It's in the title, and the title is the strategy: "Lithium-free secondary battery." LG Energy Solution's grant US12651781B2 (issued June 9, 2026) describes what the field calls an anode-free cell — a battery that ships without a conventional anode material like graphite or silicon at all.
Here's the mechanism. In a normal cell, the anode is a coated electrode that hosts lithium when charged. In an anode-free cell, you start with just a bare copper current collector. On the first charge, lithium from the cathode plates directly onto that copper, forming the anode in situ. Strip out the graphite, the binder, and the extra copper, and you remove weight, volume, and bill-of-materials cost in one move — anode-free designs can push energy density meaningfully higher than even a silicon anode.
Follow the cost and you see why a cell maker files here. The anode is a real fraction of a cell's materials and processing cost. An architecture that deletes it is not a marginal efficiency — it's a structural cost reduction, which is exactly the kind of thing a manufacturer protects with IP rather than publishes.
Now the take-or-pay-it's-everything caveat: anode-free cells are notoriously hard to cycle. Lithium plated onto a bare collector tends to deposit unevenly, forming dendrites and dead lithium that eat capacity fast. That's why anode-free has lived in the lab for years despite obvious appeal — and why a granted patent in this space is interesting precisely for whatever it claims about controlling that deposition.
For the business read: an anode-free grant from a top-three cell maker like LG is a signal about where commercialization attention is going, not proof of a near-term product. The architecture pairs naturally with solid-state electrolytes, which suppress the dendrites that wreck anode-free cells — so this grant is best read alongside the sulfide-electrolyte work, not on its own.
A patent claims a specific construction, not a yield or a ship date. But the direction is unambiguous: the cheapest anode is no anode, and the industry's best-funded players are filing to own how that's done.