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Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors
นักวิจัย : Wang, Hsin-Yi , Xiao, Fang-Xing , Yu, Le , Liu, Bin , Lou, David Xiong Wen
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Wang, H.-Y., Xiao, F.-X., Yu, L., Liu, B., & Lou, D. X. W. (2014). Hierarchical α-MnO 2 Nanowires@Ni1-xMnxOy Nanoflakes Core-Shell Nanostructures for Supercapacitors. Small, 10(15), 3181-3186. , 1613-6810 , http://hdl.handle.net/10220/20514 , http://dx.doi.org/10.1002/smll.201303836
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Small
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A facile two-step solution-phase method has been developed for the preparation of hierarchical α-MnO2 nanowires@Ni1-xMnxOy nanoflakes core–shell nanostructures. Ultralong α-MnO2 nanowires were synthesized by a hydrothermal method in the first step. Subsequently, Ni1-xMnxOy nanoflakes were grown on α-MnO2 nanowires to form core–shell nanostructures using chemical bath deposition followed by thermal annealing. Both solution-phase methods can be easily scaled up for mass production. We have evaluated their application in supercapacitors. The ultralong one-dimensional (1D) α-MnO2 nanowires in hierarchical core–shell nanostructures offer a stable and efficient backbone for charge transport; while the two-dimensional (2D) Ni1-xMnxOy nanoflakes on α-MnO2 nanowires provide high accessible surface to ions in the electrolyte. These beneficial features enable the electrode with high capacitance and reliable stability. The capacitance of the core–shell α-MnO2@Ni1-xMnxOy nanostructures (x = 0.75) is as high as 657 F g−1 at a current density of 250 mA g−1, and stable charging-discharging cycling over 1000 times at a current density of 2000 mA g−1 has been realized.

บรรณานุกรม :
Wang, Hsin-Yi , Xiao, Fang-Xing , Yu, Le , Liu, Bin , Lou, David Xiong Wen . (2557). Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wang, Hsin-Yi , Xiao, Fang-Xing , Yu, Le , Liu, Bin , Lou, David Xiong Wen . 2557. "Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wang, Hsin-Yi , Xiao, Fang-Xing , Yu, Le , Liu, Bin , Lou, David Xiong Wen . "Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Wang, Hsin-Yi , Xiao, Fang-Xing , Yu, Le , Liu, Bin , Lou, David Xiong Wen . Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.