Lithium-ion batteries are not ideal because they are potentially unstable, and their liquid electrolyte can overheat and catch fire. Solid state batteries appear to be an improvement over this, but only if they have sufficient density. Scientists at Aalborg University in Denmark say they can improve this situation with glass electrodes in solid state batteries.
Solid State a Realistic Option With Glass-Based Electrodes
The Danish researchers believe that solid state batteries have great potential to replace the current lithium-ion option. Their research paper, which we link to below, details their proposal to improve solid state batteries further.
They recommend using glass-based electrodes in a solid state core. And they are working on increasing energy density right now, while also reducing the fire hazard according to an Aalborg University update we link to below.
“Rechargeable batteries play a central role in the green transition,” explains Professor Morten Mattrup Smedskjær. “They store energy from wind turbines and solar cells, and are crucial for electric cars due to their high energy efficiency.
“However, we need to develop new batteries that can offer improved energy density, longer lifespan, and less fire hazard.” This is the focus point of their interest in glass electrodes in solid state batteries.
Computer Simulations Point the Way Forward to Glass Electrodes
Structural disorder in materials – such as present in glass – refers to a lack of a regular, repeating pattern in the arrangement of atoms or molecules. In other words, the structure deviates from a perfect crystalline lattice.
The Danish researchers used computer simulations to investigate how this structural disorder improves ion conductivity, in electrolyte materials. Their key finding is that glass ceramics, comprising a blend of order and disorder, deliver the highest ion conductivity.
Discovering the right blend of the two, is a way forward to more conductive solid electrolytes, and safer and higher-energy batteries. This finding could reach the market in electric vehicles that charge faster, yet have a longer driving range too.
More Information
Solid Ceramic Electrolytes For Our Future
Reducing Resistance in Solid State Batteries
