Nickel-zinc cells

P. Goldberg, "Nickel—Zinc Cells Part 1," Proceedings of the 21 st A.nnual Power Sources Conference 1967. 

A. Charkey, "Sealed Nickel—Zinc Cells," Proceedings of the 2Sth Annual Power Sources Conference Adantic City, N.J., 1972. 

A. Charkey, "Nickel—Zinc Cells for Sustained High-Rate Discharge," Proceedings of the 7th Intersociety Pnerg Confersion Engineering Conference, 1972. 

To address the zinc dendrite problem in nickel-zinc cells, eVionyx claims to have developed a proprietary membrane system that is nonporous, has very high ionic conductivity, is of low cost, and can block zinc dendrite penetration even in high concentrations of KOH. The polymeric membrane has an ionic species contained in a solution phase thereof. The ionic species behaves like a liquid electrolyte, while at the same time the polymer-based solid gel membrane provides a smooth impenetrable surface that allows the exchange of ions for both discharging and charging of the cell. 

Some efforts toward sealed battery development (76) were made. However, a third electrode, an oxygen recombination electrode was required to reduce the cost of the system. High rate applications such as torpedo propulsion were investigated (77) and moderate success achieved using experimental nickel—zinc cells yielding energy densities of 35 W-h/kg at discharge rates of 8 C. A commercial nickel—zinc battery is considered to be the most likely... 

The overall reactions in the nickel—zinc cell can be represented by... 

P. V. Popat, E. J. Rubin, and R. B. Flanders, "Nickel-Zinc Cells Part 3," Proceedings of the 21 st Annual Power Sources Conference, 1967. 

Mohamad AA, Mohamed NS, Yahya MZA, Othman R, Ramesh S, Alias Y, Arof AK (2003) Ionic conductivity studies of poly(vinyl alcohol) alkaline solid polymer electrolyte and its use in nickel-zinc cells. Solid State Ionics 156 171... 

Pocket Plate Electrode. This is the same type of electrode used in pocket plate nickel-cadmium and nickel-iron batteries. Electrodes are prepared by loading nickel hydroxide hydrate active material and a conductive additive (graphite and/or nickel flake) into tubular flat pockets which are then assembled into electrodes. Little interest currently exists in using this type of electrode in nickel-zinc cells since modern cells attempt to utilize lightweight electrode construction. 

Until recently one company (Yardney) offered a range of vented nickel-zinc cells in the capacity range 2 to 35 Ah at a working voltage of 1.6 V per cell. Typical characteristics of a 5 A h nickel zinc battery are shown... 

Fig ure4.15 (a) Eagle Richer NZS/5.0 (5Ah) nickel-zinc battery at 27°C (Courtesy of Eagle Richer) (b)Projected effect of discharge temperature on a Yardney nickel-zinc cell of 300A h capacity (Courtesy of Yatdney)... 

Figure 31.11 Typicaicharge/dischargecharacteristicsofanEagle Richer 5Ah nickel-zinc cell at 2A and 24 C (Courtesy of Eagle Picher)...

Nickel-zinc cells have a voltage of 1.85 V at 25°C and a high energy density (75Wh/kg", 150Wh/dm ). 

Figure 33.4 Typical discharge curve of a Yardney NZ EV3-XPI prototype bonded nickel-zinc cell, 75A h nominal capacity, 25°C at 15A discharge rate (Courtesy ef Yardney)...

Figure 33.5 Typical charge curve (voltage versus percentage capacity) of a Yardney NZ EV6 (FIAT) nickel-zinc cell at 25°C and 25A charge rate (Courtesy of Yardney)...

Separator systems for nickel-zinc cells have extensively employed cellulosie materials. New materials... 

Figure 61.40 Projected effect of discharge temperature on a Yardney nickel-zinc cell of 300 Ah oapacity(Courtesyof Yardney)...

The discharge charactelistics of a particular Eagle Richer nickel—zinc cell are shown in Figure 51.44. 

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