Citation: Song Ge, Yi Zonglin, Xie Lijing, Bi Zhihong, Li Qian, Chen Jingpeng, Kong Qingqiang, Chen Chengmeng. In-situ conversion of Ni₂P/rGO from heterogeneous self-assembled NiO/rGO precursor with boosted pseudocapacitive performance[J]. Chinese Chemical Letters, ;2020, 31(6): 1392-1397. doi: 10.1016/j.cclet.2020.03.046 shu

In-situ conversion of Ni₂P/rGO from heterogeneous self-assembled NiO/rGO precursor with boosted pseudocapacitive performance

Song Ge ^a,b ,
Yi Zonglin ^c ,
Xie Lijing ^a ,
Bi Zhihong ^a,b ,
Li Qian ^d ,
Chen Jingpeng ^a,b ,
Kong Qingqiang ^a ,
Chen Chengmeng ^a,e,*,

a.
CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
d.
Department of Chemical Engineering, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
e.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

ccm@sxicc.ac.cn

Received Date: 4 February 2020
Revised Date: 1 March 2020
Accepted Date: 17 March 2020
Available Online: 18 March 2020

Figures(6)

Two-dimensional (2D) heterostructural Ni₂P/rGO is successfully fabricated by in-situ phosphating selfassembled NiO/rGO composites and shows the enhanced electrochemical performances. In this design, the rGO sheets effectively reduce the lattice strain created during the phase transformation from NiO to Ni₂P, thereby maintaining ultrathin nanostructures of Ni₂P. The resulting Ni₂P/rGO layered heterostructure gives the composite plenty of pores or channels, good electrical conductivity and well-exposed active sites. Density functional theory (DFT) calculation further demonstrates that the Fermi energy level and electron localize of near Ni atoms in Ni₂P is higher than that of NiO, which endow Ni₂P with faster and more reversible redox reactivity in dynamic. Benefiting from their structural and compositional merits, the as-synthesized Ni₂P/rGO exhibits high specific discharge capacity and excellent rate performance. Furthermore, a hybrid supercapacitor built with Ni₂P/rGO and activated carbon shows a high specific energy of 38. 6 Wh/kg at specific power of 375 W/kg.
- 2D heterostructure,
- Ni₂P/rGO,
- Electrochemical active,
- Supercapacitor,
- DFT
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In-situ conversion of Ni2P/rGO from heterogeneous self-assembled NiO/rGO precursor with boosted pseudocapacitive performance

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通讯作者: 陈斌, bchen63@163.com

In-situ conversion of Ni₂P/rGO from heterogeneous self-assembled NiO/rGO precursor with boosted pseudocapacitive performance