Sulfur-infiltrated porous carbon microspheres with controllable multi-modal pore size distribution for high energy lithium–sulfur batteries

Nanoscale ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 882-888 ◽  
Author(s):  
Cunyu Zhao ◽  
Lianjun Liu ◽  
Huilei Zhao ◽  
Andy Krall ◽  
Zhenhai Wen ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Porous Carbon ◽  
High Energy ◽  
Carbon Microspheres ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

scholarly journals Modeling and Simulations of the Sulfur Infiltration in Activated Carbon Fabrics during Composite Cathode Fabrication for Lithium-Sulfur Batteries

2021 ◽  
Vol 5 (3) ◽  
pp. 65
Author(s):  
Kyriakos Lasetta ◽  
Joseph Paul Baboo ◽  
Constantina Lekakou
Keyword(s):  
Activated Carbon ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Composite Cathode ◽  
High Energy ◽  
High Energy Density ◽  
Plate Temperature ◽  
Energy Simulations ◽  
Lithium Sulfur

During the manufacture of a composite cathode for lithium-sulfur (Li-S) batteries it is important to realize homogeneous infiltration of a specified amount of sulfur, targeted to be at least 5 mg cm−2 to achieve good battery performance in terms of high energy density. A model of the sulfur infiltration is presented in this study, taking into account the pore size distribution of the porous cathode host, phase transitions in sulfur, and formation of different sulfur allotropes, depending on pore size, formation energy and available thermal energy. Simulations of sulfur infiltration into an activated carbon fabric at a hot-plate temperature of 175 °C for two hours predicted a composite cathode with 41 wt% sulfur (8.3 mg cm−2), in excellent agreement with the experiment. The pore size distribution of the porous carbon host proved critical for both the extent and form of retained sulfur, where pores below 0.4 nm could not accommodate any sulfur, pores between 0.4 and 0.7 nm retained S4 and S6 allotropes, and pores between 0.7 and 1.5 nm contained S8.

Preparation of sulfur/multiple pore size porous carbon composite via gas-phase loading method for lithium-sulfur batteries

2014 ◽  
Vol 137 ◽  
pp. 411-415 ◽  
Author(s):  
Long-Yan Li ◽  
Yan-Xiao Chen ◽  
Xiao-Dong Guo ◽  
Ben-He Zhong ◽  
Yan-Jun Zhong
Keyword(s):  
Pore Size ◽  
Gas Phase ◽  
Porous Carbon ◽  
Carbon Composite ◽  
Loading Method ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

scholarly journals Three-Dimensional Hierarchical Porous Carbon Derived from Natural Resources for Highly Efficient Treatment of Polluted Water

2021 ◽  
Author(s):  
Jiaxin Li ◽  
Rudolf Holze ◽  
Simbarashe Moyo ◽  
Song Wang ◽  
Sanxi Li ◽  
...  
Keyword(s):  
Specific Surface ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Specific Surface Area ◽  
Porous Carbon ◽  
Polluted Water ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous

Abstract In this work, a series of three-dimensional (3D) porous carbon nanomaterial with large specific surface area and hierarchical pores were selectively prepared from biomass with varied properties obtained by tuning the carbonization temperature and activation agent. The optimized carbon sample (PC-500-6) exhibits a typical hierarchical porous structure with a high specific surface area (3203 m2/g) and pore size distribution in the range 0.8 to 3.0 nm, which shows excellent adsorption performance for methylene blue (MB) from an aqueous solution. The maximum adsorption capacity even reaches 917.43 mg/g, which is among one of the best results up to now. Through analysis of the adsorption data, it is found that the corresponding adsorption kinetic fits the pseudo-second-order model very well. The present results demonstrate that biomass-derived hierarchical porous carbon has a real potential application for wastewater treatment.Background:Dealing with the ever-increasing water pollution has become an urgent global problem, especially the organic containing polluted water. The physical adsorption has become one of the most popular ways for removal of organic dyes from wastewater due to its low cost as well as high efficiency. However, the adsorption performance is still limited by the low specific surface area (SSA) and unsuitable pore size. Hence, it is still a challenge to synthesize active carbon (AC) with high SSA, suitable pore size distribution as well as low cost for polluted water treatment. Here, we report an efficient method to prepare AC with large SSA from jujube for removal of MB in aqueous solution. The present results demonstrate that biomass-derived hierarchical porous carbon has a real potential application for wastewater treatment.Results:The as-prepared hierarchical porous structure carbon material (PC-500-6) shows a high specific surface area (3203 m2/g) and pore size distribution in the range 0.8 to 3.0 nm, while exhibits an enhanced adsorption performance for methylene blue (MB) from an aqueous solution. The maximum adsorption capacity even reaches 917.43 mg/g, which was calculated from Langmuir model. Through analysis of the adsorption data, it is found that the corresponding adsorption kinetic fits the pseudo-second-order model very well.Conclusions:It can be concluded that the adsorption of MB has a strong correlation with SSA, pore size distribution as well as the pore volume. The present study paved a practical way for wastewater treatment by using biomass-derived hierarchical porous carbon.

Moisture Buffering Potential of Plasters for Energy Efficiency in Modern Buildings

2017 ◽  
Author(s):  
Jan Fořt ◽  
Magdaléna Doleželová ◽  
Robert Černý
Keyword(s):  
Relative Humidity ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Open Porosity ◽  
Building Materials ◽  
High Energy ◽  
Building Envelopes ◽  
Moisture Buffering ◽  
Ventilation Systems

Moisture level significantly affects durability of constructions, their thermal performance and quality of indoor air. Since building envelopes are subjected to a moisture gradient, additional ventilation systems are employed to maintain relative humidity on the desired level. Although modern advanced ventilation systems provide sufficient air exchange rate, their wider application is in conflict with sustainability development principles due to high energy demands. Moreover, according to the European legislation related to the Nearly Zero Energy Buildings (European Directives 2002/91/EC and 2010/31/EU), air tightness of building envelopes in order to provide high thermal resistance leads to large moisture loads in building interiors. Among other factors, a high level of relative humidity has negative effect on the work efficiency and health of building inhabitants. A detailed insight into building materials behavior during cyclic moisture loading was accessed within this study. The moisture buffering values of three interior plasters were investigated in order to describe influence of plasters on moderation of indoor environment. Particular materials were loaded according to the NORDTEST protocol by 8/16 h loading schema at 70/30% RH. Here, the excellent moisture buffer classification was obtained for lightweight perlite plaster (PT) with the highest total open porosity. However, contrary to the higher total open porosity of renovation plaster (PS), the core plaster (CP) achieved higher moisture buffer capacity than PS. This discrepancy refers to the influence of the pore size distribution which is, besides the total open porosity, essential for a detailed characterization of moisture buffering potential of building materials. Based on the results of Mercury intrusion porosimetry, a correlation between pore size distribution and moisture buffer value was revealed.

Biological cell derived N-doped hollow porous carbon microspheres for lithium–sulfur batteries

2016 ◽  
Vol 4 (40) ◽  
pp. 15612-15620 ◽  
Author(s):  
Yanping Xie ◽  
Liang Fang ◽  
Hongwei Cheng ◽  
Chenji Hu ◽  
Hongbin Zhao ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Yeast Cells ◽  
Biological Cell ◽  
Carbon Microspheres ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

A green self-templating approach was designed to fabricate N-doped hollow porous carbon microspheres (NHPCMs) through renewable yeast cells for encapsulating sulfur.

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