Periodic Three-Dimensional Nitrogen-Doped Mesoporous Carbon Spheres Embedded with Co/Co3O4 Nanoparticles toward Microwave Absorption

2020 ◽  
Vol 12 (21) ◽  
pp. 24102-24111 ◽  
Author(s):  
Chengwei Zhang ◽  
Yue Peng ◽  
Yan Song ◽  
Jianjun Li ◽  
Fuxing Yin ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Mesoporous Carbon ◽  
Three Dimensional ◽  
Co3o4 Nanoparticles ◽  
Carbon Spheres ◽  
Nitrogen Doped

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.

scholarly journals Three-dimensional aligned mesoporous carbon nanotubes filled with Co3O4 nanoparticles for Li-ion battery anode applications

2013 ◽  
Vol 105 ◽  
pp. 110-114 ◽  
Author(s):  
Junsu Park ◽  
Won Gyun Moon ◽  
Gil-Pyo Kim ◽  
Inho Nam ◽  
Soomin Park ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mesoporous Carbon ◽  
Three Dimensional ◽  
Co3o4 Nanoparticles ◽  
Li Ion Battery ◽  
Li Ion ◽  
Battery Anode

One-pot synthesis of nitrogen-doped ordered mesoporous carbon spheres for high-rate and long-cycle life supercapacitors

Carbon ◽  
2018 ◽  
Vol 127 ◽  
pp. 85-92 ◽  
Author(s):  
Jian-Gan Wang ◽  
Hongzhen Liu ◽  
Huanhuan Sun ◽  
Wei Hua ◽  
Huwei Wang ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
Cycle Life ◽  
High Rate ◽  
Carbon Spheres ◽  
One Pot ◽  
Nitrogen Doped ◽  
Long Cycle Life ◽  
One Pot Synthesis ◽  
Ordered Mesoporous

Heterostructured CoO-Co3O4 nanoparticles anchored on nitrogen-doped hollow carbon spheres as cathode catalysts for Li–O2 batteries

Nanoscale ◽  
2019 ◽  
Vol 11 (31) ◽  
pp. 14769-14776 ◽  
Author(s):  
Lixia Feng ◽  
Yongliang Li ◽  
Lingna Sun ◽  
Hongwei Mi ◽  
Xiangzhong Ren ◽  
...  
Keyword(s):  
Cathode Material ◽  
Catalytic Performance ◽  
Co3o4 Nanoparticles ◽  
Carbon Spheres ◽  
Simple Method ◽  
Cathode Catalysts ◽  
Nitrogen Doped ◽  
Lithium Oxygen Battery ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

CoO-Co3O4 nanoparticles coated on nitrogen-doped hollow carbon spheres (N-HC@CoO-Co3O4) are prepared by a simple method, and N-HC@CoO-Co3O4 when used as the cathode material for a lithium–oxygen battery shows high catalytic performance.

Silica-Assisted Assembly for Synthesis of Nitrogen-Doped Hollow Mesoporous Carbon Spheres as Supercapacitors

2017 ◽  
Vol 164 (9) ◽  
pp. A1918-A1923 ◽  
Author(s):  
Yuying Wang ◽  
Juan Du ◽  
Hongliang Zhang ◽  
Lei Liu ◽  
Yifeng Yu ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Carbon Spheres ◽  
Nitrogen Doped

scholarly journals Three-Dimensional Ordered Mesoporous Carbon Spheres Modified with Ultrafine Zinc Oxide Nanoparticles for Enhanced Microwave Absorption Properties

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yan Song ◽  
Fuxing Yin ◽  
Chengwei Zhang ◽  
Weibing Guo ◽  
Liying Han ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Mesoporous Carbon ◽  
Three Dimensional ◽  
Ordered Mesoporous Carbon ◽  
Material Research ◽  
Carbon Spheres ◽  
Zno Nps ◽  
Ordered Mesoporous ◽  
High Efficient ◽  
Microwave Absorbing

AbstractCurrently, electromagnetic radiation and interference have a significant effect on the operation of electronic devices and human health systems. Thus, developing excellent microwave absorbers have a huge significance in the material research field. Herein, a kind of ultrafine zinc oxide (ZnO) nanoparticles (NPs) supported on three-dimensional (3D) ordered mesoporous carbon spheres (ZnO/OMCS) is prepared from silica inverse opal by using phenolic resol precursor as carbon source. The prepared lightweight ZnO/OMCS nanocomposites exhibit 3D ordered carbon sphere array and highly dispersed ultrafine ZnO NPs on the mesoporous cell walls of carbon spheres. ZnO/OMCS-30 shows microwave absorbing ability with a strong absorption (− 39.3 dB at 10.4 GHz with a small thickness of 2 mm) and a broad effective absorption bandwidth (9.1 GHz). The outstanding microwave absorbing ability benefits to the well-dispersed ultrafine ZnO NPs and the 3D ordered mesoporous carbon spheres structure. This work opened up a unique way for developing lightweight and high-efficient carbon-based microwave absorbing materials.

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