Synthesis of Cathode Materials Fe-Doped NiS2 by Mechanical Alloying for Li/NiS2 Cells

Xiao Jing Liu; Dong Wook Park; Zhe Zhu Xu; Sang Dae Kang; In Shup Ahn; Hyo Jun Ahn

doi:10.4028/www.scientific.net/AMR.287-290.1428

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Synthesis of Cathode Materials Fe-Doped NiS2 by...

Synthesis of Cathode Materials Fe-Doped NiS₂ by Mechanical Alloying for Li/NiS₂ Cells

Abstract:

In order to synthesize the fine compound iron-doped nickel disulfide (NiS₂) with environmentally friendly nickel, sulfur and iron powders, mechanical alloying (MA) was conducted for 8 hrs with SPEX Mill at a speed of 1000 rpm. In this process, stearic acid was added as a kind of process control agents (PCAs) to prevent the excessive cold welding. Meanwhile, for the purpose of getting nanocrystalline of Fe-doped NiS₂ powder particles to improve the contact areas between the active materials, the wet milling process was also done for 30 hrs with normal hexane (C₆H₁₄) as a solvent PCA. The prepared powders were characterized by FE-SEM, XRD, EPMA, EDS and TEM. Finally, the charge/discharge properties of Li/Fe-doped NiS₂ cells were investigated at room temperature by employing 1 M LiCF₃SO₃ (lithium trifluoromethanesulfonate) dissolved in TEGDME (tetraethylene glycol dimethylether) as the electrolyte. The initial discharge capacity of Li/Fe-doped NiS₂ cell using wet milled powders as the cathode material is 792 mAh/g, which may indicate its high energy density and good future as cathode materials for lithium-ion batteries.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

1428-1432

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.1428

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Online since:

July 2011

Authors:

Xiao Jing Liu, Dong Wook Park, Zhe Zhu Xu, Sang Dae Kang, In Shup Ahn, Hyo Jun Ahn

Keywords:

Cathode Material, Fe-Doped NiS₂, Mechanical Alloying (MA)

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