Scalable microgel spinning of a three-dimensional porous graphene fiber for high-performance flexible supercapacitors

2020 ◽  
Vol 8 (47) ◽  
pp. 25355-25362
Author(s):  
Wujun Ma ◽  
Wanfei Li ◽  
Min Li ◽  
Qinghui Mao ◽  
Zhenghui Pan ◽  
...  
Keyword(s):  
Cross Section ◽  
High Performance ◽  
Three Dimensional ◽  
Porous Graphene ◽  
Flexible Supercapacitors ◽  
Hierarchical Pores

A three-dimensional porous graphene fiber with a unique cross section and side hierarchical pores is fabricated using a scalable microgel spinning method.

Simplified Analysis of Heat-Curved Steel Girders

2003 ◽  
Vol 1861 (1) ◽  
pp. 101-114
Author(s):  
Antoine N. Gergess ◽  
Rajan Sen
Keyword(s):  
Cross Section ◽  
High Performance ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Steel Bridge ◽  
Temperature Dependent ◽  
Iterative Analysis ◽  
Nonlinear Temperature ◽  
Simplified Analysis ◽  
Single Heating

Heat curving is commonly used in the fabrication of curved structural steel bridge girders. A two-dimensional superposition analysis known as the Duhamel Analogy was used for numerical modeling in the development of the AASHTO code provisions. This iterative analysis can take into consideration multiple heating–cooling cycles, initial residual stresses, temperature-dependent material properties, and the nonlinear temperature distribution across the girder cross section. A simplified analysis based on the Duhamel Analogy that can be carried out by using hand calculations is described. The curvatures obtained by this method are within 15% of the measured curvatures, which are very comparable to the results obtained by using the Duhamel Analogy or the three-dimensional, nonlinear, finite element solution. The background, basis, and steps required for the proposed analysis are described; and an illustrative numerical example is presented. The proposed analysis may be used to estimate curvatures or to determine the maximum fabrication temperature and the heating width for a single heating–cooling cycle for steels such as high-performance steel not covered by the current AASHTO provisions.

Self-assembled three-dimensional interpenetrating porous graphene aerogels with MnO2 coating and their application as high-performance supercapacitors

2013 ◽  
Vol 37 (12) ◽  
pp. 4199 ◽  
Author(s):  
Chen-Chen Ji ◽  
Mao-Wen Xu ◽  
Shu-Juan Bao ◽  
Zheng-Jiang Lu ◽  
Chang-Jun Cai ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Porous Graphene ◽  
Graphene Aerogels ◽  
Self Assembled

Research on Fabricating Technology of Three Dimensional Integrated Braided Composite I Beam

2010 ◽  
Vol 136 ◽  
pp. 59-63 ◽  
Author(s):  
X.Y. Pei ◽  
Jia Lu Li
Keyword(s):  
Cross Section ◽  
High Performance ◽  
Research Result ◽  
Three Dimensional ◽  
Void Content ◽  
Braided Composites ◽  
Braided Composite ◽  
Transfer Molding ◽  
3D Braided Composites

In this paper the fabricating technology of three dimensional (3D) integrated braided composite I beam is researched, including: braiding technology of 3D braided I beam preform, the orientation of fiber-tow in the I beam preform, the optimizing of process parameters of resin transfer molding (RTM) for 3D braided composite I beam, and the design of mould for consolidation of composite I beam. The quality of 3D braided composites is good analyzed by ultrasonic A-scan, void content calculation and microscope observation. The research result will provide a good way for designing and fabricating high performance 3D integrated braided composite components with irregular cross section.

Chemically doped three-dimensional porous graphene monoliths for high-performance flexible field emitters

Nanoscale ◽  
2015 ◽  
Vol 7 (12) ◽  
pp. 5495-5502 ◽  
Author(s):  
Ho Young Kim ◽  
Sooyeon Jeong ◽  
Seung Yol Jeong ◽  
Kang-Jun Baeg ◽  
Joong Tark Han ◽  
...  
Keyword(s):  
Field Emission ◽  
High Performance ◽  
Freeze Drying ◽  
Three Dimensional ◽  
Drying Method ◽  
Porous Graphene ◽  
Field Emitters

High-performance flexible field emission was demonstrated using chemically doped three-dimensional porous graphene monoliths fabricated by a simple freeze-drying method of a highly concentrated graphene/polymer paste containing dopants.

Bismuth nanospheres embedded in three-dimensional (3D) porous graphene frameworks as high performance anodes for sodium- and potassium-ion batteries

2019 ◽  
Vol 7 (9) ◽  
pp. 4913-4921 ◽  
Author(s):  
Xiaolong Cheng ◽  
Dongjun Li ◽  
Ying Wu ◽  
Rui Xu ◽  
Yan Yu
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Potassium Ion ◽  
3D Graphene ◽  
Porous Graphene ◽  
Sodium And Potassium ◽  
Bi Nanoparticles

A robust composite with Bi nanoparticles embedded in 3D graphene frameworks is designed and shows extraordinary performance in Na/K-ion batteries.

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