在固体聚合物电解质方面,Phonon工程致力于为固态电池提供高安全性.
Xuemin Shi1, Zhuangzhuang Jia2, Donghai Wang1
1Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
Advanced materials (Deerfield Beach, Fla.)
|June 14, 2024
概括
研究人员通过减少声子散射,为离子电池 (LIB) 开发了一种新的固体聚合物电解质 (SPE). 这项创新提高了导热性,并有效地抑制了热失控,提高了电池的安全性.
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
- 聚合物科学 聚合物科学
背景情况:
- 可充电离子电池 (LIB) 广泛使用,但面临安全和循环寿命限制.
- 目前的LIBs需要改进热管理,以防止热失控 (TR).
研究的目的:
- 制造一种超薄的固体聚合物电解质 (SPE),具有增强的导热性,以提高LIB安全性.
- 研究声子散射减小对LIBs的热性能和安全性的影响.
主要方法:
- 在聚乙烯分离器上使用离子液 (1-乙基-3-甲基利米达二胺,EMIM:DCA),聚氨 (PU) 和盐的复合物制造超薄的SPE.
- 通过引入EMIM:DCA来打破PU聚合物链吸引力的减少声子散射的分析.
- 在LIBs中测量热导率增强和评估热失控抑制的测量.
主要成果:
- 复合SPE显示热导率增加了六倍,这是由于减少了声子散射.
- 修改后的分离器矩阵提供了改进的Li+流动性和正常的热扩散通道.
- 在制造的LIB中观察到有效抑制热逃跑 (TR).
结论:
- 通过加入离子液体来减少声子散射,可以显著提高SPEs的导热性.
- 波工程为设计高安全性离子电池提供了一种新的策略.
- 开发的SPE表明了更安全,更可靠的LIB应用程序的潜力.
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
10:58Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018
10.2K
相关概念视频
Molecular and Ionic Solids
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Batteries and Fuel Cells
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Capacitor With A Dielectric
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
DC Battery
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
