用于高性能水性-有机电池的thioether连接纳夫托金阴极的空间结构设计
Qi-Qi Sun1,2, Jia-Yi Du2,3, Tao Sun4
1National & Local United Engineering Laboratory for Power Battery, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, China.
Advanced materials (Deerfield Beach, Fla.)
|February 13, 2024
概括
本研究引入了用于水性离子电池的新型有机电极材料,证明空间结构对性能有重大影响. 设计的纳夫托基异构体提供了高容量和长期稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 有机电极材料 (OEM) 由于其可调性,对水性离子电池 (AZIB) 是有前途的.
- 当前的研究往往忽视了空间结构对AZIBsOEM性能的影响.
研究的目的:
- 为AZIB阴极设计和研究具有多种空间结构的乙结合纳夫托基衍生异构体.
- 阐明分子空间配置对电化学性质和性能的影响.
主要方法:
- 有控制空间结构的纳夫托基诺衍生异构体的合成.
- 在AZIB中将异构体作为阴极材料的电化学表征.
- 分析结构-属性关系,重点关注氧化还原行为和动力学.
主要成果:
- 不完全结合的异构体确保独立的氧化还原反应,最大限度地利用活性位点和可逆性.
- 定位异构化影响性活性和氧化还原动力学,突出显示了空间布局的重要性.
- 这种 2,2'-(1,4-phenylenedithio) bis(1,4-naphthoquinone) (p-PNQ) 异构体实现了高特异容量 (279 mAh g−1),优异的速率能力 (167 mAh g−1 在 100 A g−1),以及长周期寿命 (>2800 h).
结论:
- 空间结构是一个关键的,经常被忽视的,在为AZIB设计高性能OEM的因素.
- 调整纳夫托基衍生物的空间配置可以显著提高电化学性能.
- 开发的p-PNQ证明了作为先进的AZIB的优质阴极材料的潜力.
相关概念视频
02:42Ionic 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
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.6K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.6K
02:37Metallic 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