离子电池的凝聚合物电解质由光交联聚合物网络启用
Kyeongsik Kim1, Wookil Chae1, Jaehyeon Kim1
1Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea.
Gels (Basel, Switzerland)
|December 22, 2023
概括
这项研究引入了一种用于离子电池的新型凝聚合物电解质 (GPE),利用交联聚乙烯甘二烯酸盐 (PEGDA) 和二甲基六烯酸盐 (DPHA). 与液体电解质相比,新的GPE提供了更好的热稳定性和更高的循环性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 离子电池中常规的液态电解质 (LE) 由于易燃性而带来安全风险.
- 开发稳定高效的固态电解质或凝电解质对于下一代电池技术至关重要.
研究的目的:
- 为离子电池合成和表征一种新的凝聚合物电解质 (GPE).
- 通过调整聚乙烯糖醇) 二烯酸盐 (PEGDA) 和二甲醇六烯酸盐 (DPHA) 交叉连接剂的比率来优化GPE.
- 评估开发的GPE的电化学性能和热稳定性.
主要方法:
- 利用激素光发射器和紫外线 (UV) 光聚合,从PEGDA和DPHA单体中形成一个交联的聚合物矩阵.
- 研究了PEGDA和DPHA的不同比例,以创建一个最佳的GPE网络.
- 测量了离子导电性,转移数和电化学循环性能.
主要成果:
- 实现了具有高离子导电性 (1.40 mS/cm) 和高转移数 (0.65) 的GPE.
- 与传统的液体电解质相比,证明了增强的热稳定性.
- 在200个循环后表现出优异的循环性能,容量保留率为85.2%,优于液体电解质 (79.3%).
结论:
- 开发的基于PEGDA/DPHA的GPE为更安全,更高性能的离子电池提供了液态电解质的有希望的替代品.
- 交联的聚合物网络有效地固定液体电解质,提高安全性和稳定性.
- 战略性单体比率优化是实现GPEs优异的离子导电性和循环寿命的关键.
更多相关视频
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.0K
08:59Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
Published on: November 30, 2022
4.5K
相关概念视频
01:20Anionic Chain-Growth Polymerization: Overview
2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
01:04Anionic Chain-Growth Polymerization: Mechanism
2.0K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.0K
01:17Ion Exchange
593
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...
593
00:57Cationic Chain-Growth Polymerization: Mechanism
2.3K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.3K