When will they finally hit the market? Solid-state batteries have the potential to offer higher energy density, more safety and faster charging than conventional liquid electrolyte lithium-ion batteries, but what is the science behind them, the potential of the technology and the challenge? We asked two of the most internationally renowned researchers in the field: Prof. Dr. Jennifer Rupp (TU Munich) and Prof. Jürgen Janek (JLU Giessen). Many OEMs are also hoping to realize the benefits. VW is investing in QuantumScape, ProLogium is partnering with Mercedes, and BMW is working with Solid Power. However, solid-state batteries are currently immature, leading to uncertainties and concerns about high production costs and scalability. The development challenges are to transform the insertion or deposition of solid electrolytes into a process that is compatible with current manufacturing practices without compromising the durability or cost of the final product, while providing benefits such as better energy and power density, increased safety, and higher throughput.
