A solid-state battery is part of a broader family of lithium-based energy technologies that replace, reduce, or structurally constrain the traditional liquid electrolyte used in conventional lithium-ion batteries.
Within this “XSSB solid-state family,” there are multiple approaches to electrolyte design. These include fully solid ceramic electrolytes, oxide-based systems, sulphide-based systems, polymer-based systems, and hybrid or gel-like structures. New variations continue to emerge as research and manufacturing capabilities evolve.
Fully solid ceramic batteries (often referred to as true ASSB systems) offer strong theoretical safety and stability advantages. However, in practice, they can be brittle, sensitive to mechanical stress, and difficult to manufacture consistently at scale. These limitations have slowed their widespread commercial adoption.
As a result, the most advanced and commercially viable solutions today sit within a hybrid category — where the electrolyte is not free-flowing, but instead immobilised within a structured matrix.
At Density, we refer to this as a Matrix architecture.
This approach uses an immobilised electrolyte held within a solid framework (which may incorporate polymer, oxide, or sulphide materials), allowing efficient ion transport while removing the behaviour of a liquid system. The result is a stable, durable, and scalable battery design.
Density works with leading global advanced cell manufacturers to access and integrate these technologies, with exposure to over 100 different chemistry and architecture variations. This allows us to deliver both tailored project solutions and our own branded battery systems.
In practical terms, Matrix-based or other condensed batteries represent the current best balance between safety, performance, manufacturability, and real-world deployment.