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In-situ thermal battery discharge using NiS2 as a cathode material

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Author(s)

Julia L. Payne, Julia D. Percival, Kyriakos Giagloglou, Christina J. Crouch, George M. Carins, Ronald I. Smith, Robert Comrie, Robert K. B. Gover, John T. S. Irvine

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Abstract

NiS2 is a cathode material found in primary batteries which operate at high temperature. Herein we report the in situ battery discharge study of a thermal battery cell which uses NiS2 as a cathode, using simultaneous collection of powder neutron diffraction data and electrochemical data. Five different regions were observed upon battery discharge and the evolution of nickel sulfide phases has been studied. Four different nickel-containing phases are observed during discharge (NiS2, NiS, Ni3S2 and Ni). A new discharge mechanism has been proposed which does not include Ni7S6. Multiphase quantitative Rietveld refinement has allowed the percentages of the phases to be monitored during discharge. High intensity synchrotron powder X-ray diffraction has been used to study the resulting phases present in the cathode after battery discharge.
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Original languageEnglish
Pages (from-to)1916-1923
Number of pages8
JournalChemElectroChem
Volume4
Issue number8
Early online date27 Apr 2017
DOIs
StatePublished - Aug 2017

    Research areas

  • Cathodes, Electrochemistry, Nickel disulfide, Neutron diffraction, Thermal batteries

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