Nanoconfinement Induced Formation of Core/Shell Structured Mesoporous Carbon Spheres Coated with Solid Carbon Shell

2013 ◽  
Vol 5 (8) ◽  
pp. 3042-3047 ◽  
Author(s):  
Karolina Wenelska ◽  
Krzysztof Kierzek ◽  
Ryszard J. Kaleńczuk ◽  
Xuecheng Chen ◽  
Ewa Mijowska
Keyword(s):  
Mesoporous Carbon ◽  
Carbon Shell ◽  
Core Shell ◽  
Solid Carbon ◽  
Carbon Spheres

Synthesis of Carbon/Carbon Core/Shell Nanofibers by Co-Pyrolysis of Tetrahydrofuran and Ferrocene

2011 ◽  
Vol 306-307 ◽  
pp. 1211-1214
Author(s):  
Wen Jun Kang ◽  
Hai Bo Li ◽  
Yan Yan ◽  
Yi Tai Qian
Keyword(s):  
Carbon Materials ◽  
Reaction System ◽  
Carbon Shell ◽  
Iron Catalysts ◽  
Core Shell ◽  
Solid Carbon ◽  
Carbon Spheres ◽  
Graphene Layers ◽  
Carbon Core ◽  
20 Nm

Carbon/carbon core/shell nanofibers with length up to several micrometres have been prepared by co-pyrolysis of tetrahydrofuran and ferrocene in a stainless steel autoclave at 600 °C. The diameter of carbon core is ~10 nm, and the thickness of carbon shell is ~20 nm. It is found that the graphene layers of carbon core are perpendicular to the ones of carbon shell in stacking orientation. Comparative experiments confirm that the metallic iron catalysts, originating from the decomposition of ferrocene, are responsible for the formation of nanofibers. When the ferrocene is absence, only solid carbon spheres are observed. Moreover, hollow hexapod-like carbon materials can be obtained with water introduced into reaction system.

Controlled synthesis of N-doped carbon spheres with different morphologies for supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104642-104647 ◽  
Author(s):  
Zuosong Sun ◽  
Shaodian Shen ◽  
Limeng Ma ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Mesoporous Carbon ◽  
Core Shell ◽  
Controlled Synthesis ◽  
General Strategy ◽  
Carbon Spheres ◽  
Carbon Nanospheres ◽  
Nitrogen Doped

A facile and general strategy has been developed to synthesize nitrogen doped mesoporous carbon nanospheres, newly nitrogen doped lychee exocarp-like mesoporous carbon spheres and nitrogen doped core–shell mesoporous carbon spheres.

scholarly journals High Capacity and Fast Kinetics of Potassium-Ion Batteries Boosted by Nitrogen-Doped Mesoporous Carbon Spheres

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jiefeng Zheng ◽  
Yuanji Wu ◽  
Yong Tong ◽  
Xi Liu ◽  
Yingjuan Sun ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Active Sites ◽  
Carbon Materials ◽  
Potassium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Carbon Spheres ◽  
Fast Kinetics ◽  
Nitrogen Doped ◽  
Economic Price

AbstractIn view of rich potassium resources and their working potential, potassium-ion batteries (PIBs) are deemed as next generation rechargeable batteries. Owing to carbon materials with the preponderance of durability and economic price, they are widely employed in PIBs anode materials. Currently, porosity design and heteroatom doping as efficacious improvement strategies have been applied to the structural design of carbon materials to improve their electrochemical performances. Herein, nitrogen-doped mesoporous carbon spheres (MCS) are synthesized by a facile hard template method. The MCS demonstrate larger interlayer spacing in a short range, high specific surface area, abundant mesoporous structures and active sites, enhancing K-ion migration and diffusion. Furthermore, we screen out the pyrolysis temperature of 900 °C and the pore diameter of 7 nm as optimized conditions for MCS to improve performances. In detail, the optimized MCS-7-900 electrode achieves high rate capacity (107.9 mAh g−1 at 5000 mA g−1) and stably brings about 3600 cycles at 1000 mA g−1. According to electrochemical kinetic analysis, the capacitive-controlled effects play dominant roles in total storage mechanism. Additionally, the full-cell equipped MCS-7-900 as anode is successfully constructed to evaluate the practicality of MCS.

Scalable construction of heteroatom-doped and hierarchical core–shell MnO2 nanoflakes on mesoporous carbon for high performance supercapacitor devices

2020 ◽  
Vol 7 (2) ◽  
pp. 411-420
Author(s):  
Xue Bai ◽  
Dianxue Cao ◽  
Hongyu Zhang
Keyword(s):  
Mesoporous Carbon ◽  
High Performance ◽  
High Energy ◽  
Cycling Stability ◽  
Core Shell ◽  
Power Densities ◽  
Shell Composite ◽  
Asymmetric Device

Combining interfacial methods and mesoporous carbon channels, an asymmetric device, using N,S-codoped mesoporous carbon and a MnO2@MC-30 core shell composite, is assembled with high energy, power densities and outstanding cycling stability.

Nitrogen-doped hollow carbon spheres with a wrinkled surface: their one-pot carbonization synthesis and supercapacitor properties

2016 ◽  
Vol 52 (78) ◽  
pp. 11693-11696 ◽  
Author(s):  
Lei Liu ◽  
Shi-Da Xu ◽  
Qing Yu ◽  
Feng-Yun Wang ◽  
Hui-Ling Zhu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Core Shell ◽  
Carbon Spheres ◽  
Melamine Formaldehyde ◽  
One Pot ◽  
Nitrogen Doped ◽  
Wrinkled Surface ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Nitrogen-doped hollow carbon spheres with a wrinkled surface were synthesized through direct pyrolysis of core–shell structured graphene oxide–resol@melamine formaldehyde composites.

Fe@C core–shell and Fe@C yolk–shell particles for effective removal of 4-chlorophenol

2015 ◽  
Vol 3 (7) ◽  
pp. 3988-3994 ◽  
Author(s):  
Xiang Li ◽  
Fangyuan Gai ◽  
Buyuan Guan ◽  
Ye Zhang ◽  
Yunling Liu ◽  
...  
Keyword(s):  
Carbon Shell ◽  
Core Shell ◽  
The Core ◽  
Effective Removal ◽  
Shell Particles

Fe@C yolk–shell particles were synthesized by reducing the core with its own carbon shell to achieve the effective removal of 4-chlorophenol from water.

Hollow Fe3O4@mesoporous carbon core–shell microspheres for efficient sorption of radionuclides

2015 ◽  
Vol 51 (5) ◽  
pp. 2550-2557 ◽  
Author(s):  
Shihao Xu ◽  
Yingguo Zhao ◽  
Fangcai Zheng ◽  
Yuanguang Zhang
Keyword(s):  
Mesoporous Carbon ◽  
Core Shell ◽  
Carbon Core
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