相关实验视频
Updated: Jun 5, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
工作功能激活的质子间歇化学有助于超稳定的水性离子电池
Kaisheng Sun1, Yumiao Tian2, Meihua Zhu3
1Synergetic Extreme Condition High-Pressure Science Center, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, 130012 Changchun, PR China; College of Chemistry, Jilin University, Changchun 130012, China.
Journal of colloid and interface science
|December 15, 2024
概括
研究人员使用金属有机框架为水性离子电池开发了新的氧化阴极. 这些阴极增强了质子转移和能量储存,显示出用于先进电池开发的卓越循环稳定性.
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:
- 水性离子电池 (AZIB) 由于其高能量密度和电解质适用性而具有前景.
- 传统的氧化阴极因强烈的静电相互作用而面临离子间隙动力学的挑战.
研究的目的:
- 为AZIBs设计具有改进的质子 (H+) 转移的氧化 (MnOx) 阴极.
- 为了研究工作功能和CO结合在调节质子互化学中的作用.
- 为AZIBs开发高性能阴极材料.
主要方法:
- 从双金属金属有机框架 (MOF) 制造M-MnO异质连接 (M=Cu/Co/Ni/Zn).
- 利用密度功能理论 (DFT) 将工作功能与质子吸附能量相关联.
- 电化学测试用于评估阴极性能,包括容量,速率能力和循环稳定性.
主要成果:
- M-MnO异质连接证明了对调节质子吸收能量的可控工作功能.
- 来自MOF的CO键作为高效的质子转移通道.
- -MnO阴极实现了卓越的性能:431.6 mAh g−1在0.2 A g−1和150.7 mAh g−1在5.0 A g−1,在12,000个循环后保持98.24%的容量.
结论:
- 工作功能的调制是一种可行的策略,可以增强AZIB阴极中的质子介质化学.
- 开发的MOF衍生异质连接为高性能AZIB阴极材料提供了一个有希望的途径.
- 这项研究为储能应用提供了对工作功能和质子化学之间的关系的基本见解.
相关概念视频
03:12Batteries and Fuel Cells
27.0K
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...
27.0K
02:41Concentration Cells
22.3K
A concentration cell is a type of a voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
Consider the following voltaic cell:
Consider the following voltaic cell:
22.3K
03:02Standard Electrode Potentials
43.4K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
43.4K
03:45Formation 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
02:47Voltaic/Galvanic Cells
56.8K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
56.8K
03:00Electrolysis
26.0K
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...
26.0K