Journal
POWDER TECHNOLOGY
Volume 229, Issue -, Pages 24-29Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.powtec.2012.05.035
Keywords
Mechanical alloying; Lithium-ion batteries; Wet milling; Nickel disulfide and Fe-doped nickel disulfide cathodes
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Funding
- National Research Foundation of Korea (NRF) [2009-0071729, R32-20093]
- Ministry of Education, Science and Technology
- National Research Foundation of Korea [2009-0071729] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, fine cathode materials NiS2 and Fe-doped NiS2 are prepared by mechanical alloying (MA), small mean particle sizes of each other are obtained through wet ball-milling. To compare the performance of Li/NiS2 and Li/Fe-doped NiS2 cells prepared by both Planetary Ball Mill (PBM) and SPEX Mill (SM) respectively, the following results have been revealed: SM can do a great deal towards improving the initial discharge capacity of both cells; the cycle life of all cells prepared by PBM was better than SM which is may be due to the small number of lattice defects and low internal stress for different milling conditions used; wet milling process can help to improve the whole characteristic of Li/Fe-doped NiS2 cells, but not seem to apply to Li/NiS2 one; the main factor influencing the performance of Li-ion cells is the doping of iron elements, which may stable the crystal structure in the process of intercalation and deintercalation of lithium ions between the active materials. (C) 2012 Elsevier B.V. All rights reserved.
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