一个完全溶解的Fe/Mn基性逆氧流电池系统
Xiaochen Shen1, Christian Kellamis1, Vincent Tam1
1Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States.
ACS applied materials & interfaces
|April 4, 2024
概括
本研究探讨了一种铁氧化还原流电池 (RFB) 系统,以节省成本有效地储存能量. 性Fe/Mn RFB表现出高库伦比克效率,但需要酸处理才能保持电压效率.
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:
- 反氧流电池 (RFB) 对于大规模储能和可再生能源整合至关重要.
- 开发具有成本效益和高性能的RFB系统仍然是一个重大挑战.
- 铁和是丰富的,低成本的元素,适合可持续的电池化学.
研究的目的:
- 为了研究一种新的性铁 (Fe/Mn) 氧化还原流电池系统.
- 为了评估[TEA]Fe-O-Fe[TEA]3-/4-和MnO4氧化还原对的性能.
- 评估该系统在低成本,高能储能应用中的可行性.
主要方法:
- 恒流循环测试是在±41 mA cm-2进行的.
- 电池在20%至80%的充电状态 (SOC) 之间循环运行800小时 (400个周期).
- 定期使用酸性处理来解决性能退化问题.
主要成果:
- 该Fe/Mn RFB系统实现了接近100%的明显库伦比效率 (CE).
- 在测试期间,电压效率 (VE) 从大约75.3%降至61.4%.
- 在分离器上沉积的二氧化 (MnO2) 被确定为增加内部电阻的原因.
结论:
- 性Fe/Mn RFB系统显示出低成本,可持续的储能系统的前景.
- 保持电压效率需要对MnO沉积采取缓解策略.
- 定期进行酸性处理可以通过去除隔离器沉积物来有效地恢复电压效率.
相关概念视频
Batteries and Fuel Cells
27.3K
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...
27.3K
Voltaic/Galvanic Cells
57.2K
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,...
57.2K
Ladder Diagrams: Redox Equilibria
457
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
457
Balancing Redox Equations
52.1K
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
52.1K
Electrolysis
26.3K
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...
26.3K
Electrodeposition
633
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
633


