桥接多尺度接口,用于开发具有离子导电性的高压硫酸铁含基电池正电极
Jiyu Zhang1, Yongliang Yan1, Xin Wang1
1College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, China.
Nature communications
|June 22, 2023
概括
硫酸铁材料的接口工程提高了用于电网存储的离子电池性能. 这种方法提高了动力学和稳定性,为实际的离子电池铺平了道路.
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:
- 非水性离子电池 (SiBs) 对电网存储充满希望.
- 挑战包括缓慢的动力学和高电压的正电极的界面不稳定性.
研究的目的:
- 通过Na2.26Fe1.87(SO4)3.3的多尺度接口工程来提高离子存储性能.
- 解决SiBs中聚离子型铁基硫酸盐的局限性.
主要方法:
- 多尺度接口工程涉及大量的异构结构和暴露的晶体平面调整.
- 物理化学表征和理论计算.
- 在实验室规模的单层囊细胞中用FeS/碳负电极进行测试.
主要成果:
- 一个Na6Fe(SO4) 4异构阶段通过优化Na-离子迁移通道促进了离子动力学.
- Na2.26Fe1.87(SO4)3 的 (11-2) 平面促进了电解质吸附,形成了一个稳定的,富含无机物的间相.
- 工程电极在2.35V时实现了83.9mAhg-1的初始放电容量,在40个循环后保持了97%的容量.
结论:
- 多尺度接口工程对于提高Na2.26Fe1.87(SO4) 3正电极的性能是有效的.
- 开发的材料证明了在电网存储应用中实用的SiB的潜力.
更多相关视频
07:20Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
2.6K
07:55Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
12.8K
相关概念视频
Formation of Complex Ions
23.8K
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...
23.8K
Batteries and Fuel Cells
27.7K
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...
27.7K
Ionic 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
Ion Exchange
625
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
625
