在birnessite类型的MnO2中进行阴离子/离子协同调节,以在广泛的温度范围内促进双离子储存
Yunhao Hu1, Depeng Zhang2, Zhengkun Liu1
1College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China.
Journal of colloid and interface science
|November 15, 2025
概括
研究人员开发了一种用于水性离子电池的新型Ca/N联合化二氧化 (MnO) 阴极. 这种增强显著提高了电池性能,稳定性和导电性,为先进的储能解决方案铺平了道路.
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:
- 水性离子电池 (ZIBs) 提供了高的理论容量,低成本和增强的安全性.
- 在ZIB中的二氧化 (MnO2) 阴极遭受电子导电不良,溶解和有限的稳定性.
- 开发稳定高效的MnO2阴极对于推进ZIB技术至关重要.
研究的目的:
- 引入一个协同的阴离子/离子 (Ca/N) 协同兴奋剂策略,用于伯尼石类型MnO2.
- 为了提高MnO2阴极的电化学性能,结构稳定性和离子/电子传输.
- 开发高性能灵活的ZIB,在各种温度范围内可靠地储存能量.
主要方法:
- 在birnessite型MnO2的协同Ca/N配合中,产生CACO-δ-MnO2.
- 理论分析 (DFT) 来研究电子结构,带隙,吸附能量和离子扩散障碍.
- 现场和现场表征,电静电间歇定位技术 (GITT) 和电化学阻抗光谱 (EIS).
- 在各种条件下制造和测试柔性Zn-MnO电池.
主要成果:
- /联合剂降低了带隙和离子扩散能量屏障,改善了导电性和离子移动性.
- CACO-δ-MnO2表现出优越的结构稳定性和双重的Zn2+/H+插入机制.
- 阴极表现出快速的动力学,低电荷转移阻力,以及在2000次循环后在4Ag-1下具有很好的长期循环稳定性 (213.5mAhg-1).
- 灵活的Zn-MnO电池显示出高灵活性,可靠性在-20°C至25°C之间,在 -20°C下1000次循环后保持89.2%的容量.
结论:
- 在Ca/N协同作用的联合兴奋剂策略有效地提高了对ZIBs的δ-MnO2阴极的性能.
- 这种方法显著提高了导电性,稳定性和速率能力,解决了基于MnO的电池的关键局限性.
- 开发的灵活的ZIB显示出对实际应用的希望,这些应用需要强大且耐温度的能量存储.
更多相关视频
10:42Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
11.1K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.6K
相关概念视频
Structural Isomerism
21.4K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
21.4K
Valence Bond Theory
11.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.1K
Formation of Complex Ions
25.6K
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...
25.6K
Ionic Strength: Effects on Chemical Equilibria
2.5K
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...
2.5K
Ionic Crystal Structures
16.8K
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...
16.8K
Metal-Ligand Bonds
23.9K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
23.9K
