基于化PVA/纤维素酸盐的多电解质膜用于直接的甲醇燃料电池应用:合成,仪器表征和性能测试
Mahmoud Khalaf1, Ahmed M Saeed2, Ahmed I Ali3
1Chemistry Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.
Scientific reports
|August 10, 2023
概括
这项研究开发了一种具有成本效益的化聚乙烯酒精移植纤维素酸盐膜,用于直接甲醇燃料电池 (DMFC). 与Nafion 117.7相比,新的膜显示出更好的质子导电性和更低的甲醇透性.
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
- 聚合物化学 聚合物化学
背景情况:
- 开发高效的聚合物电解质膜 (PEM) 对直接甲醇燃料电池 (DMFC) 至关重要.
- 关键的挑战包括同时实现高质子导电性和低甲醇透性.
- 材料的成本效益也是商业可行性的重要因素.
研究的目的:
- 综合和描述一个新的,具有成本效益的PEM.
- 为DMFC应用评估酸化聚乙烯酒精移植纤维素酸盐 (Ph-PVA/CA) 膜的性能.
- 为了优化膜组成,提高质子导电性和减少甲醇交叉.
主要方法:
- 使用溶液造技术制备了Ph-PVA/CA膜.
- 用FT-IR分析和SEM进行了膜性质的表征.
- 测量了包括水/甲醇吸收,离子交换能力 (IEC),质子导电性和甲醇透性在内的关键性能指标.
主要成果:
- Ph-PVA/CA 膜显示了改善的质子导电性 (0.05 S/cm 在 70 °C) 和 IEC (2.1 meq/g).
- 甲醇的透性被发现是较低的 (1.08 × 10−10 cm2/s) 比Nafion 117.
- 通过特定度的酸化剂和接种比率,可以达到最佳的膜性能.
结论:
- 开发的Ph-PVA/CA膜为传统PEM提供了一个有前途的低成本替代品.
- 这些膜表现出高质子导电性和低甲醇透性的有利平衡.
- 这些材料是适合用于直接甲醇燃料电池的候选材料.
更多相关视频
07:45Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
10.0K
08:59Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
Published on: November 30, 2022
4.5K
相关概念视频
01:15Potentiometry: Membrane Electrodes
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 the...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...