Controllable synthesis and electrical properties of single-phase sulfide cathode materials for thermal batteries
The single-phase sulfide cathode material was synthesized by high temperature solid-phase method.By controlling the thermodynamic advantage of single-phase sulfide in high sulfur and low oxygen,the intermediate transition state was transformed into the product equilibrium,which solved the technical problem of the coexistence of multiple sulfides,realized the artificial controllable synthe-sis,and effectively weakened the influence of voltage spikes.Single-phase iron/cobalt/nickel disulfide was synthesized at a sulfur/metal molar ratio of 2.5,a reaction temperature of 440 ℃,and a reaction time of more than 24 h.The corresponding thermal battery cell voltages were 2.05,1.98,and 2.01 V,and the output specific capacities were 883,875,and 958 As/g,respectively.Some research results have been transformed into engineering,and the performance of the synthesized NiS2 is slightly bet-ter than that of commercial materials.
thermal batterysingle sulfidecontrollable synthesiscathode material