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Jiang J.,Anhui University of Science and Technology | Jiang J.,Laboratory of Nanomaterials for Energy Conversion LNEC | Wang C.,Anhui University of Science and Technology | Wang C.,Laboratory of Nanomaterials for Energy Conversion LNEC | And 4 more authors.
Dalton Transactions | Year: 2015

Nanorod-FeP@C composites are synthesized via a one-pot solution reaction of ferrocene (Fe(C5H5)2) with excess triphenylphosphine (PPh3) in sealed vacuum tubes at 390 °C, in which PPh3 is used as both the phosphorus source and solvent in the reaction. The structure and lithium storage performance of the as-prepared nanorod-FeP@C composites are intensively characterized, and it is interesting that the composites exhibit an increased capacity during cycling serving as anode materials for lithium-ion batteries (LIBs). Meanwhile, mechanism investigations reveal that the capacity increase of the composites results from a hysteretic lithiation of the nanostructured FeP phase due to the coating of the carbon shell in the composites. Meanwhile, cyclic stability investigation shows that the composites have a very good cyclic stability that shows potential for the composites with a long lifespan as a promising kind of anode material. © The Royal Society of Chemistry 2015.

Jiang J.,Hefei University of Technology | Jiang J.,Laboratory of Nanomaterials for Energy Conversion LNEC | Wang W.,Hefei University of Technology | Wang W.,Laboratory of Nanomaterials for Energy Conversion LNEC | And 8 more authors.
Electrochimica Acta | Year: 2015

Abstract Phosphorous-rich phase iron diphosphide/carbon tube (FeP2/C) nanohybrids, which are synthesized via a pyrolysis process and composed of heterostructures of orthorhombic FeP2 with conical carbon tubes, have been identified as a new anode in lithium-ion batteries. After an annealing treatment to eliminate the excessive hydrogen elements in the carbon tubes, the FeP2/C nanohybrids display good reversible capacity, long cycle life, and excellent rate capability. Specifically, the annealed hybrids exhibit a discharge capacity of 602 mA h g-1 on the second cycle and a discharge capacity of 435 mA h g-1 after 100 cycles at 0.1C (0.137 A g-1). Meanwhile, these annealed hybrids exhibit excellent rate capability, such as a reversible capability of 510 mA h g-1, 440 mA h g-1, 380 mA h g-1, 330 mA h g-1 and 240 mA h g-1 at 0.25C, 0.5C, 1C, 2.5C and 5C, respectively. © 2015 Elsevier Ltd. All rights reserved.

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