Getting Particular About Electrode-Active Materials

By modeling the particles of electrode-active materials in three dimensions, scientists in South Korea seek to improve the efficiency of power cells in electric vehicles.

AsianScientist (Jul. 23, 2019) – A team of researchers in South Korea has developed a model that allows three-dimensional (3D) observation of micrometer-sized particles in a power cell. They published their findings in the journal Nano Energy.

Electrode-active materials are crucial in the design of power cells for use in electric vehicles. However, such power cells are still not as efficient as internal combustion engines.

To improve the energy density of power cells, researchers led by Professor Lee Yong Min at the Daegu Gyeongbuk Institute of Science and Technology, South Korea, devised a ‘micron single particle electrochemical model’ that can estimate the electrochemical properties of single particles of electrode-active materials in 3D. This is an improvement over existing models that only take into account bulk materials.

Using their method, the scientists simulated the voltage profiles of lithium iron phosphate particles at different cycling rates from 2-20 degrees Celsius. The values they obtained through their simulation were approximately equivalent to the experimental voltage profiles, underscoring the accuracy of their technique.

The team expects that the accurate analysis of the properties and characteristics of 3D single particles will facilitate the design of single particles of electrode-active materials in power cells.

“Our next goal is to apply this electrochemical model to improve the cell efficiency of electric vehicles,” said Lee.

The article can be found at: Song et al. (2019) 3D Electrochemical Model for a Single Secondary Particle and Its Application for Operando Analysis.


Source: Daegu Gyeongbuk Institute of Science and Technology; Photo: Pexels.
Disclaimer: This article does not necessarily reflect the views of AsianScientist or its staff.

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