LG Energy Solution LMR Cell Retains 92.2% After 883 Cycles

At a Glance

LG Energy Solution and a research team led by Professor Lim Jong-woo of Seoul National University’s Department of Chemistry have developed a voltage operating range and activation process that improve the stability of large-format LMR (lithium manganese-rich) cells for electric vehicles, Maeil Business Newspaper’s business desk reported on the 7th. The key point for investors is not simply the material’s advantages, but that recurring gas formation and capacity degradation in large-format cells were controlled through an electrochemical protocol.

LMR is a cathode material that uses no cobalt and relies primarily on manganese. The findings were published in the international journal Nature Communications, but the available information did not specify a mass-production timeline or whether any automaker plans to adopt the technology.

Why It Matters Now

A major obstacle to commercializing LMR begins when oxygen oxidized during charging fails to recover sufficiently during discharge. Incomplete oxygen recovery can lead to structural damage and gas formation inside the cell, potentially causing higher pressure and degraded performance in large-format EV cells with limited internal space, Maeil Business Newspaper’s business desk explained.

The joint research team found that both the upper charging voltage and lower discharge voltage must be adjusted to improve oxygen reversibility. Lowering the LMR battery’s upper charging voltage from 4.6V to 4.3V raised the reduction rate of oxidized oxygen from 86% to 97%, according to Maeil Business Newspaper’s business desk. When the lower discharge limit was reduced to 2.0V rather than the conventional 3.0V, the oxygen returned almost entirely to its original state.

This represents a redesign of how the cell is operated and conditioned without changing the material composition itself. Based on the analysis, LG Energy Solution researchers redesigned the operating voltage range and activation conditions for a 40Ah-class large-format LMR cell and lowered the temperature during activation to suppress gas formation.

Key Issues

• Large-format cell validation: LG Energy Solution’s 40Ah-class large-format LMR cell retained 92.2% of its initial energy after 883 charge-discharge cycles under the optimized conditions. The result is significant as evidence of cycle-life stability in a large-format cell.
• Role of operating conditions: The team’s central finding is that improving oxygen recovery requires adjusting the lower discharge limit as well as reducing the upper charging limit.
• Process variable: A lower-temperature activation process was used to suppress gas formation in the large-format cell. Reproducing the result therefore requires the material’s performance and manufacturing process to work in combination.
• Outstanding unknowns: The exact year and date of the research announcement, the mass-production and commercialization schedule, whether and when automakers will adopt the technology, and specific patent and product-development terms were not disclosed.

Impact on Related Stocks and Sectors

• LG Energy Solution: The company directly participated in the research. Retaining 92.2% of initial energy after 883 charge-discharge cycles in a 40Ah-class large-format cell can be viewed as technological progress that improves the prospects for applying LMR technology to EVs. However, the result does not immediately translate into mass-production revenue or customer adoption.
• Rechargeable battery sector: LMR uses manganese as its primary raw material instead of cobalt. It may therefore attract interest for its potential raw-material cost and supply-chain benefits, but the available information provided no figures for cost savings, selling prices or production yields.
• Seoul National University researchers: Professor Lim Jong-woo’s team analyzed oxygen oxidation-reduction behavior and jointly developed the large-format cell operating conditions with LG Energy Solution. The industrial significance of the announcement lies in connecting academic research with a corporate manufacturing process.

Investment Considerations

• The 92.2% retention rate after 883 cycles was achieved under specific optimized conditions. The available information did not indicate that the result applies equally to other cell designs or production conditions.
• It remains unclear how lowering the upper charging voltage to 4.3V and extending discharge to a lower limit of 2.0V would affect real-world driving range, charging time and user operation.
• Assessing the commercial viability of LMR requires more than research findings: reproducibility in mass production, customer validation, product certification and a defined schedule are also necessary. No progress at those stages was disclosed.
• The technology’s potential to contribute to earnings would strengthen if subsequent announcements reproduce the gas-suppression results in large-format cells and provide a mass-production schedule. Conversely, if customer adoption or mass-production conditions are delayed, it would be difficult to infer business performance from current expectations for the technology alone.

Overall Outlook

This research changes the way LMR is viewed, moving beyond its description as merely a high-energy material. The team sought to improve oxygen recovery and suppress gas formation simultaneously by reducing the upper charging voltage from 4.6V to 4.3V, lowering the discharge limit to 2.0V and decreasing the activation temperature. The results from 883 cycles of a 40Ah-class cell, as reported by Maeil Business Newspaper’s business desk, provide evidence that commercialization potential was tested in large-format EV cells rather than only in small cells.

However, a gap remains between the research outcome and commercialization. Until a mass-production or EV adoption schedule is confirmed, technological progress and revenue generation should not be treated as the same event. The assessment would carry greater weight if subsequent disclosures or research announcements confirm reproducibility under the same operating conditions, provide further cycle-life testing and report customer adoption.

Frequently Asked Questions

What is an LMR battery?

LMR is a lithium manganese-rich battery cathode material that uses no cobalt and relies primarily on manganese. This research focused on controlling oxygen recovery and gas formation in large-format LMR cells through voltage and process conditions.

Why was the charging voltage lowered to 4.3V?

According to Maeil Business Newspaper’s business desk, lowering the upper charging voltage from 4.6V to 4.3V improved the reduction rate of oxidized oxygen from 86% to 97%. Better oxygen recovery creates more favorable conditions for reducing gas formation and structural damage in large-format cells.

Has this research secured mass production of LMR batteries?

No. The research team’s 40Ah-class large-format cell retained 92.2% of its initial energy after 883 charge-discharge cycles, but the available information did not confirm a mass-production schedule or adoption by automakers.

This article was automatically summarized and analyzed based on the original news report. View the original article (Maeil Business Newspaper—Business)