scholarly journals Large-Scale, Three–Dimensional, Free–Standing and Mesoporous Metal Oxide Networks for High–Performance Photocatalysis

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Hua Bai ◽  
Xinshi Li ◽  
Chao Hu ◽  
Xuan Zhang ◽  
Junfang Li ◽  
...  
Keyword(s):  
Metal Oxide ◽  
High Performance ◽  
Large Scale ◽  
Three Dimensional ◽  
Free Standing ◽  
Mesoporous Metal ◽  
Mesoporous Metal Oxide

Three-Dimensional MoS2/Graphene Hybrid Aerogel as Free-Standing, High-Performance Electrode for Supercapacitor

NANO ◽  
2020 ◽  
Vol 15 (05) ◽  
pp. 2050062
Author(s):  
Zhaolei Meng ◽  
Xiaojian He ◽  
Song Han ◽  
Zijian Hu
Keyword(s):  
Porous Structure ◽  
Surface Area ◽  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Three Dimensional ◽  
Rate Capability ◽  
Free Standing ◽  
Hybrid Aerogel

Carbon materials are generally employed as supercapacitor electrodes due to their low- cost, high-chemical stability and environmental friendliness. However, the design of carbon structures with large surface area and controllable porous structure remains a daunt challenge. In this work, a three-dimensional (3D) hybrid aerogel with different contents of MoS2 nanosheets in 3D graphene aerogel (MoS2-GA) was synthesized through a facial hydrothermal process. The influences of MoS2 content on microstructure and subsequently on electrochemical properties of MoS2-GA are systematically investigated and an optimized mass ratio with MoS2: GA of 1:2 is chosen to achieve high mechanical robustness and outstanding electrochemical performance in the hybrid structure. Due to the large specific surface area, porous structure and continuous charge transfer network, such MoS2-GA electrodes exhibit high specific capacitance, good rate capability and excellent cyclic stability, showing great potential in large-scale and low-cost fabrication of high-performance supercapacitors.

scholarly journals Superior Pseudocapacitive Storage of a Novel Ni3Si2/NiOOH/Graphene Nanostructure for an All-Solid-State Supercapacitor

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Jing Ning ◽  
Maoyang Xia ◽  
Dong Wang ◽  
Xin Feng ◽  
Hong Zhou ◽  
...  
Keyword(s):  
Solid State ◽  
High Performance ◽  
Large Scale ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Specific Area ◽  
High Energy ◽  
Scale Production ◽  
Free Standing

Abstract Recent developments in the synthesis of graphene-based structures focus on continuous improvement of porous nanostructures, doping of thin films, and mechanisms for the construction of three-dimensional architectures. Herein, we synthesize creeper-like Ni3Si2/NiOOH/graphene nanostructures via low-pressure all-solid melting-reconstruction chemical vapor deposition. In a carbon-rich atmosphere, high-energy atoms bombard the Ni and Si surface, and reduce the free energy in the thermodynamic equilibrium of solid Ni–Si particles, considerably catalyzing the growth of Ni–Si nanocrystals. By controlling the carbon source content, a Ni3Si2 single crystal with high crystallinity and good homogeneity is stably synthesized. Electrochemical measurements indicate that the nanostructures exhibit an ultrahigh specific capacity of 835.3 C g−1 (1193.28 F g−1) at 1 A g−1; when integrated as an all-solid-state supercapacitor, it provides a remarkable energy density as high as 25.9 Wh kg−1 at 750 W kg−1, which can be attributed to the free-standing Ni3Si2/graphene skeleton providing a large specific area and NiOOH inhibits insulation on the electrode surface in an alkaline solution, thereby accelerating the electron exchange rate. The growth of the high-performance composite nanostructure is simple and controllable, enabling the large-scale production and application of microenergy storage devices.

Immobilization of a Molecular Cobaloxime Catalyst for Hydrogen Evolution on a Mesoporous Metal Oxide Electrode

2012 ◽  
Vol 124 (51) ◽  
pp. 12921-12925 ◽  
Author(s):  
Nicoleta M. Muresan ◽  
Janina Willkomm ◽  
Dirk Mersch ◽  
Yana Vaynzof ◽  
Erwin Reisner
Keyword(s):  
Metal Oxide ◽  
Hydrogen Evolution ◽  
Oxide Electrode ◽  
Mesoporous Metal ◽  
Mesoporous Metal Oxide

scholarly journals Prediction of Residual Stresses in a Multipass Pipe Weld by a Novel 3D Finite Element Approach

2018 ◽  
Author(s):  
Hui Huang ◽  
Jian Chen ◽  
Blair Carlson ◽  
Hui-Ping Wang ◽  
Paul Crooker ◽  
...  
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
High Performance ◽  
Large Scale ◽  
Graphics Processing Unit ◽  
Computational Cost ◽  
Three Dimensional ◽  
Processing Unit ◽  
Girth Welds ◽  
Welding Processes

Due to enormous computation cost, current residual stress simulation of multipass girth welds are mostly performed using two-dimensional (2D) axisymmetric models. The 2D model can only provide limited estimation on the residual stresses by assuming its axisymmetric distribution. In this study, a highly efficient thermal-mechanical finite element code for three dimensional (3D) model has been developed based on high performance Graphics Processing Unit (GPU) computers. Our code is further accelerated by considering the unique physics associated with welding processes that are characterized by steep temperature gradient and a moving arc heat source. It is capable of modeling large-scale welding problems that cannot be easily handled by the existing commercial simulation tools. To demonstrate the accuracy and efficiency, our code was compared with a commercial software by simulating a 3D multi-pass girth weld model with over 1 million elements. Our code achieved comparable solution accuracy with respect to the commercial one but with over 100 times saving on computational cost. Moreover, the three-dimensional analysis demonstrated more realistic stress distribution that is not axisymmetric in hoop direction.

Hepatocyte Aggregate Culture Technique for Bioreactors in Hybrid Liver Support Systems

1993 ◽  
Vol 16 (12) ◽  
pp. 843-846 ◽  
Author(s):  
J.C. Gerlach ◽  
K. Klöppel ◽  
C. MÜller ◽  
N. Schnoy ◽  
M.D. Smith ◽  
...  
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Support Systems ◽  
Three Dimensional ◽  
Culture Technique ◽  
Dimensional Structure ◽  
Cell Aggregates ◽  
Liver Support ◽  
Aggregate Culture

Utilizing a modified culture technique for hepatocytes, a high performance suspension culture is possible in which hepatocytes spontaneously form cell aggregates. The aggregates of 20-100 cells have been histologically confirmed to hold a three-dimensional structure, they show a long-term external metabolism and a survival time comparable with standard adhesion cultures. This technique has several advantages in the construction of large scale bioreactors for hybrid liver support systems.

Catalytic ethanolysis of Xilinguole lignite over layered and mesoporous metal oxide composites to platform chemicals

Fuel ◽  
2021 ◽  
Vol 287 ◽  
pp. 119560
Author(s):  
Zhan-Ku Li ◽  
Hai-Tao Wang ◽  
Hong-Lei Yan ◽  
Jing-Chong Yan ◽  
Zhi-Ping Lei ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Platform Chemicals ◽  
Mesoporous Metal ◽  
Oxide Composites ◽  
Mesoporous Metal Oxide

Synthesis of Mesoporous Metal Oxide by the Thermal Decomposition of Oxalate Precursor

Langmuir ◽  
2013 ◽  
Vol 29 (13) ◽  
pp. 4404-4412 ◽  
Author(s):  
Limin Guo ◽  
Hiroyuki Arafune ◽  
Norio Teramae
Keyword(s):  
Thermal Decomposition ◽  
Metal Oxide ◽  
Oxalate Precursor ◽  
Mesoporous Metal ◽  
Mesoporous Metal Oxide

Porous multishelled NiO hollow microspheres encapsulated within three-dimensional graphene as flexible free-standing electrodes for high-performance supercapacitors

Nanoscale ◽  
2019 ◽  
Vol 11 (34) ◽  
pp. 16071-16079 ◽  
Author(s):  
Zhifang Zhang ◽  
Xiaorui Su ◽  
Yanyan Zhu ◽  
Zhonghui Chen ◽  
Zebo Fang ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Hollow Microspheres ◽  
Free Standing ◽  
Asymmetric Supercapacitors

Well-designed three-dimensional graphene-encapsulated porous multishelled NiO hollow microspheres as flexible free-standing electrodes (3DG/pMS-NiO) were facilely prepared and applied to high-performance asymmetric supercapacitors.

Sign in / Sign up

Export Citation Format

Share Document