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.com
Volume 5, Issue 6 (Suppl)
J Mat. Sci.
ISSN: 2321-6212
Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13
TH
INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
In situ
synthesis of vertical standing nanosized NiO encapsulated in graphene as electrodes for high-
performance super-capacitors
Jinghuang Lin, Junlei Qi, Jian Cao, Lixia Zhang and Jicai Feng
Harbin Institute of Technology, China
N
ickel Oxide (NiO) is a promising electrode material for super-capacitors because of its low cost, high abundance, ultrahigh
theoretical specific capacitance and environmental friendliness, but the poor electrical conductivity of NiO has led to a
somewhat unsatisfactory capacitance, with inferior rate and cycling performances. Herein, we rationally design and synthesize
the novel vertically standing NiO based hetero-structure electrodes, which consists of nanosized NiO as core and graphene
layer as shell (G-NiO). The
in situ
formed graphene acts as binder to encapsulate vertically standing NiO nanoparticles as
core-shell structure, which can significantly promote fast ion and electron exchange, further enhancing the electrochemical
performances. This unique vertical standing structure of G-NiO nanocomposites can not only provide a large accessible
contact area between the electrolyte and active materials, but also has the benefits of short ion diffusion path and good charge
transport. Benefiting from such a unique structure, an interconnected graphene conductive network
in situ
formed on the
surface of NiO can digest possible volume changes during long-time reactions so that it can lead to superior cyclic stability.
Consequently, the optimized G-NiO hybrid electrodes exhibited a remarkably enhanced specific capacitance and excellent
cycling performance.
Biography
Jinghuang Lin has completed his Masters from Harbin Institute of Technology, China. His researches mainly focus on the carbon nanomaterials for energy storage
devices and carbon nanomaterials.
linjinghuang4@163.comJinghuang Lin et al., J Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-008