کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
187469 459643 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fe3O4–pyrolytic graphite oxide composite as an anode material for lithium secondary batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Fe3O4–pyrolytic graphite oxide composite as an anode material for lithium secondary batteries
چکیده انگلیسی

Fe3O4–pyrolytic graphite oxide (Fe3O4–PGO) composite has been prepared by solvothermal reaction at 200 °C. The as-prepared Fe3O4–PGO composite displays excellent cycle stability and rate capability with the initial discharge capacity of 1275 mAh g−1 and capacity retention of 81% after 50 cycles compared with pure Fe3O4. The reasons are as follows: (i) in situ synthesized Fe3O4 firmly anchors onto the exfoliated PGO sheets, and the PGO acts as a conductive agent to provide a fast path for electron transportation; and (ii) the interstitial cluster structure of microsphere-type Fe3O4 in Fe3O4–PGO composite facilitates more better percolation of the electrolyte, more efficient accommodation with the strain and stress of volume change upon cycling and faster Li-ion transfer.


► Fe3O4–pyrolytic graphite oxide (Fe3O4–PGO) composite was prepared by solvothermal reaction at 200 °C.
► PGO is a conductor with electronic conductivity higher than 1 S cm−1 when thermal treating at more than 180 °C.
► PGO is directly used as a conductive agent.
► The results demonstrate that PGO obviously improves electrochemical performance of Fe3O4–PGO composite.
► The discharge capacities of Fe3O4–PGO on the initial cycle are 1275 mAh g−1 and 1035 mAh g−1 after 50 cycles at 0.2 C, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 90, 15 February 2013, Pages 426–432
نویسندگان
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