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Electrochemical properties of nickel-precipitated pyrite as cathode active material for lithium/pyrite cell
- Authors
- Choi, Y. J.; Kim, N. W.; Kim, K. W.; Cho, K. K.; Cho, G. B.; Ahn, H. J.; Ahn, J. H.; Ryu, K. S.; Gu, H. B.
- Issue Date
- 19-Oct-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Lithium/pyrite cell; Pyrite cathode; Electroless nickel plating; Precipitation
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.485, no.1-2, pp 462 - 466
- Pages
- 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 485
- Number
- 1-2
- Start Page
- 462
- End Page
- 466
- ISSN
- 0925-8388
1873-4669
- Abstract
- The effects of nickel precipitation and the cut-off voltage on the electrochemical properties of a pyrite cathode were investigated by using an electroless nickel-plating method. After nickel precipitation, some nickel particles that were precipitated on the surface of pyrite accumulated between the pyrite powder particles. In the voltage range of 0.4-3.2 V, a cell with nickel-precipitated pyrite exhibited a rapid decrease in discharge capacity and poor columbic efficiency. On the other hand, in the voltage range of 0.8-2 4 V. the cell showed an improved cycle life property and good coulombic efficiency because irreversible reactions below 0.8 V and sulfur oxidation above 2.4 V were suppressed by controlling the cut-off potential and the internal resistance was decreased by nickel precipitation. (C) 2009 Elsevier B.V. All rights reserved.
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