A global team of scientists, including nanoengineers from the University of California San Diego, has discovered nanoscale changes within solid-state batteries that could provide new insight into enhancing battery efficiency. By utilizing computer simulations and X-ray experiments, the researcher
changes within solid-state batteries that could provide new insight into enhancing battery efficiency.
But a major issue with these batteries is that the movement of lithium ions is more restricted, particularly where the electrolyte makes contact with the electrode. The new technique that they developed combines two established approaches. The first is X-ray adsorption spectroscopy, which involves hitting a material with X-ray beams to identify its atomic structure. This method is useful for probing the lithium ions deep inside the material, but not at the interface. So the researchers used a second method, called second harmonic generation, which can identify atoms specifically at an interface.
“The theoretical work enabled us to fill in the blanks and provide clarity on the signals that we were seeing in the experiments,” said study co-first author Sasawat Jamnuch, a nanoengineering Ph.D. student in Pascal’s research group who recently defended his doctoral thesis. “But a bigger advantage of the theory is that we can use it to answer additional questions. For example, why do these signals appear the way they do?”Jamnuch and Pascal took the work a step further.
He described the barrier to ion movement as similar to what a ball would experience if it was bouncing inside a room where the walls were also moving.
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