Cu3–xNixAl-Layered Double Hydroxide-Reduced Graphene Oxide Nanosheet Array for the Reduction of 4-Nitrophenol

2019 ◽  
Vol 2 (4) ◽  
pp. 2383-2396 ◽  
Author(s):  
Zhuojun Wei ◽  
Yangguang Li ◽  
Liguang Dou ◽  
Muhammad Ahmad ◽  
Hui Zhang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Layered Double Hydroxide ◽  
Nanosheet Array ◽  
Reduced Graphene ◽  
Graphene Oxide Nanosheet ◽  
Double Hydroxide

Integrating ultrathin and modified NiCoAl-layered double-hydroxide nanosheets with N-doped reduced graphene oxide for high-performance all-solid-state supercapacitors

Nanoscale ◽  
2019 ◽  
Vol 11 (20) ◽  
pp. 9896-9905 ◽  
Author(s):  
Fei Liu ◽  
Yuyun Chen ◽  
Ying Liu ◽  
Jianchun Bao ◽  
Min Han ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid State ◽  
Reduced Graphene Oxide ◽  
Layered Double Hydroxide ◽  
High Performance ◽  
Supercapacitive Performance ◽  
Oxygen Abundance ◽  
Reduced Graphene ◽  
Doped Graphene ◽  
Double Hydroxide

This study reports a novel NiCoAl-LDH/N-doped graphene nanohybrid integrating more oxygen abundance and high conductivity, which exhibits superior supercapacitive performance.

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.

Sandwich-like NiCo layered double hydroxide/reduced graphene oxide nanocomposite cathodes for high energy density asymmetric supercapacitors

2019 ◽  
Vol 48 (16) ◽  
pp. 5193-5202 ◽  
Author(s):  
Kai Le ◽  
Zhou Wang ◽  
Fenglong Wang ◽  
Qi Wang ◽  
Qian Shao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Layered Double Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene ◽  
Excellent Cycling Stability ◽  
Double Hydroxide

Lab-synthesized sandwich-like LDH/rGO composites were assembled into asymmetric supercapacitors exhibiting high energy density and excellent cycling stability.

Sign in / Sign up

Export Citation Format

Share Document