Bipolar electrochemical battery of stacked wafer cells
An electrochemical and sensitizer technology, applied in the field of bipolar laminated unit electrochemical cells, can solve problems such as expensive structures and processes
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example 1
[0100] A single-cell cell was fabricated consisting of a nickel positive electrode and a metal hydride negative electrode assembled in the device shown in Figure 1. The hydride electrode was prepared by mixing a mixture consisting of 45 g of misch metal hydride alloy, 0.5 g of Teflon powder and 4.5 g of CuO. The mixed rare earth metal hydride alloy used here is made of MnNi 3.5 CO 0.7 al 0.8 alloy composition. About 1 / 8-1 / 4 inch (inch is the imperial unit of length, 1 inch = 2.54 cm) granular hydride alloy was crushed five times between vacuum and 200 psi with dry press crushing hydration method to produce an average particle size of about 50 μm size. This mixture was blended twice for 30 seconds each on a high speed blender. The mixture was then rolled to a thickness of about 0.060 inches, folded and rolled at 90 degrees to a thickness of 0.060 inches. The above-mentioned folding and rolling along the direction of rotation were repeated seven times in succession until t...
example 2
[0103] Cells were fabricated as above except that the nickel electrodes were sintered and obtained from commercial sources. The 3×3 electrodes weigh 12g and are 0.028 inches thick. The battery cells were tested for life and showed that the cell voltage remained stable over 200 cycles, as shown in Figure 8 (cell No. 121).
example 3
[0105] The battery cells were assembled as described above except that the nickel electrodes were of the pasted foam type and the separators were of the plastic-encapsulated inorganic pigment. Commercially available electroformed nickel foam from Eltek was bonded with a mixture of 1% aqueous CMC added to a mixture of 10% cobalt monoxide and 90% nickel hydroxide. After drying, the 3 x 3 inch electrodes were compressed to a final thickness of 0.040 inches. The weight of the finished electrode was 14 g. As shown in Figure 9 (No. 144 battery), the battery still exhibits stable performance after more than 1500 cycles.
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