Abstract
The PbSe@C nanoflowers were synthesized by solvothermal and high-temperature selenization method and applied to lithium-ion batteries. PbSe@C anode materials have remarkable cyclic performance (the reversible specific capacity reaches 495.4 mAh/g after 100 cycles at a current density of 100 mA g−1.) and satisfactory rate performance (The average specific discharge capacities of PbSe@C nanoflowers at the current densities of 100, 200, 500, 1000, and 2000 mA g−1 are 753.8, 587.5, 465.8, 398.3 and 340.9 mAh/g, respectively. When the current density is restored to 100 mA g−1, the specific discharge capacity of the PbSe@C nanoflowers is 600.1 mAh/g). Not only the carbon component in the nanocomposite can enhance the electrical conductivity of the material and prevent PbSe agglomeration, but also the pores in the nanocomposite provide room for volume expansion during charge and discharge. Therefore, the research of nanoflower structure provides a new direction for improving the performance of lead-based anode materials.
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