LG Energy Solution Cracks the LMR Battery Problem — Now Comes the Hard Part

A lithium manganese-rich battery looks like a great idea on paper: use cheap, abundant manganese instead of expensive nickel and cobalt; squeeze extra energy out of oxygen itself; build long-range electric vehicles without the material cost. The problem is that the oxygen doesn't behave. When you charge these batteries, oxygen in the cathode oxidizes to help store energy, and on a normal charge-discharge cycle it never quite comes back. The unrecovered oxygen tears at the cathode's internal structure and generates gas. In a small lab cell, the pressure is tolerable. In the large-format cells an actual electric vehicle needs, the gas builds up and kills performance.

This gas evolution problem has blocked LMR batteries from commercialization for over a decade. Until today.

LG Energy Solution and Seoul National University announced a breakthrough that addresses the root cause, published in Nature Communications. Their 40-ampere-hour large-format LMR cell retained 92.2% of its initial energy after 883 charge-discharge cycles — the kind of stability numbers automakers need to put a battery into a vehicle.

What matters for an investor is not just that the problem was solved, but how it was solved, who owns the path forward, and how far the solution is from revenue.

The solution is process, not material

Here is what the researchers found. Oxygen recovery in LMR cathodes depends on two parameters that the battery management system controls: how high you charge and how low you discharge. At the conventional upper charge voltage of 4.6 volts, only 86% of the oxidized oxygen reduces back. Drop the charge ceiling to 4.3 volts, and that jumps to 97%. Then extend the discharge floor from the standard 3.0 volts down to 2.0 volts, and the oxygen recovers almost entirely to its original state. Combined with a lower-temperature formation process during manufacturing, gas generation in the large-format cell was effectively suppressed.

That sounds like a small tweak. It is not. The discovery means you can stabilize LMR batteries through electrochemical protocol design — the software and manufacturing process that governs how the cell is used — rather than through new material formulations. Material changes are expensive, hard to scale, and create supply chain requalification from scratch. A process adjustment changes the operating window and the activation temperature. It is easier to implement and harder for a competitor to patent around, which cuts both ways: LG Energy Solution can roll it out faster, but the solution is also less defensible through IP alone.

So where does LGES actually stand?

The IP and partnership moat

LG Energy Solution filed its first LMR patent in 2010 and holds the largest global LMR intellectual property portfolio with over 200 patents as of the end of 2024. That is 15 years of accumulated knowledge on a chemistry most competitors have treated as a dead end. The company has been quietly iterating on LMR while the broader industry chased ever-higher nickel content or pivoted to lithium iron phosphate (LFP).

The partnership with General Motors gives LGES something patents alone cannot guarantee: a committed customer with a production vehicle in sight. Ultium Cells — the 50/50 joint venture between GM and LGES — plans to begin pre-production of LMR prismatic cells in late 2027, with commercial production in the United States by 2028. GM has been developing LMR since 2015, has prototyped approximately 100 tons of LMR cathode material and hundreds of large-format cells, and validated performance equivalent to 1.4 million miles of electric vehicle driving. GM aims to be the first automaker to deploy LMR batteries, targeting electric trucks and full-size SUVs with more than 400 miles of range.

This is the kind of customer lock-in that matters. GM doesn't just buy batteries; it co-develops them, validates them at its own test centers, and builds them in its own joint venture facilities. Switching battery suppliers or chemistries for a production platform costs years and billions.

The economics LGES is betting on

The value proposition of LMR is cost and energy density simultaneously — the two metrics that usually trade off against each other.

Current high-nickel cathodes (nickel-cobalt-manganese-aluminum oxide, or NCMA) are roughly 85% nickel with small amounts of manganese and cobalt. LMR flips that: approximately 35% nickel, 65% manganese, and virtually no cobalt. Manganese is the fifth most abundant element on Earth. Cobalt is expensive, geopolitically concentrated, and ethically problematic. Nickel prices are volatile and have been trending up.

GM estimates LMR offers 33% higher energy density than the best-performing LFP cells at a comparable cost, and significant pack cost savings versus current high-nickel packs. The prismatic cell format — rectangular rather than cylindrical or pouch — reduces battery module components by 75% and total pack components by 50%. This is a real structural cost advantage if the cells hold up in volume production.

LGES describes LMR as sitting between two existing chemistries: the driving range of high-nickel, the safety of LFP, and a cost structure that beats both. If that triangle holds at gigafactory scale, it is a genuine step change for the battery industry.

The gap between today's business and tomorrow's chemistry

Here is where the investment case gets harder. LG Energy Solution is not profitable today.

In 2025, the company generated ₩23.7 trillion in revenue and ₩1.3 trillion in operating profit — a 5.7% margin that included a substantial North American production incentive. In the first quarter of 2026, LGES posted an operating loss of ₩207.8 billion as ESS production ramp-up costs hit and a major North American customer adjusted its EV battery inventory. The second quarter recovered to ₩113.3 billion in operating profit, with ESS revenue now accounting for the high-20% range of total revenue.

The company's forward P/E is around 57 — expensive by any battery manufacturer benchmark — reflecting the market's bet on ESS growth driven by AI data center power demand and grid storage. LGES is positioning itself as North America's largest ESS manufacturer, expanding production capacity to over 60GWh globally with more than 80% in North America.

LMR batteries are not part of that near-term revenue picture. Commercial production is 2028. Even if everything goes perfectly, LGES will need to qualify the cells, scale production through Ultium Cells, and demonstrate that the voltage adjustments work in millions of cells across diverse operating conditions. The technology is one generation in — LGES's own senior researcher described a Gen1 that reached mass production readiness and a Gen2 currently in development.

The capital intensity is another constraint. LGES is already targeting a 40% reduction in capital expenditure for 2026 versus 2025, focusing on maximizing existing line utilization and cutting new investments. LMR production at Ultium Cells will require dedicated lines, cathode production capacity, and quality control infrastructure. The company cannot simply convert its existing pouch lines to LMR at the push of a button.

What changes for investors

This research announcement does not move the needle on LGES's near-term earnings. What it does is strengthen the company's positioning in a specific chemistry transition that the market has not yet fully priced in.

The near-term story is ESS. LGES is riding a real wave in energy storage — data centers and grid-scale batteries are creating demand that has nothing to do with electric vehicle sales cycles. ESS revenue grew 4.6 times year-over-year in the first half of 2026. That is the cash flow story for the next 12 to 18 months.

LMR is the optionality that sits two years out. If GM and LGES execute on the 2028 commercial production timeline, and if LMR delivers on its cost and energy density promises, LGES would have a differentiated product for a segment — electric trucks and large SUVs — that is underserved by LFP and where high-nickel batteries are expensive. The 200-plus patents provide a moat against copycats, even if the voltage adjustment itself is easier to replicate than a novel material.

The risk is straightforward. Battery technology commercialization is notoriously hard, and the gap between a Nature Communications paper and a million-cell production run is where most breakthroughs die. GM has already pulled back on some EV commitments this cycle. The joint venture model means LGES shares both the upside and the execution risk. And at a forward P/E of 57, the stock is not cheap — the market has already priced in a strong ESS recovery and is giving LGES credit for future growth.

The investment question is whether you believe LGES can execute on ESS enough to support the current valuation in the near term, and whether LMR adds enough differentiated upside by 2028 to justify holding through whatever volatility the near-term results bring. The chemistry is no longer the bottleneck. The bottleneck is now production scale, customer commitment, and capital allocation — all of which take years to prove.