通过使用固体还原剂来解决氧流电池中的法拉戴失衡问题
Gimena Marin-Tajadura1,2, Ismael Suárez-Esteban1,2, Ruben Rubio-Presa1,2
1International Research Center in Critical Raw Materials-ICCRAM, University of Burgos, Pza. Misael Bañuelos s/n, E-09001 Burgos, Spain.
概括
这项研究介绍了LiFePO4 (LFP) 作为固体还原剂,用于逆转氧化还原流电池 (RFB) 的容量衰减. 这种新的方法有效地减轻了法拉代失衡,提高了电池的性能和寿命.
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) 对于大规模储能至关重要.
- 在RFB中,容量衰减通常是由电化学副作用引起的,导致电荷不平衡.
- 现有的方法很难有效地逆转这些有害影响.
研究的目的:
- 开发一种新的策略,以减轻和扭转RFB中的法拉迪失衡.
- 将固体还原剂LiFePO4 (LFP) 引入阴解质中.
- 提高RFB的性能和运行寿命.
主要方法:
- 在加索利特中使用LiFePO4 (LFP) 颗粒实施了异质反应.
- 在中性pH电解质中利用了K4Fe(CN) 6作为阴解质和viologen (BSPV) 作为解质.
- 使用XRD分析研究了氧化还原过程和容量恢复.
主要成果:
- LiFePO4 (LFP) 颗粒通过化学降低累积的K3Fe (CN) 6回到K4Fe (CN) 6.
- 观察到一个自发的氧化还原过程与LFP氧化到FePO4.
- 在带有容量限制性阴解质的流量电池中证明了显著的容量恢复.
结论:
- 引入固体还原剂 (LFP) 是一个有前途的策略,以解决RFB的法拉代失衡.
- 这种方法有效地逆转了由K3Fe(CN) 6积累引起的容量损失.
- 这些发现表明了提高RFB系统的寿命和可靠性的途径.
相关概念视频
Voltaic/Galvanic Cells
67.4K
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,...
67.4K
Redox Equilibria: Overview
1.7K
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
1.7K
Redox Reactions
59.2K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
59.2K
Redox Reactions
1.3K
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
1.3K
Voltammetry: Factors Affecting Measurements
652
A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...
652
Balancing Redox Equations
63.7K
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...
63.7K


