Abstract
The hollow microspherical structure cathode materials of bimetallic disulfide CoxNi1-xS2 (x varied from 0.1 to 0.5) for lithium thermal battery were synthesized by hydrothermal method. The structure, morphology, and composition of the hollow CoxNi1-xS2 were evaluated by field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). The thermal stability was assessed by differential thermal analyzer (DTA). The thermal battery fabricated with CoxNi1-xS2 as cathode active material and LiB as anode exhibits the good electrochemical performance at 450 °C. Especially when x = 0.1, the initial discharge voltage reached 2.037 V, and specific capacity was 297.4 mA h g−1 at cut-off voltage of 1.5 V during constant current discharge. The bimetal disulfide material also presented advantages of reducing the internal resistance of the single cell.
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This research is supported by the Natural Science Foundation of Shandong Province (ZR2018MEM017) and Shanghai Science and Technology Committee Rising-Star Program (19QB1403700).
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He, Y., Cao, L., Yuan, G. et al. Hydrothermally synthesized bimetallic disulfide CoxNi1-xS2 as high-performance cathode material for lithium thermal battery. Ionics 26, 4985–4991 (2020). https://doi.org/10.1007/s11581-020-03606-5
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DOI: https://doi.org/10.1007/s11581-020-03606-5