Recently, the research team of the Electrochemical Thermophysics Laboratory led by Professor Jiao Kui of Tianjin University from published a 9-page outlook article on , the world’s top journal , and is a new generation of ultra-high power density. Fuel cell engine theory and design point out the direction of development.
In order to solve the problem of increasing global energy consumption and environmental pollution caused by the use of fossil fuel energy, global renewable and environmentally friendly energy solutions continue to grow. The hydrogen economy based on renewable energy—including hydrogen production, storage, and conversion of hydrogen into electricity—is widely regarded as a promising future energy solution.
In recent years, with the rapid development of fuel cell technology, 's fuel cell engine using hydrogen energy has become the most attractive and most likely to be industrialized and commercialized clean energy power plant in the transportation field . At present, major international auto companies including Toyota and SAIC have launched mass-produced fuel cell vehicle models, and the entire industry is in a stage of rapid growth.
The development route of the new structure of ultra-high power density fuel cell membrane electrode
As an important part of the hydrogen energy social layout, the core issue of the development of fuel cell device is the improvement of its performance . At present, relevant agencies in many countries and regions have put forward clear development plans for fuel cells. In addition to hydrogen energy-related projects supported by the Chinese government, the United States, Japan, and the European Union have all proposed hydrogen energy routes. According to the above plan, plans to increase the power density of fuel cell stacks to 6-9 kilowatts per liter in the next ten years or so. At present, the world’s more advanced mass-produced fuel cell model (Toyota MIRAI-2021) can achieve a stack power density of 4.4 kilowatts per liter,Compared with the previous model released five years ago, it has increased by about 40% .
It is worth mentioning that the power density of the stacks independently developed by my country's SAIC JieHygen, Xinyuan Power and other companies has also reached the world's advanced level . However, these domestic and foreign fuel cell engines are still far from the expected performance indicators.
Description: Ultra-high power density fuel cell electrode plate design development history and trend prediction
The team of Professor Jiao Kui of Tianjin University this time looks forward to the international top publication proposes a new generation of ultra-high power density fuel cell for the first time Goal clearly points out the development route of each component and its contribution to performance improvement. The team’s vision for the design of a new generation of fuel cell engines is based on Tianjin University’s fuel cell research team 's powerful model prediction system and rich experience in production-university-research transformation. This prospect is aimed at the multi-scale electrochemistry and thermophysical processes involved in fuel cells, combined with the latest achievements in the field of energy materials, and the development route of proton exchange membrane, catalysts, gas diffusion layers, bipolar plates and other core components In-depth analysis is carried out, and specific technical indicators are given through simulation calculation.
Judging from the development history of the past two decades, the design of a new generation of fuel cells will rely heavily on the development of related energy materials and the optimization of their internal processes. However, the multi-scale complex structure and physical and chemical processes in the fuel cell have brought about this. Great challenge. The outlook article innovatively pointed out that the contribution of bipolar plates and membrane electrodes to the future power density increase is about 30% and 70%, respectively, and each component needs to be coordinated and optimized to achieve the goal. "Integration" and "ordering" are two important directions for future design: On the one hand, further thinning of the bipolar plate will greatly increase the flow resistance, which will bring difficulties to the supply of reaction gas and the circulation of the cooling liquid, so the flow The integrated design of field and electrode is a trend; on the other hand,The orderly design of the electrode can better organize the delivery process and reduce the uncertainty in the production process, which is also the future development direction.
Jiao Kui, Tianjin University Professor and doctoral supervisor of the State Key Laboratory of Internal Combustion Engine. Mainly engaged in energy utilization and engineering thermophysics research work. In recent years, he has presided over more than 30 related projects, including the National Outstanding Youth Fund, the Royal Society Newton Advanced Scholar Fund, the National Key Research and Development Program and other national and provincial projects, as well as SAIC, FAW, , Weichai, Jie Hydrogen, , Bosch, Xinyuan Power and other companies commissioned R&D projects, and the fuel cell simulation model developed has been successfully applied in many companies. Won the Fok Yingdong Young Teacher Award, Wu Zhonghua Young Scholar Award and other honors.
The co-first authors of the article include Professor Jiao Kui of Tianjin University, Loughborough University Xuan Jin and Professor Du Qing of Tianjin University, and the co-corresponding authors include Professor Jiao Kui of Tianjin University, Dr. Zhongjun Hou of SAIC JieHygen and Tianjin University Professor Michael Guiver, and other authors of the article are from Tianjin University, Imperial College London and SAIC JieHygen.
Extended reading:
The electrochemical thermophysics laboratory and fuel cell team of Tianjin University were established around 2010, and developed on the basis of the original research direction of the State Key Laboratory of Internal Combustion In a brand-new research field, a research platform of international standards has been established under the policy support of the state, schools and key laboratories.The team is mainly engaged in basic and application research of fuel cell technology, including fuel cell working process simulation, fuel cell stack and system design, fuel cell key component development (bipolar plate, membrane electrode integration, membrane material and reliability) , Fuel cell energy management and control strategy, etc. The laboratory has strong simulation computing capabilities and modeling foundations, and experimental equipment for fuel cell assembly, diagnosis and characterization. It has established close cooperative relations with well-known fuel cell companies and scientific research institutions at home and abroad.
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Content source: Tianjin University official website, Electrochemical Thermophysics Laboratory, Energy Storage Science and Technology
Image source: Tianjin University official website, Electrochemical Thermophysics Laboratory
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