实用离子电池的内在稳定的分层氧化物阴极:固溶液反应,近零应变和神奇的水稳定性
Hong-Wei Li1,2,3, Jia-Yang Li2,3,4, Hang-Hang Dong5
1School of Materials Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 5, 2023
概括
研究人员开发了一种水稳定的,基于的阴极材料,用于离子电池 (SIB). 这一突破使得以水为基础的电极制造成为可能,降低了下一代能源存储的成本和环境影响.
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:
- 由于对水的敏感性,N-甲基-2-pyrrolidone (NMP) 是用于层氧化物阴极制造的常见非水性溶剂.
- 由于NMP的高成本和毒性,需要替代性,水稳定的阴极材料来生产经济更安全的离子电池 (SIB).
研究的目的:
- 为SIBs合成和评估一种新的,水稳定的基阴极材料.
- 为了证明使用这种新材料在电极制造中使用水溶性粘合剂的可行性.
- 评估SIB中水稳定阴极的电化学性能和循环稳定性.
主要方法:
- 一种类似纳米板的基阴极材料的合成.
- 在离子电池的电化学性能测试.
- 通过处理后分析评估水的稳定性.
- 在现场进行X射线衍射 (XRD) 来研究反应机制.
- 使用水溶性粘合剂制造电极.
主要成果:
- 合成的基材料表现出卓越的电化学性能和显著的水稳定性.
- 材料在500个循环后保持79.6%的容量,即使在水处理后也是如此.
- 在现场XRD证实了近零应变的固体溶液反应机制.
- 使用水溶性粘合剂制造的电极表现出良好的长周期稳定性 (在500个循环后保持67.9%的容量).
结论:
- 一种适用于SIB的新型,水稳定的Mn基阴极材料已经成功开发出来.
- 该材料的水稳定性允许在电极制造中使用环保,水溶性粘合剂.
- 这项研究为设计用于水处理SIB的经济高效和实用的阴极材料提供了有希望的途径.
相关概念视频
03:00Electrolysis
26.5K
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...
26.5K
02:42Ionic Crystal Structures
14.4K
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...
14.4K
02:48Ionic Bonding and Electron Transfer
41.6K
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.
41.6K
01:19Ionic Strength: Effects on Chemical Equilibria
1.5K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
In this solution, the primary...
1.5K