From lab to industry: 3D printing accelerates the future of lithium batteries

The review shows that 3D printing can move battery manufacturing beyond the geometric limits of conventional coating-based production. Instead of relying on flat, stacked shapes, 3D printing enables precise control over three-dimensional structures. This topology-driven design can shorten ion-transport pathways, improve electron conduction, reduce local stress concentration during cycling, and enhance mechanical robustness. In this sense, 3D printing is not simply a new processing method, but a way to redesign how electrochemical performance is built into battery structure itself.

The paper places particular emphasis on all-solid-state lithium batteries, where both energy density and interface quality are critical. For these systems, the challenge is not merely to print battery components, but to fabricate thin, structurally precise solid-electrolyte architectures while maintaining low interfacial resistance and reliable ionic transport. The review critically analyzes the key scientific bottlenecks involved, especially the trade-off between high ceramic filler content, ink rheology, sub-100-micrometer structural fidelity, and interfacial integrity in composite solid electrolytes.

"We believe the next stage of progress will depend on integrating artificial intelligence (AI) with 3D printing," says Siraprapha Deebansok (Tohoku University). "The guidance of data-driven AI can help us move away from trial-and-error, and towards intelligent manufacturability."

This research provides one of the most comprehensive roadmaps to date for applying 3D printing technologies to lithium battery manufacturing. The research team thoroughly examines how the precise control of 3D printing could improve a battery's energy density, safety, and stability. This framework may accelerate the design of advanced batteries for electric vehicles, flexible electronics, and grid-scale energy storage.