复合固体电解质的离子运输途径多样化,用于高性能固态金属电池
Wei Han1, Guang Li1, Jingjing Zhang1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
ACS applied materials & interfaces
|May 14, 2024
概括
研究人员通过增强复合固体电解质 (CSEs) 来改进固态金属电池. 他们使用氨基连接器将陶纳米纤维移植到聚合物矩阵中,从而提高离子导电性和电池性能.
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
- 纳米技术 纳米技术
背景情况:
- 固态金属电池需要复合固体电解质 (CSEs) 来提高安全性和能量密度.
- 由于有限的自由离子度,当前的CSE遭受了低离子导电性.
- 在CSEs中改善界面相互作用对于有效的离子传输至关重要.
研究的目的:
- 为CSEs开发一个接口设计策略,以提高离子导电性.
- 在CSEs中改善陶填充剂和聚合物矩阵之间的兼容性.
- 为了研究链接结构对盐解离和离子运输的作用.
主要方法:
- 将Li$_{7}$La$_{3}$Zr$_{2}$O$_{12}$ (LLZO) 陶纳米纤维移植到PVDF-HFP聚合物上,使用氨基连接器.
- 利用结和易斯酸相互作用来增强接口特性.
- 系统研究链接结构对盐通过硬质效应解离的影响.
主要成果:
- 在聚合物基质中实现了50%重量LLZO纳米纤维的均结合.
- 通过协同运输道,提高了离子导电率至5.8 × 10$^{-4}$ S cm$^{-1}$.
- 在对称细胞中证明了改善沉积行为和调节.
结论:
- 拟议的接口设计策略有效地增强了固态金属电池的CSE.
- 开发的CSE与LiFePO$_{4}$和LiNi$_{0.8}$Co$_{0.1}$Mn$_{0.1}$O$_{2}$阴极具有很好的兼容性.
- 该研究提供了对先进电池电解质接口工程的见解.
更多相关视频
相关概念视频
03:12Batteries and Fuel Cells
27.3K
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...
27.3K
03:45Formation of Complex Ions
23.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.6K
02:48Ionic Bonding and Electron Transfer
41.4K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
41.4K
02:54Molecular and Ionic Solids
17.1K
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...
17.1K
03:00Electrolysis
26.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.3K
00:42Ionic Bonds
118.3K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
118.3K