Nitrogen-Doping-Induced Defects of a Carbon Coating Layer Facilitate Na-Storage in Electrode Materials

2014 ◽  
Vol 5 (1) ◽  
pp. 1400982 ◽  
Author(s):  
Wei Shen ◽  
Cong Wang ◽  
Qunjie Xu ◽  
Haimei Liu ◽  
Yonggang Wang
Keyword(s):  
Carbon Coating ◽  
Nitrogen Doping ◽  
Electrode Materials ◽  
Coating Layer ◽  
Induced Defects

Fabrication of nitrogen-doped hierarchical porous carbons from Sargassum as advanced electrode materials for supercapacitors

2021 ◽  
Author(s):  
Feiqiang Guo ◽  
Yinbo Zhan ◽  
Xiaopeng Jia ◽  
Huiming Zhou ◽  
Shuang Liang ◽  
...  
Keyword(s):  
High Performance ◽  
Nitrogen Doping ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Koh Activation ◽  
Porous Carbons ◽  
Nitrogen Doped ◽  
Novel Approach ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons

Using Sargassum as the precursor, a novel approach was developed to synthesize three-dimensional porous carbons as high-performance electrode materials for supercapacitors via KOH activation and subsequent nitrogen-doping employing melamine as...

Porous nitrogen-doped hollow carbon spheres derived from polyaniline for high performance supercapacitors

2014 ◽  
Vol 2 (15) ◽  
pp. 5352-5357 ◽  
Author(s):  
Jinpeng Han ◽  
Guiyin Xu ◽  
Bing Ding ◽  
Jin Pan ◽  
Hui Dou ◽  
...  
Keyword(s):  
Porous Structure ◽  
High Performance ◽  
Nitrogen Doping ◽  
Electrode Materials ◽  
Carbon Spheres ◽  
Hierarchical Porous Structure ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

The porous nitrogen-doped hollow carbon spheres derived from polyaniline are promising electrode materials for high performance supercapacitors due to their hierarchical porous structure and nitrogen-doping.

Dual tuning of nickel sulfide nanoflake array electrocatalyst through nitrogen doping and carbon coating for efficient and stable water splitting

2019 ◽  
Vol 9 (12) ◽  
pp. 3099-3108 ◽  
Author(s):  
Qiuyan Hao ◽  
Shiyun Li ◽  
Hui Liu ◽  
Jing Mao ◽  
Ying Li ◽  
...  
Keyword(s):  
Water Splitting ◽  
Carbon Coating ◽  
Nitrogen Doping ◽  
Nickel Sulfide ◽  
Nitrogen Incorporation ◽  
Enhanced Activity

Simultaneous carbon coating and nitrogen incorporation of a Ni3S2 nanoflake array electrocatalyst with enhanced activity and stability for water splitting.

scholarly journals Tests under irradiation of optical fibers and cables devoted to corium monitoring in case of severe accident in a Nuclear Power Plant

2020 ◽  
Vol 225 ◽  
pp. 08006
Author(s):  
G. Cheymol ◽  
L. Maurin ◽  
L. Remy ◽  
V. Arounassalame ◽  
H. Maskrot ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Nuclear Power ◽  
Carbon Coating ◽  
Hydrogen Diffusion ◽  
Coating Layer ◽  
Distributed Sensing ◽  
Severe Accident ◽  
Normal Operation ◽  
The Status

The DISCOMS project, which stands for “DIstributed Sensing for COrium Monitoring and Safety”, considers the potential of distributed sensing technologies, based on remote instrumentations and Optical Fiber Sensing cables embedded into the concrete floor under the reactor vessel, to monitor the status of this third barrier of confinement. This paper focuses on the selection and testing of singlemode (SM) optical fibers with limited RIA (Radiation Induced Attenuation) to be compliant with remote distributed instruments optical budgets, the ionizing radiation doses to sustain, and their reduction provided by the concrete basemat shielding. The tests aimed at exposing these fibers and the corresponding sensitive optical cables, to the irradiation doses expected during the normal operation of the reactor (up to 60 years for the European Pressurized Reactor), followed by a severe accident. Several gamma and mixed (neutron-gamma) irradiations were performed at CEA Saclay facilities: POSÉÏDON irradiator and ISIS reactor, up to a gamma cumulated dose of about 2 MGy and fast neutron fluence (E > 1 MeV) of 6 x 1015 n/cm2. The first gamma test permitted to assess the RIA at various optical wavelengths, and to select three radiation tolerant singlemode fibers (RIA < 5 dB/100 m, at 1550 nm operating wavelength). The second one was performed on voluminous strands of sensitive cables encapsulating the selected optical fibers, up to approximately the same accumulated dose, at two temperatures: 30°C and 80°C. A significant increase of the RIA, without any saturation tendency, appeared for fibers inserted into cables, correlated with the increase of the hydroxyl attenuation peak at 1380 nm. Molecular hydrogen generated by the radiolysis of compounds of the cable is at the origin of this phenomenon. A third gamma irradiation run permitted to measure the radiolytic hydrogen production yield of some compounds of a dedicated temperature cable sample. The efficiency of a carbon coating layer over the silica cladding, acting as a barrier against hydrogen diffusion, was also successfully confirmed. Finally, the efficiency of this carbon coating layer has also been tested under neutron irradiation, then qualified as a protection barrier against hydrogen diffusion in the optical fiber cores.

A new room temperature and solvent free carbon coating procedure for battery electrode materials

2013 ◽  
Vol 6 (11) ◽  
pp. 3363 ◽  
Author(s):  
Alexandre Ponrouch ◽  
Alejandro R. Goñi ◽  
Moulay T. Sougrati ◽  
Mohamed Ati ◽  
Jean-Marie Tarascon ◽  
...  
Keyword(s):  
Carbon Coating ◽  
Room Temperature ◽  
Electrode Materials ◽  
Free Carbon ◽  
Solvent Free ◽  
Battery Electrode ◽  
Coating Procedure

Improving lithium–sulfur battery performance via a carbon-coating layer derived from the hydrothermal carbonization of glucose

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 50983-50988 ◽  
Author(s):  
Songtao Zhang ◽  
Nianwu Li ◽  
Hongling Lu ◽  
Jiafei Zheng ◽  
Rui Zang ◽  
...  
Keyword(s):  
Carbon Coating ◽  
Coating Layer ◽  
Hydrothermal Carbonization ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

After wrapping AC–S with a carbon-coating layer, the obtained composite can effectively confine polysulfides.

scholarly journals Discharged Na5V12O32 Nanowire Arrays Coated with Cu-Cu2O for High Performance Lithium-Ion Batteries

2021 ◽  
Author(s):  
Guangjie Yang ◽  
Mengmeng Cui ◽  
Tao Han ◽  
dong fang ◽  
Xingjie Lu ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
High Performance ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Coating Layer ◽  
Lithium Ion ◽  
Nanowire Arrays ◽  
Battery Electrode ◽  
Cu2o Nanoparticles ◽  
Enhanced Electrochemical Performance

Abstract Sodium vanadate have been widely used as a lithium-ion battery anode. However, its further application is restricted by the capacity attenuation during cycles because of its easy solubility in electrolyte, huge structural change, and low conductivity. Here, a lithium-ion battery electrode based on Cu-Cu2O coated Na5V12O32 nanowire arrays using a predischarge-electrodeposition method is freported. Remarkably, in the Cu-Cu2O@Na5V12O32 electrode, the Na5V12O32 nanowires function as the skeleton, and Cu-Cu2O nanoparticles function as the coating layer. At a specific current of 50 mA g-1, the composite electrode exhibits discharge and charge capacity of 837 and 821 mAh g-1 after 80 cycles, respectively, which is much higher than that of the Na5V12O32 nanowires electrode. This research provides a new pathway to explore electrode materials with enhanced electrochemical performance.

Sign in / Sign up

Export Citation Format

Share Document