KAIST's Breakthrough Extends Solid Oxide Fuel Cell Lifespan
Scientists at the Korea Advanced Institute of Science and Technology (KAIST) have made a breakthrough in solid oxide fuel cells. These cells, made from ceramic materials, can efficiently convert biomass and liquid gas into electricity. The key to their success lies in the cathode, which can now have its lifespan significantly increased.
The cathode, typically made of oxide materials with a perovskite structure, is prone to degradation due to the accumulation of strontium oxides on its surface. This reduces its performance over time. However, KAIST researchers have found a way to mitigate this issue. By inserting metals at strategic points in the material lattice, they can reduce local material stresses around strontium atoms. This inhibits the formation of strontium oxides, thus enhancing the cathode's lifespan.
The team used computational chemistry and experimental data to arrive at this conclusion. While the specific metals used are not mentioned in the search results, the method involves doping cathodes with minimal amounts of metal. This not only extends the lifespan of the cathode but also improves the overall performance of the solid oxide fuel cells.
KAIST's discovery promises to revolutionise the use of solid oxide fuel cells. By increasing the lifespan of the cathode, these cells can now convert biomass and liquid gas into electricity more efficiently and for longer periods. Further research is needed to identify the optimal metals for doping, but the potential benefits for clean energy production are significant.
