洞察NaClO4-doped聚烯酸固体聚合物电解质中的离子动力学,用于固态电池.
Supriya K Shetty1, Ismayil1, Pradeep Nayak1
1Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India. ismayil.mit@manipal.edu.
Physical chemistry chemical physics : PCCP
|September 19, 2024
概括
这项研究探讨了用于离子电池的聚烯酸 (PCL) 电解质,实现中等离子导电性. PCL-NaClO4系统显示出良好的稳定性和电化学应用的潜力.
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:
- 低玻璃过渡温度 (Tg) 的聚合物在环境温度下面临离子导电性的限制,原因是链动力学受到限制.
- 聚合物中的交叉连接可以使链条变硬并创建有序结构,影响离子运输.
- 开发固体聚合物电解质 (SPEs) 对于更安全,更高效的储能设备至关重要.
研究的目的:
- 研究基于聚烯 (PCL) 的固体聚合物电解质的离子导电性和电化学特性.
- 为了评估PCL-PCL-NaClO4电解质在不同阴极材料的离子电池中的性能.
- 了解聚合物结构,离子运输机制和电化学性能之间的关系.
主要方法:
- 聚卡普罗拉克 (PCL) 和PCL-NaClO4复合电解质的合成和表征.
- 电化学阻抗光谱 (EIS) 用于测量离子导电.
- 循环电压测量 (CV) 和静电充放电 (GCD) 测试用于评估电池性能.
- 对离子运输机制的分析,包括量子力学道化.
主要成果:
- 获得了1.02 × 10^-5 S cm^-1的离子导电性,归因于量子力学道化离子运输模式.
- 在25°C的PCL中,获得0.31的离子转移数,用于PCL中的30%重量NaClO4.
- 电解质表现出3.6V的电化学稳定性窗口,并表现出良好的热和机械性能.
- 当PCL-NaClO4电解质与MnO2,V2O5和I2阴极材料配对时,显示出不同的放电特性.
结论:
- PCL-NaClO4系统是一个有前途的固体聚合物电解质,具有可接受的离子导电性和电化学稳定性,适用于离子电池.
- 高晶度和电解质中有限的自由离子可用性有助于降低离子导电率.
- 需要进一步优化电解质组成和电极材料,以提高电池的整体性能.
更多相关视频
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
4.4K
09:22Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
Published on: August 28, 2015
19.1K
相关概念视频
Molecular and Ionic Solids
17.0K
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...
17.0K
Ionic Crystal Structures
14.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.2K
Anionic 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
Aqueous Solutions and Heats of Hydration
14.6K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.6K
