MoS2/纳米炭纤维的合成及其用作锂离子电池负极材料的储锂性能

Nanofibers with MoS2 nanosheets encapsulated in carbon as a binder-free anode for superior lithium storage

  • 摘要: 以聚丙烯腈和剥离的MoS2为原料,采用电化学静电纺丝法合成了一维(1D)结构的MoS2/CNFs。剥离的MoS2尺寸约为150 nm,并能镶嵌在纳米炭纤维基体内。所制1D MoS2/CNFs可以切成柔性圆片,在无需添加粘结剂的情况下直接用作电极片。该1D MoS2/CNFs负极材料展现出较好的电化学性能,在100 mA g-1的电流密度下,反复充放电50次,可逆容量高达700 mAh g-1;在1 000 mA g-1的大电流密度下,反复充放电200次,可逆容量仍保持450 mAh g-1

     

    Abstract: One-dimensional MoS2/carbon nanofibers (MoS2/CNFs) were synthesized by electrospinning using exfoliated MoS2 nanosheets and polyacrylonitrile as the precursors. The exfoliated MoS2 nanosheets about 150 nm across were encapsulated in carbon, and the free-standing MoS2/CNF film was easily cut into a flexible tablet that could be directly used as a binder-free anode for lithium storage. The MoS2/CNFs showed a high reversible capacity of 700 mAh g-1 at 100 mA g-1 after 50 cycles, a high rate capacity of 450 mAh g-1 at 1000 mA g-1 after 200 cycles and good cycling stability.

     

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