In-situ thermal battery discharge using NiS2 as a cathode material
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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.
Payne , J L , Percival , J D , Giagloglou , K , Crouch , C J , Carins , G M , Smith , R I , Comrie , R , Gover , R K B & Irvine , J T S 2017 , ' In-situ thermal battery discharge using NiS 2 as a cathode material ' ChemElectroChem , vol 4 , no. 8 , pp. 1916-1923 . DOI: 10.1002/celc.201700095
© 2017 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
We thank AWE and the EPSRC (EP/K015540/1) for funding. JTSI acknowledges a Royal Society Wolfson Research Merit award. The research data supporting this publication can be accessed at https://doi.org/10.17630/92155136-9404-4844-a958-5de1e1af2c66
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