通过压力优化实现高效和稳定的质子交换膜水电解.
Jiawei Liu1,2, Han Liu1,2, Yang Yang1,2
1State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
ACS central science
|April 29, 2024
概括
质子交换膜水电解 (PEMWE) 中的机械应力显著影响性能. 一个新的Ti网格流通道 (TM-FC) 减少了压力不均质,提高了PEMWE可再生能源储能的效率和稳定性.
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
- 机械工程 机械工程
背景情况:
- 质子交换膜水电解 (PEMWE) 对于可再生能源储能至关重要,但在效率和长期稳定性方面面临挑战.
- 目前的PEMWE设计经常表现出不均的应力分布,这会对阳极催化剂层 (ACL) 的性能和耐用性产生负面影响.
研究的目的:
- 研究机械应力分布在PEMWE性能中的关键作用.
- 开发和评估一种新的流通道设计,以改善压力管理和增强PEMWE运行.
主要方法:
- 传统的蛇形流通道 (S-FC) 和具有梯度孔的提议的Ti网状流通道 (TM-FC) 的比较分析.
- 在不同条件下评估PEMWE电池中的应力分布,电压和降解率.
- 在高达100千瓦的电解器中对TM-FC设计进行跨度测试.
主要成果:
- 与S-FC相比,TM-FC设计显著降低了压力同质性的压力.
- 使用TM-FC的PEMWE显示了27mV的初始电压降低,电压降解率降低了8倍,为2.0A/cm2.
- TM-FC证明了可扩展性,在100千瓦电解器中,在三次大小扩展后,电压仅增加了20mV.
结论:
- 机械应力分布是PEMWE效率和稳定的关键因素,但经常被忽视.
- 拟议的Ti网格流通道有效地减轻了压力不均性,从而大大提高了PEMWE的性能和耐用性.
- TM-FC的设计显示出在可再生能源转换和储存的大规模PEMWE系统中具有强大的工业应用潜力.
相关概念视频
Potentiometry: Membrane Electrodes
567
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
567
Ion Exchange
591
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
591
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
ATP Driven Pumps I: An Overview
8.1K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
8.1K
Chemiosmosis
98.2K
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
98.2K


