针对高安全性,速率能力和能量密度金属电池的定向结构
Kaiming Wang1,2,3, Aaron Jue Kang Tieu1, Haowen Wu1
1Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore.
概括
金属电池 (LMB) 中的定向结构克服了能源密度,速率能力和安全方面的关键挑战. 本综述探讨了它们的设计,准备和机制,以提高下一代能源存储的性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属电池 (LMB) 提供高能量密度,但在优化能量密度,速率能力和安全方面面临挑战.
- 现有的局限性包括低活性物质利用率,树状石的形成,以及固态电解质的低离子导电性.
研究的目的:
- 在LMB中引入面向结构的概念,作为解决绩效障碍的战略.
- 为量化方向提供标准,并阐明其对材料和设备性能的影响.
- 将面向结构分类并总结用于增强LMB的准备技术.
主要方法:
- 在LMBs中面向结构的整体审查.
- 分析增强能量密度,速率能力和安全性的机制.
- 探索制备技术和潜在的应用.
主要成果:
- 定向结构在改善活性物质利用,抑制树生长和增强离子导电性方面表现有前途.
- 阐明了导向对材料和设备属性的系统影响.
- 针对目标的LMB设计,建议对定向结构进行分类.
结论:
- 面向结构是克服LMB关键局限性的可行策略,为商业化铺平了道路.
- 对制备技术和应用的进一步研究对于推进高性能和安全的LMB至关重要.
相关概念视频
Batteries 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
Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K
Ionic 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
Ionic Crystal Structures
14.3K
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...
14.3K
Complexation Equilibria: Factors Influencing Stability of Complexes
358
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
358
Trends in Lattice Energy: Ion Size and Charge
23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K


