三室聚硫化物/化物基础的氧化流电池,可提高库伦比效率
Chao Deng1, Xiaoxin Li1, Mustafa Kemal Bayazit2,3
1Shanghai Key Laboratory of Hydrogen Science & Center of Hydrogen Science, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
ACS applied materials & interfaces
|September 17, 2025
概括
一个新的三室设计通过管理氧化离子交叉来显著提高聚硫化/流电池效率. 这一创新提高了Coulombic的效率,为更好的大型能源存储解决方案提供了更好的解决方案.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 聚硫化/化流电池 (PSIFBs) 在电网规模储能方面表现有前景.
- 在PSIFB中,低库伦比效率是由氧离子交叉和随后的I3-不成比例引起的.
- 有效管理离子运输对于提高PSIFB性能至关重要.
研究的目的:
- 为PSIFB开发一种新的反应器架构,以减轻氧化离子交叉.
- 提高科伦比亚PSIFB的效率和整体绩效.
- 为了研究中间室对离子传输和电池性能的影响.
主要方法:
- 一个三室反应堆的建造,其中一个中心的Na2SO4溶液室位于阴离子交换膜之间.
- 在高度电解质条件下 (4M NaI和3M Na2S2) 实验测试三室PSIFB.
- 有限元素分析 (FEA) 用于模拟和量化双室与三室配置中的氧化离子流量.
主要成果:
- 三室式设计使得氧化离子度在石中降低了97.3%.
- 与双室系统相比,FEA证实三室配置中的氧化离子流向波索利特显著较低.
- 库伦比效率从双室结构的78%提高到三室结构的91%.
- 在75%的充电状态下保持了20.05Wh L-1的竞争力能量密度.
结论:
- 三室反应堆有效地管理氧化离子交叉,这是PSIFB的一个关键限制.
- 这种建筑创新大大提高了库伦比克的效率,并保持了高能量密度.
- 这些发现为推进大规模可再生能源储存的PSIFB技术提供了一个可行的战略.
更多相关视频
08:35Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive
Published on: January 7, 2019
9.6K
09:22Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
Published on: July 25, 2025
681
相关概念视频
02:47Voltaic/Galvanic Cells
63.0K
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,...
63.0K
03:12Batteries and Fuel Cells
30.7K
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...
30.7K
01:27Controlled-Current Coulometry: Overview
652
Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
652
03:00Electrolysis
30.2K
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...
30.2K
01:17Controlled-Potential Coulometry: Electrolytic Methods
670
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
670