Influence of Clay Addition on Ion Conductivity of Polymeric Electrolyte Composites

2006 ◽  
Vol 111 ◽  
pp. 155-158 ◽  
Author(s):  
Seok Kim ◽  
J.Y. Kang ◽  
Sung Goo Lee ◽  
Jae Rock Lee ◽  
Soo Jin Park
Keyword(s):  
Ionic Conductivity ◽  
Lithium Battery ◽  
Ethylene Carbonate ◽  
Lithium Ion ◽  
Polymeric Electrolyte ◽  
Sodium Cations ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Mmt Clay ◽  
Battery Application

In this work, the polymeric electrolyte composites (PECs) based on poly(ethylene oxide) (PEO), ethylene carbonate (EC) as a plasticizer, and lithium montmorillonite (Li-MMT) clay were fabricated, and investigated for understanding the effects of Li-MMT/EC in the polymer matrix on the ionic conductivity. For a lithium battery application, the native sodium cations in MMT were exchanged for lithium cations. As a result, the lithium ion was intercalated into the layer of the MMT clay, and thus PEO entered the galleries of MMT clay. The ionic conductivity was enhanced with increasing MMT contents due to the immobile MMT clay serving as the anion species and the decreased crystallinity of PEO.

Ion Conductivity of Polymer Electrolytes Based on PEO Containing Li Salt and Additive Salt

2007 ◽  
Vol 119 ◽  
pp. 119-122 ◽  
Author(s):  
Seok Kim ◽  
Eun Ju Hwang ◽  
Soo Jin Park ◽  
Hyung Il Kim
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Ethylene Carbonate ◽  
Lithium Ion ◽  
Close Correlation ◽  
Ion Conductivity ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Ionic Movement ◽  
Solid Type

Solid type polymer electrolyte is in progress of research and development in many ways to improve an ionic conductivity to attain 10-3 S/cm which is possibility of practical use of secondary lithium ion battery. There are two major methods of improving ionic conductivity; either lowering Tg of polymer or lowering the energy of ionic movement. In this work, the solid type polymer electrolyte (SPE) composites, which were composed of poly(ethylene oxide) (PEO), ethylene carbonate (EC) as a plasticizer, lithium salt, and 1-ethyl-3-methylimidazolium hexafluorophosphate (EMI-PF6) as a filler in order to improve the ion conductivity of the SPE, were prepared. The influence of EMI-PF6 contents on the ionic conductivity of the SPE composites was investigated in this work. As a result, the ionic conductivity of the SPE was enhanced by an increase in EMI-PF6 content, and showed the highest ionic conductivity at 40 wt.%. It was thought that there was a close correlation between the mobility of Li+ and EMI content in a SPE composite system.

Holey graphene oxide as filler to improve electrochemical performance of solid polymer electrolytes

2019 ◽  
Vol 9 (9) ◽  
pp. 1055-1061
Author(s):  
Qi Wang ◽  
Zhoujie Zhang ◽  
Fei Shen ◽  
Bin Zhao ◽  
Xiaogang Han
Keyword(s):  
Graphene Oxide ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Solid Polymer Electrolytes ◽  
Cycle Performance ◽  
Solid Polymer ◽  
Electrochemical Window ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Solid polymer electrolytes (SPE) have attracted wide attention of researchers because of their high safety performance and high mechanical strength. In this paper, holey graphene oxide (HGO) was added to poly(ethylene oxide) (PEO) solid polymer electrolytes with lithium bis(trifluoromethane sulfonimide) (LiTFSI) as salt to improve the ionic conductivity of solid polymer electrolytes. It was shown that the addition of holey graphene oxide improved the electrochemical window and ionic conductivity. When the amount of holey graphene oxide was 0 wt%, the ionic conductivity was 2.06 × 10–4 S/cm at 60 °C. In comparison, when the amount of holey graphene oxide was 0.2 wt%, the ionic conductivity was greatly increased to 6.05 × 10–4 S/cm. This was mainly due to the fact that addition of holey graphene oxide reduced the crystallization of polymer and promoted the migration of lithium ion. Meanwhile, the electrochemical window was expanded to 5.2 V and the cycle performance for the batteries was also improved.

Chemically anchored liquid-PEO based block copolymer electrolytes for solid-state lithium-ion batteries

2014 ◽  
Vol 2 (30) ◽  
pp. 11839-11846 ◽  
Author(s):  
J. Rolland ◽  
J. Brassinne ◽  
J.-P. Bourgeois ◽  
E. Poggi ◽  
A. Vlad ◽  
...  
Keyword(s):  
Solid State ◽  
Block Copolymer ◽  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Solid Material ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Oxide Electrolyte

A mechanically clamped liquid-poly(ethylene oxide) electrolyte that combines high ionic conductivity and dimensional integrity of a solid material is designed.

Ion Conducting Behaviors of Polymeric Composite Electrolytes Containing Mesoporous Silicates

2007 ◽  
Vol 119 ◽  
pp. 51-54
Author(s):  
Seok Kim ◽  
Sung Goo Lee ◽  
Soo Jin Park
Keyword(s):  
Ionic Conductivity ◽  
Polymeric Composite ◽  
Mesoporous Structure ◽  
Composite Electrolytes ◽  
Mesoporous Silicates ◽  
Transfer Channel ◽  
Poly Ethylene Oxide ◽  
Ion Conducting ◽  
Poly Ethylene ◽  
Battery Application

Polymeric composite electrolytes (PCE) based on poly(ethylene oxide) (PEO) and mesoporous silicates as a filler material were fabricated, and investigated for understanding the effects of filler addition into the polymer matrix on the ionic conductivity. For a lithium battery application, it is necessary to increase ion conductivity of PCE by modification of microstructure. The ionic conductivity was enhanced with increasing MCM-41 contents due to the decreased crystallinity of PEO. Furthermore, the regular mesoporous structure could be functioned as an ion transfer channel for high ion mobility.

Poly(ethylene oxide)–silica hybrid materials for lithium battery application

1999 ◽  
Vol 39 (4) ◽  
pp. 206-210 ◽  
Author(s):  
Ce Wang ◽  
Yen Wei ◽  
George R Ferment ◽  
Wei Li ◽  
Tiejin Li
Keyword(s):  
Ethylene Oxide ◽  
Hybrid Materials ◽  
Lithium Battery ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Battery Application ◽  
Silica Hybrid
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