scholarly journals Structural analysis of IPC zeolites and related materials using positron annihilation spectroscopy and high-resolution argon adsorption

2016 ◽  
Vol 18 (22) ◽  
pp. 15269-15277 ◽  
Author(s):  
J. Jagiello ◽  
M. Sterling ◽  
P. Eliášová ◽  
M. Opanasenko ◽  
A. Zukal ◽  
...  
Keyword(s):  
Structural Analysis ◽  
High Resolution ◽  
Pore Size ◽  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Size Analysis ◽  
Pore Size Analysis ◽  
Argon Adsorption

Precise pore size analysis of isoreticular series of UTL related zeolites is performed using high-resolution argon adsorption and positron annihilation spectroscopy.

Pore Size Analysis of MCM-41 Type Adsorbents by Means of Nitrogen and Argon Adsorption

1998 ◽  
Vol 207 (1) ◽  
pp. 159-169 ◽  
Author(s):  
Alexander V. Neimark ◽  
Peter I. Ravikovitch ◽  
Michael Grün ◽  
Ferdi Schüth ◽  
Klaus K. Unger
Keyword(s):  
Pore Size ◽  
Size Analysis ◽  
Pore Size Analysis ◽  
Argon Adsorption ◽  
Mcm 41

scholarly journals The Synthesis and Electrochemical Performance of Si Composite with Hollow Carbon Microtubes by the Carbonization of Milkweed from Nature as Anode Template for Lithium Ion Batteries

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5124
Author(s):  
Eun Hyuk Chung ◽  
Jong Pil Kim ◽  
Hyun Gyu Kim ◽  
Jae-Min Chung ◽  
Sei-Jin Lee ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Electrochemical Performance ◽  
Pore Size ◽  
Lithium Ion Batteries ◽  
Polyvinylidene Fluoride ◽  
Lithium Ion ◽  
Size Analysis ◽  
Pore Size Analysis ◽  
Hollow Carbon

It has been reported that improving electrical conductivity and maintaining stable structure during discharge/charge process are challenge for Si to be used as an anode for lithium ion batteries (LIB). To address this problem, milkweed (MW) was carbonized to prepare hollow carbon microtubes (HCMT) derived from biomass as an anode template for LIB. In order to improve electrical conductivity, various materials such as chitosan (CTS), agarose, and polyvinylidene fluoride (PVDF) are used as carbon source (C1, C2, and C3) by carbonization. Carbon coated HCMT@Si composits, HCMT@Si@C1, HCMT@Si@C1@C2, and HCMT@Si@C1@C3, have been successfully synthesized. Changes in structure and crystallinity of HCMT@Si composites were characterized by using X-ray diffraction (XRD). Specific surface area for samples was calculated by using BET (Brunauer–Emmett–Teller). Also, pore size and particle size were obtained by particle and pore size analysis system. The surface morphology was evaluated using high resolution scanning electron microscopy (HR-SEM), Field Emission transmission electron microscopy (TEM). The thermal properties of HCMT@Si composites were analyzed by thermogravimetric analysis (TGA). Our research was performed to study the synthesis and electrochemical performance of Si composite with HCMT by the carbonization of natural micro hollow milkweed to form an inner space. After carbonization at 900 °C for 2 h in N2 flow, inner diameter of HCMT obtained was about 10 μm. The electrochemical tests indicate that HCMT@Si@C1@C3 exhibits discharge capacity of 932.18 mAh/g at 0.5 A/g after 100 cycles.

High resolution positron-annihilation spectroscopy with a new positron microprobe

1997 ◽  
Vol 71 (15) ◽  
pp. 2115-2117 ◽  
Author(s):  
H. Greif ◽  
M. Haaks ◽  
U. Holzwarth ◽  
U. Männig ◽  
M. Tongbhoyai ◽  
...  
Keyword(s):  
High Resolution ◽  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy

Pore Size Analysis of Activated Carbons from Argon and Nitrogen Porosimetry Using Density Functional Theory

Langmuir ◽  
2000 ◽  
Vol 16 (11) ◽  
pp. 5041-5050 ◽  
Author(s):  
Robert J. Dombrowski ◽  
Daniel R. Hyduke ◽  
Christian M. Lastoskie
Keyword(s):  
Density Functional Theory ◽  
Pore Size ◽  
Density Functional ◽  
Activated Carbons ◽  
Size Analysis ◽  
Functional Theory ◽  
Pore Size Analysis
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