Synthesis and electrochemical study of CoNi2S4 as a novel cathode material in a primary Li thermal battery
Abstract
In this work CoNi2S4 was investigated as a candidate cathode material for Li thermal batteries. The CoNi2S4 was synthesized by a solid state reaction at 550◦C in a sealed quartz tube. Neutron powder diffraction was utilized to confirm normal spinel structure up to 200◦C, however, there was cation disorder above this temperature. The electrochemical properties of the batteries were investigated at 500◦C by galvanostatic discharge to elucidate the mechanism and the products NiS, Co3S4 and Co9S8 of the discharge mechanism were confirmed using powder X-ray diffraction. CoNi2S4 exhibits two voltage plateaus vs Li13Si4 at 500◦C, one at 1.75 V and the second at 1.50 V. CoNi2S4 has an overall capacity of 318 mA h g−1 from OCV 2.58 V to 1.25 V vs Li13Si4 which is comparable to that of the well-known metal disulfides
Citation
Giagloglou , K , Payne , J L , Crouch , C , Gover , R , Connor , P A & Irvine , J T S 2017 , ' Synthesis and electrochemical study of CoNi 2 S 4 as a novel cathode material in a primary Li thermal battery ' , Journal of The Electrochemical Society , vol. 164 , no. 9 , pp. A2159-A2163 . https://doi.org/10.1149/2.1171709jes
Publication
Journal of The Electrochemical Society
Status
Peer reviewed
ISSN
0013-4651Type
Journal article
Description
The authors acknowledge support and contribution from AWE Plc for this work, and thank the STFC for neutron diffraction beam-time.Collections
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