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In‐Situ Thermal Battery Discharge using NiS 2 as a Cathode Material
Author(s) -
Payne Julia L.,
Percival Julia D.,
Giagloglou Kyriakos,
Crouch Christina J.,
Carins George M.,
Smith Ronald I.,
Comrie Robert,
Gover Richard K. B.,
Irvine John T. S.
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700095
Subject(s) - cathode , rietveld refinement , battery (electricity) , materials science , electrochemistry , nickel , powder diffraction , nickel sulfide , analytical chemistry (journal) , diffraction , electrode , metallurgy , chemistry , crystallography , thermodynamics , optics , physics , power (physics) , chromatography
NiS 2 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 NiS 2 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 (NiS 2 , NiS, Ni 3 S 2 and Ni). A new discharge mechanism has been proposed which does not include Ni 7 S 6 . 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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