在固体聚合物共聚合物中用聚甲基乙醇替换聚乙烯氧化物):形态和离子导电性
Ioannis Tzourtzouklis1, Tobias Gäb2, Marianna Spyridakou1
1Department of Physics, University of Ioannina, P.O. Box 1186, Ioannina 45110, Greece.
Macromolecules
|March 2, 2026
概括
新的区块共聚合物与聚甘甲基乙软区块显示出比固态电池的传统电解质更高的导电性. 这些材料提供了更好的性能和潜在的替代聚乙烯氧化物) 在固体聚合物电解质.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 电化学 电化学 电化学
背景情况:
- 聚乙烯氧化物 (PEO) 是固体聚合物电解质 (SPEs) 的常见成分,但存在结晶等局限性.
- 块共聚合物为工程电解质特性提供了一条途径,将不同的聚合物块结合起来,以获得量身定制的性能.
研究的目的:
- 开发和评估基于聚钢 (PS) 和聚甘甲基乙烯 (PGME) 或其共聚物质的新型块共聚合物电解质.
- 为了比较这些新电解质的离子导电能力和特性与已建立的基于PEO的系统.
主要方法:
- 阳离子环开放共聚合被用于合成PS-b-P- ((EO-co-GME) 和PS-b-PGME块共聚合物.
- 合成的聚合物被添加了二三甲硫) 胺 (LiTFSI).
- 在各种温度下进行了直流导电性测量,包括在聚乙烯块的玻璃过渡温度下.
主要成果:
- 合成的区块共聚合物表现出完全无形性和狭窄的分散性.
- 与LiTFSI合的PS-b-PGME和PS-b-P-(EO-co-GME) 与基于PEO的电解质相比,显示出优越的电流导电性.
- PS-b-PGME的导电性比PS-b-P-(EO-co-GME) 和其他单离子导体更高.
结论:
- 聚甘甲基乙烯 (PGME) 是PEO的有希望的替代品,作为块共聚合物SPEs中的软块.
- 基于PGME的电解质提供了低玻璃过渡温度,盐溶解,高介电电容率和非结晶性的有利组合.
- 这些发现表明了设计高级电池应用的高性能固体聚合物电解质的新途径.
更多相关视频
10:53Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
Published on: October 10, 2016
14.7K
11:32Characteristics of Precipitation-formed Polyethylene Glycol Microgels Are Controlled by Molecular Weight of Reactants
Published on: December 23, 2013
12.3K
相关概念视频
01:24Characteristics and Nomenclature of Copolymers
3.5K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
3.5K
01:17Ion Exchange
1.4K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.4K
01:13Olefin Metathesis Polymerization: Overview
2.7K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.7K
01:14Polymer Classification: Architecture
4.0K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
4.0K