Effect of Molecular Weight and Salt Concentration on Conductivity of Block Copolymer Electrolytes

2009 ◽  
Vol 42 (13) ◽  
pp. 4632-4637 ◽  
Author(s):  
Ashoutosh Panday ◽  
Scott Mullin ◽  
Enrique D. Gomez ◽  
Nisita Wanakule ◽  
Vincent L. Chen ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Salt Concentration ◽  
Block Copolymer Electrolytes

scholarly journals Interplay between Mechanical and Electrochemical Properties of Block Copolymer Electrolytes and its Effect on Stability against Lithium Metal Electrodes

2021 ◽  
Author(s):  
Vivaan Patel ◽  
Jacqueline Maslyn ◽  
Saheli Chakraborty ◽  
Gurmukh K Sethi ◽  
Irune Villalengua ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Electrochemical Properties ◽  
Current Density ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Limiting Current ◽  
Conducting Phase ◽  
Limiting Current Density ◽  
Block Copolymer Electrolytes ◽  
Oligomeric Silsesquioxane

Abstract We have studied the cycle life of two polyhedral oligomeric silsesquioxane-b-poly(ethylene oxide)-b-polyhedral oligomeric silsesquioxane (POSS-PEO-POSS) block copolymer electrolytes differing primarily in molecular weights and composition using lithium/polymer/lithium symmetric cells. The higher molecular weight electrolyte, labeled H, has a higher storage modulus, Gel. However, the volume fraction of the conducting phase in the low molecular weight electrolyte, labeled L, is higher and this leads to a four-fold increase in limiting current density, iL. Measurement of ionic conductivity provides insight into the reason for the observed differences in limiting current density. The average lifetime of symmetric cells with electrolyte L was slightly higher than that of cells with electrolyte H. The combined effect of mechanical and electrochemical properties of electrolytes on the stability of lithium electrodeposition was quantified by examining two dimensionless parameters, i/iL and Gel/GLi, introduced in the theory developed by Barai and Srinivasan [Phys. Chem. Chem. Phys., 19, 20493–20505 (2017)]. This theory predicts the regime of stable lithium electrodeposition as a function of these two parameters. Despite large differences in Gel and iL between the two electrolytes, we show that similar cell lifetimes are consistent with the theoretical predictions of unstable lithium electrodeposition without resorting to any adjustable parameters.

Ionic Conductivity of Low Molecular Weight Block Copolymer Electrolytes

2013 ◽  
Vol 46 (3) ◽  
pp. 914-921 ◽  
Author(s):  
Rodger Yuan ◽  
Alexander A. Teran ◽  
Inna Gurevitch ◽  
Scott A. Mullin ◽  
Nisita S. Wanakule ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Ionic Conductivity ◽  
Low Molecular Weight ◽  
Block Copolymer Electrolytes

Effect of Molecular Weight on the Mechanical and Electrical Properties of Block Copolymer Electrolytes

2007 ◽  
Vol 40 (13) ◽  
pp. 4578-4585 ◽  
Author(s):  
Mohit Singh ◽  
Omolola Odusanya ◽  
Gregg M. Wilmes ◽  
Hany B. Eitouni ◽  
Enrique D. Gomez ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Electrical Properties ◽  
Mechanical And Electrical Properties ◽  
Block Copolymer Electrolytes

scholarly journals Impact of Salt Concentration on Nonuniform Lithium Electrodeposition through Rigid Block Copolymer Electrolytes

2019 ◽  
Vol 11 (51) ◽  
pp. 47878-47885 ◽  
Author(s):  
Louise Frenck ◽  
Jacqueline A. Maslyn ◽  
Whitney S. Loo ◽  
Dilworth Y. Parkinson ◽  
Nitash P. Balsara
Keyword(s):  
Block Copolymer ◽  
Salt Concentration ◽  
Rigid Block ◽  
Block Copolymer Electrolytes

scholarly journals The multiple complexes formed by the interaction of platelet factor 4 with heparin

1980 ◽  
Vol 191 (3) ◽  
pp. 769-776 ◽  
Author(s):  
P E Bock ◽  
M Luscombe ◽  
S E Marshall ◽  
D S Pepper ◽  
J J Holbrook
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Chain Length ◽  
Salt Concentration ◽  
Human Platelet ◽  
Platelet Factor 4 ◽  
High Protein ◽  
Platelet Factor ◽  
The Stability ◽  
Very High

The anisotropy of the fluorescence of dansyl (5-dimethylaminonaphthalene-1- sulphonyl) groups covalently attached to human platelet factor 4 was used to detect the macromolecular compounds formed when the factor was mixed with heparin. At low heparin/protein ratios a very-high-molecular-weight compound (1) was formed that dissociated to give a smaller compound (2) when excess heparin was added. 2. A large complex was also detected as a precipitate that formed at high protein concentrations in chloride buffer. It contained 15.7% (w/w) polysaccharide, equivalent to four or five heparin tetrasaccharide units per protein tetramer. In this complex, more than one molecule of protein binds to each heparin molecule of molecular weight greater than about 6 × 10(3).3. The stability of these complexes varied with pH, salt concentration and the chain length of the heparin. The limit complexes found in excess of the larger heparins consisted of only one heparin molecule per protein tetramer, and the failure to observe complexes with four heparin molecules/protein tetramer is discussed.

scholarly journals Facile Synthesis of a High Molecular Weight Amphiphilic Aramid–ROMP Block Copolymer

2017 ◽  
Vol 50 (23) ◽  
pp. 9307-9314 ◽  
Author(s):  
Michael Badoux ◽  
Susanne Drechsler ◽  
Subhajit Pal ◽  
Andreas F. M. Kilbinger
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Facile Synthesis
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