]
1 B2 80 0.5
1
2
3
4		 1.491
1.540
1.613
1.680
1.738		 99.3
99.4
99.5
99.5
99.1		 98.6
95.5
91.3
87.7
84.4
2 B4 40 0.5
1
2
3		 1.623
1.710
1.851
1.942		 98.7
98.7
98.9
98.5		 90.0
85.4
79.1
75.1
60 0.5
1
2
3
4		 1.570
1.643
1.768
1.877
1.996		 98.6
98.6
98.8
98.4
97.5		 92.9
88.8
82.7
77.6
72.3
80 0.5
1
2
3
4		 1.514
1.583
1.702
1.805
1.898		 99.5
99.7
99.5
99.5
99.9		 97.2
93.2
86.6
81.4
77.9
3 A12 80 0.5
1
2
3
3.8		 1.513
1.586
1.702
1.806
1.879		 99.1
99.6
99.8
99.8
99.8		 97.0
92.9
86.8
81.8
78.6