Investigation of Primary Li-Si/FeS2 Cells

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The factors that limit the performance of thermally activated Li-Si/FeS2 batteries were defined through the use of electrochemical characterization tests and post-test examinations. For the characterization tests, 82 individual cells were instrumented with multiple voltage sensors and discharged under isothermal and isobaric conditions. The voltage data for the sensors were recorded to determine the ohmic and electrochemical impedances of each cell component at different levels of discharge. The data analysis completed to date has demonstrated that this approach can successfully differentiate the influence of various operating parameters (e.g., temperature, current density), electrode structures (e.g., FeS2 particle size), and additives on … continued below

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vi, 49 p. : charts, photographs, tables

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Redey, L.; Smaga, J. A.; Battles, J. E. & Guidotti, Ronald April 1987.

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  • Main Title: Investigation of Primary Li-Si/FeS2 Cells
  • Added Title: ANL (Series)
  • Added Title: Argonne National Laboratory Report ANL-87-6
  • Series Title: Argonne National Laboratory Reports

Description

The factors that limit the performance of thermally activated Li-Si/FeS2 batteries were defined through the use of electrochemical characterization tests and post-test examinations. For the characterization tests, 82 individual cells were instrumented with multiple voltage sensors and discharged under isothermal and isobaric conditions. The voltage data for the sensors were recorded to determine the ohmic and electrochemical impedances of each cell component at different levels of discharge. The data analysis completed to date has demonstrated that this approach can successfully differentiate the influence of various operating parameters (e.g., temperature, current density), electrode structures (e.g., FeS2 particle size), and additives on cell capacity, specific energy, and power capability. Thirty cells selected from these tests and additional tests at SNL were examined using optical and scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. These analyses documented microstructural and compositional changes in the active materials and electrolyte. In general, the electrochemical impedance of the FeS2 electrode limited cell performance. Several methods (including use of fine FeS2 particle size, graphite additions, and higher operating temperatures) produced measurable reductions in this impedance and yielded significant improvements in specific energy and power. Additions of KCl to the negative electrode extended the low-temperature capacity of this electrode by counterbalancing gradients in electrolyte composition that develop during discharge.

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vi, 49 p. : charts, photographs, tables

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  • OCLC: 879282892
  • SuDoc Number: Y 3.AT 7:22/ANL-87-6
  • Report No.: ANL-87-6
  • Grant Number: W-31-109-Eng-38
  • Archival Resource Key: ark:/67531/metadc282814

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Technical Report Archive and Image Library

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  • April 1987

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  • Aug. 4, 2015, 8:33 a.m.

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Redey, L.; Smaga, J. A.; Battles, J. E. & Guidotti, Ronald. Investigation of Primary Li-Si/FeS2 Cells, report, April 1987; Argonne, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc282814/: accessed May 5, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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