scholarly journals One-Step Hydrothermal Synthesis of Nickel/Cobalt Double Hydroxide Composite Containing Reduced Graphene Oxide as High Perfomance Electrode Material for Supercapacitor

2017 ◽  
pp. 3589-3596 ◽  
Author(s):  
Guoping Wang ◽  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
Nickel Cobalt ◽  
Reduced Graphene ◽  
One Step ◽  
Double Hydroxide

Facile Synthesis of Ni–Mn Layered Double Hydroxide Nanopetals on 3D Reduced Graphene Oxide/Ni Foam for High-Performance Supercapacitors

NANO ◽  
2020 ◽  
Vol 15 (02) ◽  
pp. 2050021
Author(s):  
Qi Tang ◽  
Menghan Ye ◽  
Li Ma ◽  
Tao Zhou ◽  
Mengyu Gan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Layered Double Hydroxide ◽  
Electrode Material ◽  
Active Sites ◽  
Retention Rate ◽  
Ni Foam ◽  
Reduced Graphene ◽  
Capacitance Performance ◽  
Double Hydroxide

In this work, the Ni–Mn layered double hydroxide (Ni–Mn LDH) nanopetals are fabricated on three-dimensional reduced graphene oxide/Ni foam (RGO/NF) by one-step hydrothermal method, in which the suspension of graphene oxide (GO) is directly reduced by nickel foam (NF) to obtain NF/RGO. The composite, which consists of interconnected Ni–Mn LDH nanopetals, forms a macroporous structure. Such an open space can promote electrolyte dispersion and ion diffusion of active substances, thus enhancing capacitance performance. Remarkable, during crystal growth, RGO can not only provide active sites for Ni–Mn LDH nanopetals, but also effectively connect Ni–Mn LDH nanopetals to NF, further promoting the electrochemical behavior of composite material. Moreover, RGO possess reasonable chemical stability which can improve the mechanical properties of the composite to obtain good stability. The experimental results show that the NF/RGO electrode material with Ni–Mn LDH nanopetals has excellent specific capacitance of 2250[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], good rate performance (the capacitance retention rate is still 64.0% at 10[Formula: see text]A[Formula: see text]g[Formula: see text] and excellent cycle life (45.1% at 10[Formula: see text]A[Formula: see text]g[Formula: see text] after 5000 cycles). NR/NM–LDH is used as the positive electrode and activated carbon is used as the negative electrode to assemble the asymmetric supercapacitor, the proper power density and energy density indicates that the NR/NM–LDH composite has great potential as an electrode material for supercapacitors.

One step hydrothermal synthesis of TiO2-reduced graphene oxide sheets

2011 ◽  
Vol 21 (10) ◽  
pp. 3415 ◽  
Author(s):  
Jianfeng Shen ◽  
Bo Yan ◽  
Min Shi ◽  
Hongwei Ma ◽  
Na Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
One Step ◽  
Graphene Oxide Sheets

scholarly journals One-step hydrothermal synthesis of NiS/MoS2-rGO composites and their application as catalysts for hydrogen evolution reaction

2016 ◽  
Vol 09 (05) ◽  
pp. 1650058 ◽  
Author(s):  
Huaping Wu ◽  
Ye Qiu ◽  
Junma Zhang ◽  
Guozhong Chai ◽  
Congda Lu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Layer Structures ◽  
Reduced Graphene ◽  
One Step

The composites of sulphide and reduced graphene oxide (NiS/MoS2-rGO) were synthesized through a facile solvent-assisted hydrothermal method. The introduction of NiS was paramount not only in enhancing the conductivity of whole catalysts but also in modulating the layer structures of MoS2 with additional active sites. Moreover, the NiS and rGO functioned together in controlling the morphology of as-prepared composites, resulting in uniformly distributed NiS/MoS2 nanosheets perpendicular to rGO scaffold. This further contributed to the excellent hydrogen evolution performance of the composites with a small onset overpotential of 80[Formula: see text]mV and Tafel slope as low as 65[Formula: see text]mV/decade.

Hydrothermal synthesis of Fe3O4/RGO composites and investigation of electrochemical performances for energy storage applications

RSC Advances ◽  
2014 ◽  
Vol 4 (84) ◽  
pp. 44777-44785 ◽  
Author(s):  
Sanjit Saha ◽  
Milan Jana ◽  
Pranab Samanta ◽  
Naresh Chandra Murmu ◽  
Nam Hoon Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Electrochemical Performances ◽  
Reduced Graphene ◽  
One Step ◽  
Energy Storage Applications ◽  
Highly Porous

Highly porous nano-structured Fe3O4 particles were successfully prepared on the surface of reduced graphene oxide (RGO) sheets through a one-step hydrothermal method.

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