Cybertruck upgrade Dry cathode batteries are entering the testing phase

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Tesla recently confirmed the testing of a new model of the Cybertruck, which has only just been released in the US. The special feature here: dry cathode batteries are used. But what does the technology really bring, and is that enough to boost sales in the future?

Dry cathode batteries, also known as solid-state batteries, offer a number of advantages over conventional lithium-ion batteries. They are safer, have a longer lifespan, a higher energy density, and can also be charged faster. It sounds like the holy grail of battery development.

To this end, Tesla acquired the company Maxwell five years ago, which specializes in dry cathode technology. Dry cathode batteries, like those from the firm Maxwell, function by using a solid cathode and a solid electrolyte instead of the conventional liquid electrolytes. In these batteries, the cathode, which is usually a mixture of various materials like nickel, manganese, and cobalt, is used in solid form, often as a thin foil or layer. This solid cathode is connected to a solid electrolyte, which transports ions between the cathode and the anode.

This design allows for higher energy density and improved safety, as the risk of leaks or fires from liquid electrolytes is eliminated. Maxwell's technology focuses on improving energy density and charge cycle stability through advanced materials and production methods, leading to more powerful and durable batteries.

Actually, Tesla works exclusively with Panasonic in the field of battery cells. The first Gigafactory in Nevada was created in collaboration with Panasonic. However, with the acquisition of Maxwell, Tesla laid the foundation for its own cell production. Maxwell's expertise lies in the dry electrode coating process. Originally developed for the production of supercapacitors, it now seemingly ready for series production of battery cells.

The 4680 cells are used as the format for the dry cathode batteries. The batteries have the potential to be more cost-effective than traditional lithium-ion batteries as their production is more efficient and requires less energy. The elimination of the expensive and energy-intensive firing process, as well as the removal of toxic solvents, significantly reduces production costs. In addition, it significantly reduces environmental impact.

Tesla is currently expanding battery production further. The know-how is within the company itself and is not purchased. This reduces dependence on external suppliers and provides more control over the supply chain, which can and will lead to further long-term cost savings. For the Cybertruck specifically, this could mean that the battery will become cheaper and the vehicle more powerful in the future. Additionally, improved safety due to the elimination of liquid electrolytes could be an important selling point for electric vehicles in general. (mr)

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