کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7887552 1509791 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vertically aligned, polypyrrole encapsulated MoS2/graphene composites for high-rate LIBs anode
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Vertically aligned, polypyrrole encapsulated MoS2/graphene composites for high-rate LIBs anode
چکیده انگلیسی
Ultrathin MoS2 nanosheets were vertically anchored on the reduced graphene oxide (MoS2/rGO) via hydrothermal method. To further engineering the surface conductivity, ultrathin polypyrrol (PPy) layer was coated on the MoS2/rGO composite via in situ polymerization to form a bi-continuous conductive network with a sandwich-like structure. The graphene nanosheets and the PPy coating can facilitate the electrons transfer rate, while the ultrathin MoS2 nanosheets can enhance the utilization efficiency of the active materials. The obtained MoS2/rGO-10 composite exhibits high reversible specific capacity (970 mAh g−1 at 0.1 A g−1) and rate capability (capacity retention of 64% at 3.2 A g−1). Moreover, the PPy@MoS2/rGO hybrids reveal lower specific capacity but better rate capability, and a “trade-off” effect between electrons and ions transfer resistance was observed. This easy-scalable PPy surface conductivity engineering strategy may be applied in the preparation of high-performance LIBs active materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 7, May 2018, Pages 7611-7617
نویسندگان
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