高稳定的光辅助离子电池通过受调光诱导的质子转移
相关实验视频
Updated: Jul 4, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
Wenwen Zha1, Qiushi Ruan1, Long Ma1
1Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China.
Angewandte Chemie (International ed. in English)
|February 9, 2024
概括
摄影辅助电池使用光来增加容量,但缺乏稳定性. 这项研究表明,光诱导的质子转移会导致不稳定性,但阳极合金策略可以提高V2O5离子电池的稳定性和容量.
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:
- 照片辅助离子电池通过光线提供增强的容量,但遭受循环不稳定.
- 在照明下复杂的电荷/离子转移是这些系统的一个关键挑战.
- 基于V2O5的离子电池被广泛使用,但其光稳定性不佳.
研究的目的:
- 确定基于V2O5的离子电池中光诱导不稳定的潜在机制.
- 开发一种提高这些电池光稳定性和循环性能的策略.
- 通过一种新的方法来证明增强能力和寿命.
主要方法:
- 使用瞬态光谱学研究了光诱导的质子转移 (光诱导PT).
- 分析了光诱导PT对V2O5光电极在光放电过程中的影响.
- 实施了一种阳极合金策略,以管理合的质子.
主要成果:
- 照相诱导的PT被确定为发生在光刺激100 psi以内的关键过程.
- 这一过程导致了快速的质子提取,形成了缺乏质子的表面,导致阴极溶解和阳极腐蚀.
- 阳极合金策略成功实现了可逆质子利用,显著提高了光稳定性.
结论:
- 光诱导的质子转移是V2O5基光辅助离子电池中不稳定的主要原因.
- 通过阳极合金对质子的可逆管理可以克服不稳定性问题.
- 这项工作介绍了一种基于V2O5的离子电池,在照明下容量增强了54%左右,在4000个循环后保持了90%左右,显著延长了光稳定性记录.
相关概念视频
01:34The Z-Scheme of Electron Transport in Photosynthesis
10.1K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
10.1K
03:12Batteries and Fuel Cells
27.4K
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...
27.4K
03:02Standard Electrode Potentials
43.8K
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...
43.8K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K