Facile synthesis of highly graphitized porous carbon monoliths with a balance on crystallization and pore-structure

2014 ◽  
Vol 2 (32) ◽  
pp. 12785-12791 ◽  
Author(s):  
Shengyang Tao ◽  
Yuchao Wang ◽  
Da Shi ◽  
Yonglin An ◽  
Jieshan Qiu ◽  
...  
Keyword(s):  
Porous Structure ◽  
Pore Structure ◽  
Porous Carbon ◽  
Porous Silica ◽  
Facile Synthesis

A facile method to balance the high graphitization and outstanding porous structure in carbon monolithsviananocasting with porous silica.

scholarly journals Facile Synthesis of Sponge-Like Porous Nano Carbon-Coated Silicon Anode with Tunable Pore Structure for High-Stability Lithium-Ion Batteries

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3211
Author(s):  
Shugui Song ◽  
Jingcang Li ◽  
Anqi Zheng ◽  
Yongqiang Yang ◽  
Kuibo Yin
Keyword(s):  
Porous Structure ◽  
Pore Structure ◽  
High Stability ◽  
Cycling Stability ◽  
Silicon Anode ◽  
Slow Heating ◽  
Facile Synthesis ◽  
Silicon Anodes ◽  
Carbon Coated ◽  
Nano Carbon

To address the challenge of the huge volume expansion of silicon anode, carbon-coated silicon has been developed as an effective design strategy due to the improved conductivity and stable electrochemical interface. However, although carbon-coated silicon anodes exhibit improved cycling stability, the complex synthesis methods and uncontrollable structure adjustment still make the carbon-coated silicon anodes hard to popularize in practical application. Herein, we propose a facile method to fabricate sponge-like porous nano carbon-coated silicon (sCCSi) with a tunable pore structure. Through the strategy of adding water into precursor solution combined with a slow heating rate of pre-oxidation, a sponge-like porous structure can be formed. Furthermore, the porous structure can be controlled through stirring temperature and oscillation methods. Owing to the inherent material properties and the sponge-like porous structure, sCCSi shows high conductivity, high specific surface area, and stable chemical bonding. As a result, the sCCSi with normal and excessive silicon-to-carbon ratios all exhibit excellent cycling stability, with 70.6% and 70.2% capacity retentions after 300 cycles at 500 mA g−1, respectively. Furthermore, the enhanced buffering effect on pressure between silicon nanoparticles and carbon material due to the sponge-like porous structure in sCCSi is further revealed through mechanical simulation. Considering the facile synthesis method, flexible regulation of porous structure, and high cycling stability, the design of the sCCSi paves a way for the synthesis of high-stability carbon-coated silicon anodes.

Facile synthesis of selenium/potassium tartrate derived porous carbon composite as an advanced Li–Se battery cathode

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47486-47490 ◽  
Author(s):  
Chenhao Zhao ◽  
Libin Xu ◽  
Zhibiao Hu ◽  
Sheng'en Qiu ◽  
Kaiyu Liu
Keyword(s):  
Electrochemical Performance ◽  
Porous Structure ◽  
Porous Carbon ◽  
Carbon Composite ◽  
Amorphous Structure ◽  
Facile Synthesis ◽  
Potassium Tartrate

The element Se with amorphous structure is uniformly encapsulated into the porous (micro- and small meso-porous) structure of potassium tartrate derived carbon, the obtained Se/C composite show good electrochemical performance.

scholarly journals Facile synthesis of hierarchically porous carbon for supercapacitor derived from water-soluble pitch

2021 ◽  
Vol 631 ◽  
pp. 012101
Author(s):  
Jinliang Zhang ◽  
Junqing Liu ◽  
Danmiao Kang ◽  
Zhijiang Su ◽  
Wenbin Liang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Water Soluble ◽  
Facile Synthesis ◽  
Hierarchically Porous

Pore structure dependent activity and durability of mesoporous rhodium nanoparticles towards the methanol oxidation reaction

2020 ◽  
Vol 56 (32) ◽  
pp. 4448-4451 ◽  
Author(s):  
Yan Guo ◽  
Shuai Chen ◽  
Yuan Li ◽  
Yunwei Wang ◽  
Houbing Zou ◽  
...  
Keyword(s):  
Porous Structure ◽  
Pore Structure ◽  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Structure Effect ◽  
Methanol Oxidation Reaction ◽  
Rhodium Nanoparticles ◽  
Dependent Activity

A significant porous structure effect of mesoporous rhodium nanoparticles on the electrocatalytic methanol oxidation reaction was reported.

Fabrication of poly (1, 8-octanediol-co-Pluronic F127 citrate)/chitin nanofibril/bioactive glass (POFC/ChiNF/BG) porous scaffold via directional-freeze-casting

2020 ◽  
Vol 40 (7) ◽  
pp. 591-599
Author(s):  
Yaling Tian ◽  
Kai Liang ◽  
Yali Ji
Keyword(s):  
Bioactive Glass ◽  
Porous Structure ◽  
Pore Structure ◽  
Porous Scaffold ◽  
Pluronic F127 ◽  
Porous Scaffolds ◽  
Freeze Casting ◽  
Promising Candidate ◽  
Complete Replacement

AbstractThe citrate-based thermoset elastomer is a promising candidate for bone scaffold material, but the harsh curing condition made it difficult to fabricate porous structure. Recently, poly (1, 8-octanediol-co-Pluronic F127 citrate) (POFC) porous scaffold was creatively fabricated by chitin nanofibrils (ChiNFs) supported emulsion-freeze-casting. Thanks to the supporting role of ChiNFs, the lamellar pore structure formed by directional freeze-drying was maintained during the subsequent thermocuring. Herein, bioactive glass (BG) was introduced into the POFC porous scaffolds to improve bioactivity. It was found the complete replacement of ChiNF particles with BG particles could not form a stable porous structure; however, existing at least 15 wt% ChiNF could ensure the formation of lamellar pore, and the interlamellar distance increased with BG ratios. Thus, the BG granules did not contribute to the formation of pore structure like ChiNFs, however, they surely endowed the scaffolds with enhanced mechanical properties, improved osteogenesis bioactivity, better cytocompatibility as well as quick degradation rate. Reasonably adjusting BG ratios could balance the requirements of porous structure and bioactivity.

Comparative Studies of Ultra Low-κ Porous Silica Films with 2-D Hexagonal and Disordered Pore Structures

2004 ◽  
Vol 812 ◽  
Author(s):  
Nobutoshi Fujii ◽  
Kazuhiro Yamada ◽  
Yoshiaki Oku ◽  
Nobuhiro Hata ◽  
Yutaka Seino ◽  
...  
Keyword(s):  
Pore Structure ◽  
Nonionic Surfactants ◽  
Porous Silica ◽  
Silica Film ◽  
X Ray Diffraction ◽  
Silica Films ◽  
X Ray ◽  
X Ray Scattering ◽  
Porous Silica Film ◽  
Diffraction Peaks

AbstractPeriodic 2-dimensional (2-D) hexagonal and the disordered pore structure silica films have been developed using nonionic surfactants as the templates. The pore structure was controlled by the static electrical interaction between the micelle of the surfactant and the silica oligomer. No X-ray diffraction peaks were observed for the disordered mesoporous silica films, while the pore diameters of 2.0-4.0 nm could be measured by small angle X-ray scattering spectroscopy. By comparing the properties of the 2-D hexagonal and the disordered porous silica films which have the same porosity, it is found that the disordered porous silica film has advantages in terms of the dielectric constant and Young's modulus as well as the hardness. The disordered porous silica film is more suitable for the interlayer dielectrics for ULSI.

Facile synthesis and capacitance properties of N-doped porous carbon/iron oxide composites through the single-step pyrolysis of coal-based polyaniline

2017 ◽  
Vol 25 (3) ◽  
pp. 845-853 ◽  
Author(s):  
Xiaoqin Wang ◽  
Yufei Yang ◽  
Yong Zhang ◽  
Qiaoqin Li ◽  
Ming Gong ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Porous Carbon ◽  
Single Step ◽  
Facile Synthesis ◽  
Carbon Iron ◽  
Oxide Composites
Sign in / Sign up

Export Citation Format

Share Document