51视频

05/13/2024
By Edwin L. Aguirre

The National Science Foundation has recognized Asst. Prof. Xinfang Jin of the Department of Mechanical and Industrial Engineering with its prestigious faculty early career development CAREER award.

This highly competitive annual program selects the nation鈥檚 best young university faculty-scholars 鈥渨ho most effectively integrate research and education within the context of the mission of their organization,鈥� according to the agency.

Jin, who joined 51视频 in 2018, will use her CAREER grant, worth nearly $650,000 spread over five years, to research ways to greatly .

Specifically, Jin will study mechanisms that would enable devices called reversible solid oxide cells, or RSOCs, to efficiently switch between producing 鈥渞obust鈥� amounts of hydrogen and generating electricity.

Hydrogen, a clean, renewable alternative to fossil fuels, can supply the world鈥檚 energy needs for power generation, industry and transportation while significantly reducing emission of greenhouse gases into the atmosphere. Hydrogen used in a to generate electricity produces only water vapor as a byproduct.

鈥淩SOCs can potentially revolutionize the way power is generated and hydrogen fuel is produced,鈥� says Jin. She says the devices can store excess electricity generated from other renewable sources like solar and wind by converting the surplus into hydrogen.

鈥淭his stored energy can then be used when demand is high or when solar and wind are not available, ensuring a steady and reliable power supply,鈥� Jin says.

RSOCs can also be used in remote or off-grid locations to produce electricity and heat from locally available fuels or stored hydrogen, providing reliable energy and heating to communities without access to centralized power grids, she adds.

However, despite their technological promise, RSOCs face major challenges in durability due to the rapid degradation of the cells (a process called 鈥渄elamination failure鈥�) under prolonged, high-temperature operating conditions, according to Jin.

鈥淢y goal is to understand the complex delamination mechanisms taking place within the devices,鈥� she explains. 鈥淏y developing mitigation strategies to overcome these challenges, we could use RSOCs to drastically reduce the cost of large-scale, long-duration energy storage as well as to promote the integration of renewable energy sources into the power grid.鈥�

Jin鈥檚 collaborators on the project include UML Mechanical Engineering Assoc. Prof. Scott Stapleton, Mingyuan Ge of Brookhaven National Laboratory and Prof. Kevin Huang of the University of South Carolina, Columbia. Assisting Jin in the lab work is UML doctoral student Yasser Shoukry.

Extending the Devices鈥� Lifespan

RSOC devices switch between two opposite operating modes 鈥� the electrolysis mode for producing hydrogen and the fuel cell mode for generating electricity. According to Jin, rapid degradation occurs during the electrolysis mode, caused by delamination failure at the cells鈥� oxygen electrode-electrolyte interface.

Jin and her team will use an integrated mechanical and electrochemical approach to unravel the degradation process.

鈥淭his is the first time advanced, full-field X-ray imaging techniques and 3D multiphysics simulations will be conducted to understand the degradation mechanisms of the RSOC鈥檚 electrodes, which have very complicated microstructures,鈥� she says. 鈥淗opefully, our findings will lead to improved design of new oxygen electrodes to extend the device鈥檚 lifespan as well as develop protocols for safe operation of the cells.鈥�