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  • 1995-1999  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Optimized zinc electrode for the rechargeable zinc–air battery (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 895-898 
    Details
    ISSN: 1572-8838
    Keywords: zinc–air battery ; pasted zinc electrode ; cellulose ; cycle life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract For the development of a long-lived, electrically rechargeable zinc–air battery the structure and wettability of pasted zinc electrodes were optimized. Pasted zinc electrodes containing 1 to 10% cellulose but having almost the same nominal capacities were prepared and tested in zinc/oxygen cells. The effect of discharge rate on cell voltage and delivered capacity, as well as the maximum power, were measured. Furthermore, cell charge–discharge behaviour and cycle life were examined. After different times of operation, the porosity and the pore size distribution of the pasted zinc electrodes were measured by means of mercury porosimetry. The cycle life and peak power drain capability of the Zn/oxygen battery could be substantially improved by the addition of 10wt% cellulose to the pasted zinc electrode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003464011815
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Bipolar Al/02 battery with planar electrodes in alkaline and acidic electrolytes (1995)
    Springer
    Journal of applied electrochemistry 25 (1995), S. 114-121 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A filter-press-type Al/O2 battery with bipolar assembly of the electrodes was developed. The current-voltage curves and power output of monopolar and of bipolar batteries containing one to four cells were measured in alkaline (4 m NaOH and 7.5 M KOH) and acidic (3 m H2SO4 + 0.041 m HCl) electrolytes. The unit cell had an open circuit voltage of 1.85 V in alkaline media and 1.3 V in acidic media. The single bipolar unit delivered a maximum power of about 7.5 W (75 mW cm−2) at 0.7 V. The stack (four cells) had a maximum power of 30 W in 4 m NaOH and 35 W in 3 m H2S04 + 0.04 m HCl. The power output of the bipolar stack determined experimentally for different external loads could be described using the model of an electric equivalent circuit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248167
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Aluminium alloys in sulfuric acid Part II: Aluminium-oxygen cells (1996)
    Springer
    Journal of applied electrochemistry 26 (1996), S. 1217-1223 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Aluminium alloys were tested in Al/O2 cells with strongly acidic electrolytes containing minor amounts of chloride ions. The faradaic efficiency, the maximum discharge capacity and the peak power of various Al/O2 cells were evaluated. The temperature dependence of the faradaic efficiency was measured for an Al/O2 cell over the temperature range from 15 to 50°C. With a zinc-containing aluminium alloy, a faradaic efficiency of 84% and a cell voltage of 1.6 V at open circuit and 0.7 V at 100 mA cm−2 could be reached. The highest peak power 120 mW cm−2, was obtained with an Al-Zn/Sn alloy. On the basis of the solubility of the anode products in the electrolyte, a limiting specific energy of 70 Wh kg−1 was estimated. The cell voltage depends on the Al-alloys and on the catalyst used in the oxygen electrode. The cell voltage could be increased by about 200 mV when replacing the Pt-catalysed oxygen electrode with a noble-metal-free (CoCAA/DCD) electrode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249923
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    Paper (German National Licenses)
    Fulltext
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