在水性离子超级电容器中的接口存储机制,使用Keggin型多氧金属酸盐修饰的Ag-BTC
Yu Liang1, Hanyu Zhang2, Mengtian Huo1
1Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|December 23, 2024
概括
离子超级电容器 (AISC) 显示出对储能有前景. 改性聚氧甲酸盐 (POMs) 增强离子 (NH4+) 间隙,实现高级电池应用的高容量和稳定性.
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:
- 离子超级电容器 (AISC) 提供可持续和安全的能量存储.
- 在保持电容和稳定性方面存在挑战,原因是电极材料中的离子干/脱干问题.
研究的目的:
- 开发用于AISC的新型电极材料,克服稳定性限制.
- 研究使用聚氧甲酸盐 (POMs) 来增强离子储存机制.
主要方法:
- 合成POM修饰的[Ag-Hbtc][Ag-BTC]作为电极材料.
- 对容量和循环稳定性进行修改的电极的电化学表征.
- 制造和测试一个不对称的超级电容器装置.
主要成果:
- @Ag-BTC在1Ag-1时显示出619.4mAhg-1的特定电容.
- 电极材料在20,000次循环后保持了100%的电容,表明了出色的稳定性.
- 一个不对称的超级电容器实现了125.3Wh kg-1的能量密度.
结论:
- 经过POM修改的Ag-BTC电极通过接口机制有效地促进NH4+的伪电容储存.
- 这种方法显著增强了电荷储存,克服了传统间接材料的局限性.
- 基于POM的材料对先进的NH4+间隙/脱间隙储能设备具有相当大的潜力.
相关概念视频
Formation of Complex Ions
23.2K
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...
23.2K
Ion Exchange
546
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...
546


