Electrochemical properties of nickel-precipitated pyrite as cathode active material for lithium/pyrite cell

FeS2/C composite as an anode for lithium ion batteries with enhanced reversible capacity

“…For example, Montoro et al found that the gelatin-pyrite composite electrode could sustain 279 mAh g À1 after 15 cycles in the voltage range of 1.1e3.2 V (vs. Li/Li þ ) at 0.4 mA cm À2 [4]. Choi et al reported a nickel-precipitated pyrite which could exhibit an initial discharge capacity of 600 mAh g À1 at 89 mA g À1 between 0.8 and 2.4 V (vs. Li/Li þ ) [5]. However, it is still a great challenge to obtain high-performance FeS 2 electrode material with both large reversible capacity and long cycling life.…”

Enhanced electrochemical performance of FeS2 synthesized by hydrothermal method for lithium ion batteries

“…Huang et al [3] prepared FeS 2 film which delivered discharge specific capacity of 442 mAh g -1 for the second cycle at 50 lA cm -2 . Choi et al [18] reported that nickel-precipitated pyrite exhibited initial discharge capacity of 600 mAh g -1 at 89 mA g -1 between 0.8 and 2.4 V (vs. Li/Li ? ).…”

High-purity iron pyrite (FeS2) nanowires as high-capacity nanostructured cathodes for lithium-ion batteries

“…5 Such limited reversibility is due in large part to the conversion mechanism involved in the lithiation/delithiation of pyrite cathodes, which operates very differently from the commonly used intercalation cathode materials. 9 To date, most of the previous pyrite cathodes were prepared from micrometersized natural 5,6,[13][14][15][16][17] or synthetic 6,13,18 pyrite particles but the lithium-storage behavior of nanostructured phase-pure pyrite remains inadequately explored.…”

“…Furthermore, we prepared composite electrodes comprised of pyrite NWs, carbon black, and polyvinylidene diuoride (PVDF) binder and performed galvanostatic cycling tests to show that the nano-pyrite cathodes exhibit high capacity and excellent capacity retention at room temperature. Note that in this work, we followed many previous literatures [5][6][7][13][14][15][16][17] to describe and investigate our nano-pyrite as a cathode material, though pyrite has also been studied as an anode material in recent years. [37][38][39] Despite its lower potential ($1.5 V) compared with other conventional intercalation cathodes, pyrite can provide a much higher Li-storage capacity of 894 mAh g À1 , assuming complete reaction to Li 2 S and Fe.…”