期刊
JOURNAL OF POWER SOURCES
卷 466, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228286
关键词
1D polyphosphate; 2D NiMn-Layered double hydroxide; Hexagonal microrods; Nanoflakes
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2017R1E1A1A01074550]
- Chonnam National University [2017-2837]
In this work, a hierarchical 2D NiMn-layered double hydroxide (LDH) @1D transition metal polyphosphates (1D NiCoP2O7) nanostructure is rationally prepared for hybrid sustainable supercapacitor to overcome the limitation of the traditional carbon-based supercapacitor. Initially, the vertically aligned 1D NiCoP2O7 hexagonal microrods are prepared over 3D nickel foam and then it is decorated with 2D NiMn-LDH nanoflakes to form core-shell nanostructure. Benefiting from the micro-nano structure, 2D NiMn-LDH@NiCoP2O7- core-shell electrode exhibits excellent electrochemical features with reversible charge storage specific capacity of 662.95 mAh g(-1) and excellent rate capability, which is quite suitable for the high-energy hybrid supercapacitor fabrication. The accumulated hybrid supercapacitor consisting of 2D NiMn-LDH@NiCoP2O7 and activated carbon achieves a high specific capacitance of 142.1 F g(-1), delivers remarkable specific energy (56.15 Wh kg(-1) at a specific power of 4210 W kg(-1)) and endured superior cyclic stability over 10000 cycles. Such remarkable results may provide a new perspective for the development of supercapacitive electrode from metal oxide materials.
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