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  • 1
    Electronic Resource
    Electronic Resource
    Determination of oxygen in lithium by the vacuum distillation method (1969)
    s.l. : American Chemical Society
    Analytical chemistry 41 (1969), S. 1303-1306 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60279a049
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Vacuum distillation technique for recovery alkali-metal reaction products (1968)
    s.l. : American Chemical Society
    Analytical chemistry 40 (1968), S. 996-998 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60262a046
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Performance of a dual anode nickelhydrogen cell (1991)
    Elsevier
    Details
    Publication Date: 1991-12-01
    Print ISSN: 0378-7753
    Electronic ISSN: 1873-2755
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Elsevier
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    PAPER CURRENT
  • 4
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    Characterization testing of a 40 Ahr bipolar nickel hydrogen battery (1989)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: In a continuing effort to develop NiH2 bipolar technology to a point where it can be used efficiently in space flight, testing of a second 40 Ahr, 10-cell bipolar battery has begun. This battery has undergone extensive characterization testing to determine the effects of such operating parameters as charge and discharge rates, temperature, and pressure. The fundamental design of this actively cooled bipolar battery is the same as the first battery. Most of the individual components, however, are from different manufacturers. Different testing procedures as well as certain unique battery characteristics make it difficult to directly compare the two sets of results. In general, the performance of this battery throughout characterization produced expected results. The main differences seen between the first and second batteries occurred during the high-rate discharge portion of the test matrix. The first battery also had poor high-rate discharge results, although better than those of the second battery. Minor changes were made to the battery frame design used for the first battery in an attempt to allow better gas access to the reaction sites for the second build and hopefully improve performance. The changes, however, did not improve the performance of the second battery and could have possibly contributed to the poorer performance that was observed. There are other component differences that could have contributed to the poorer performance of the second battery. The H2 electrode in the second battery was constructed with a Goretex backing which could have limited the high-rate current flow. The gas screen in the second battery had a larger mesh which again could have limited the high-rate current flow. Small scale 2 x 2 batteries are being tested to evaluate the effects of the component variations.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Lewis Research Center, Space Electrochemical Research and Technology Conference: Abstracts; p 12-13
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The evaluation of layered separators for nickel-hydrogen cells (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: The concept of using layered separators to achieve the required electrolyte retention and bubble pressure fo nickel-hydrogen cells was evaluated in a boilerplate cell test. Zircar cloth, polyethylene paper and polypropylene felt were combined with a layer of radiation-grafted polyethylene film to achieve the required properties. Three cells of each layered separator were built and tested by characterization cycling and by low earth orbit cycling for 5000 cycles at 80 percent DOD. Three cells containing asbestos separators were used as the reference.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Marshall Space Flight Center, The 1990 NASA Aerospace Battery Workshop; p 653-676
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Performance of a dual anode nickel-hydrogen cell (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: An experimental study was conducted to characterize the voltage performance of a nickel hydrogen cell containing a hydrogen electrode on both sides of the nickel electrode. The dual anode cell was compared with a convenient single anode cell using the same nickel electrode. Higher discharge voltages and lower charge voltages were obtained with the dual anode cell during constant current discharges to 10C, pulse discharges to 8C, and polarization measurements at 50 percent of charge.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Space Electrochemical Research and Technology; p 195-207
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Effect of component compression on the initial performance of an IPV nickel-hydrogen cell (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An experimental method was developed for evaluating the effect of component compression on the charge and discharge voltage characteristics of a 3 1/2 in. diameter boiler plate cell. A standard boiler plate pressure vessel was modified by the addition of a mechanical feedthrough on the bottom of the vessel which permitted different compressions to be applied to the components without disturbing the integrity of the stack. Compression loadings from 0.94 to 27.4 psi were applied by suspending weights from the feedthrough rod. Cell voltages were measured for 0.96-C, 55-min charge and for 1.37-C, 35-min and 2-C, 24-min discharges. An initial change in voltage performance on both charge and discharge as the loading increased was attributed to seating of the components. Subsequent variation of the compression from 2.97 to 27.4 psi caused only minor changes in either the charge or the discharge voltages. Several one month open-circuit voltage stands and 1100 cycles under LEO conditions at the maximum loading have produced no change in performance.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-100102 , E-3590 , NAS 1.15:100102 , AIAA PAPER 87-9257
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Test results of a 60 volt bipolar nickel-hydrogen battery (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: In July, l986, a high-voltage nickel-hydrogen battery was assembled at the NASA Lewis Research Center. This battery incorporated bipolar construction techniques to build a 50-cell stack with approximately 1.0 A-hr capacity (C) and an open-circuit voltage of 65 V. The battery was characterized at both low and high current rates prior to pulsed and nonpulsed discharges. Pulse discharges at 5 and 10 C were performed before placing the battery on over 1400, 40% depth-of-discharge, low-earth-orbit cycles. The successful demonstration of a high-voltage bipolar battery in one containment vessel has advanced the technology to where nickel-hydrogen high-voltage systems can be constructed of several modules instead of hundreds of individual cells.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-89927 , E-3631 , NAS 1.15:89927 , AIAA PAPER 87-9262
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Component variations and their effects on bipolar nickel-hydrogen cell performance (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A 50 cell bipolar nickel-hydrogen battery was assembled to demonstrate the feasibility of constructing a high voltage stack of cells. Various component combinations were tested in this battery. The battery had approximately 1 ampere-hour of capacity and was constructed from components with an active area of 2" X 2". The components were parametrically varied to give a comparison of nickel electrodes, hydrogen electrodes, separators, fill procedures and electrolyte reservoir plate thicknesses. Groups of five cells were constructed using the same components; ten combinations were tested in all. The battery was thoroughly characterized at various change and discharge rates as well as with various pulse patterns and rates. Over a period of 1400 40% DOD LEO cycles some of the groups began to exhibit performance differences. In general, only separator variations had a significant effect on cell performance. It also appears that shunt currents may have been operating within the stack, resulting in electrolyte transfer from one cell to another, thus contributing to cell performance variations.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-89907 , E-3600 , NAS 1.15:89907 , AIAA PAPER 87-9260
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Performance of a Dual Anode Nickel-Hydrogen Cell (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: Nickel-hydrogen batteries are presently being used for energy storage on satellites in low Earth orbit and in geosynchronous orbit, and have also been selected for use on the proposed Space Station Freedom. Development continues on the cell technology in order to improve the specific energy and lengthen the cycle life. An experimental study was conducted to compare the voltage performance of a nickel-hydrogen cell containing a dual anode with the standard cell design which uses a single hydrogen electrode. Since the principle voltage loss in a nickel-hydrogen cell is attributed to the mass transport and resistive polarization parameters of the nickel electrode, addition of a hydrogen electrode on the other side of the nickel electrode should reduce the electrochemical polarizations by a factor of two. A 3.5 in. diameter boilerplate cell with a single 30 mils thick nickel electrode was cycled under various current conditions to evaluate its performance with a single anode and then with a double anode. A layered separator consisting of one Zircar cloth separator and one radiation-grafted polyethylene separator were used between the electrodes. The electrolyte was 26% KOH, and the tests were done at room temperature. The discharge voltage characteristics were determined as a function of current and depth-of-discharge. At the 4C discharge rate and 50% DOD, the voltage of the dual anode cell was 100 mV higher than the single anode cell. At 75% DOD the dual anode cell voltage was about 130 mV higher than the standard cell design. Resistances of the two c ell designs obtained from the slope of the mid-discharge voltages plotted against various currents indicated that the dual anode cell resistance was one-half of the state-of-the-art cell.
    Keywords: Energy Production and Conversion
    Type: Space Electrochemical Research and Technology: Abstracts; 37; NASA-CP-10067
    Format: text
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    NASA TECHNICAL REPORTS
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