scholarly journals Real-Time Monitoring of HT-PEMFC

Membranes ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 94
Author(s):  
Chi-Yuan Lee ◽  
Fang-Bor Weng ◽  
Chin-Yuan Yang ◽  
Chun-Wei Chiu ◽  
Shubham-Manoj Nawale
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Flow Rate ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Micro Electro Mechanical Systems ◽  
Fuel Distribution ◽  
Mems Technology ◽  
Exchange Membrane

During the electrochemical reaction of a high temperature proton exchange membrane fuel cell (HT-PEMFC), (in this paper HT-PEMFC means operating in the range of 120 to 200 °C) the inhomogeneity of temperature, flow rate, and pressure in the interior is likely to cause the reduction of ion conductivity or thermal stability weight loss of proton exchange membrane materials, and it is additionally likely to cause uneven fuel distribution, thereby affecting the working performance and service life of the HT-PEMFC. This study used micro-electro-mechanical systems (MEMS) technology to develop a flexible three-in-one microsensor which is resistant to high temperature electrochemical environments; we selected appropriate materials and process parameters to protect the microsensor from failure or damage under long-term tests. The proposed method can monitor the local temperature, flow rate, and pressure distribution in HT-PEMFC in real time.

scholarly journals Persistent Effect Test and Internal Microscopic Monitoring for PEM Water Electrolyzer

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 494
Author(s):  
Chi-Yuan Lee ◽  
Chia-Hung Chen ◽  
Guo-Bin Jung ◽  
Yu-Xiang Zheng ◽  
Yi-Cheng Liu
Keyword(s):  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Low Cost ◽  
Proton Exchange ◽  
Hydrogen Energy ◽  
Micro Electro Mechanical Systems ◽  
Persistent Effect ◽  
Mems Technology ◽  
Exchange Membrane ◽  
Effect Test

As the environmental considerations rise all over the world and under the drive of renewable energy policy, the society of hydrogen energy will come out gradually in the future. The proton exchange membrane water electrolyzer (PEMWE) is a very good hydrogen generator, characterized by low cost, high efficiency and zero emission of greenhouse gases. In this study, the micro temperature, humidity, flow, pressure, voltage, and current sensors were successfully integrated on a 50 μm thick Polyimide (PI) substrate by using micro-electro-mechanical systems (MEMS) technology. After the optimal design and process optimization of the flexible 6-in-1 microsensor, it was embedded in the PEMWE for a 500-h persistent effect test and internal real-time microscopic monitoring.

Electrochemical Characterization of a High-Temperature Proton Exchange Membrane Fuel Cell Using Doped-Poly Benzimidazole as Solid Polymer Electrolyte

2015 ◽  
Vol 12 (3) ◽  
Author(s):  
S. A. Grigoriev ◽  
N. V. Kuleshov ◽  
A. S. Grigoriev ◽  
P. Millet
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Flow Rate ◽  
Solid Polymer Electrolyte ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Solid Polymer ◽  
Air Flow Rate ◽  
Exchange Membrane

A high-temperature proton exchange membrane (PEM) fuel cell using H3PO4-doped poly benzimidazole (PBI) as solid polymer electrolyte has been developed and tested. The influences of operating temperature (between 130 and 170 °C), operating pressure (between 0 and 2 bar), and air flow rate on the performances of the fuel cell have been measured. A maximum power density of ca. 200 mW/cm2 has been measured. The existence of an optimum air flow rate (expressed in oxygen stoichiometric ratio) has been put into evidence. It allows an increase of the fuel cell voltage from 250 mV up to ca. 400 mV at 0.4 A/cm2.

scholarly journals Flexible 5-in-1 Microsensor Embedded in the Proton Battery for Real-Time Microscopic Diagnosis

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 276
Author(s):  
Chi-Yuan Lee ◽  
Chia-Hung Chen ◽  
John-Shong Cheong ◽  
Yun-Hsiu Chien ◽  
Yi-Chuan Lin
Keyword(s):  
Proton Exchange Membrane ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Battery Life ◽  
Physical Parameters ◽  
Micro Electro Mechanical Systems ◽  
Proton Battery ◽  
Mems Technology ◽  
Microscopic Diagnosis ◽  
Exchange Membrane

The proton battery possesses water electrolysis, proton storage and discharging functions simultaneously, and it can be manufactured without expensive metals. Use the principle of proton exchange membrane water electrolysis for charging, store it in the activated carbon on the hydrogen side and use the principle of proton exchange membrane fuel cell for discharge when needed. According to the latest literature, it is difficult to obtain the exact important physical parameters inside the proton battery (e.g., voltage, current, temperature, humidity and flow), and the important physical parameters are correlated with each other, which have critical influence on the performance, lifetime and health status of the proton battery. At present, the condition of the proton battery is judged indirectly only by external measurement, the actual situation inside the proton battery cannot be obtained accurately and instantly. Therefore, this study uses micro-electro-mechanical systems (MEMS) technology to develop a flexible 5-in-1 microsensor, which is embedded in the proton battery to obtain five important physical parameters instantly, so that the condition inside the proton battery can be mastered more precisely, so as to prolong the battery life and enhance the proton battery performance.

An Experimental Study on Micro Proton Exchange Membrane Fuel Cell

2012 ◽  
Vol 9 (3) ◽  
Author(s):  
Chiun-Hsun Chen ◽  
Tang-Yuan Chen ◽  
Chih-Wei Cheng ◽  
Rong-Guie Peng
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Current Collector ◽  
Proton Exchange ◽  
Operating Voltage ◽  
Durability Test ◽  
Micro Electro Mechanical Systems ◽  
Mems Technology ◽  
Current Densities ◽  
Exchange Membrane

This study fabricates a micro proton exchange membrane fuel cell (PEMFC) using micro electro mechanical systems (MEMS) technology. The active area of the membrane is 2 cm × 2 cm (4 cm2). The study is divided into two categories: [(1) the parametric experimental investigation, and (2) the durability test. This work is an attempt to find out how several parameters, including reheat temperature, the material of the current collector plates, the open ratio, and different cathode gases affect micro PEFMC performance. According to the experimental results obtained, both the conducting area and the material of the current collector plates exert great influences on the performance of the micro PEMFC, especially in the conducting area. The cell’s performance is finite when the gas reheat temperature is increased. The results show that the cell performance is better for an open ratio of 75% as compared to ratios of 50% and 67%. The concentration polarization is improved by increasing the air flow rate at high current densities, and if the GDL diffusive capability in the latter cell could be promoted, the differences between these two cells’ performances would be reduced. Furthermore, the performance at an operating voltage of 0.6 V was the most stable one among the four cases tested, and the performance deviation at a fixed operating voltage of 0.4 V was less than ±2.2%.

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