Lithium-Air Battery Patent Landscape 2026
Lithium-Air Battery Patent Landscape in 2026
The lithium-air battery patent field is heavily concentrated, with Samsung Electronics holding the top position and the five largest filers collectively accounting for 39% of the hundred largest filers’ combined output. Annual filing volume peaked in 2018 and has since eased substantially, signalling a field moving past its peak growth phase even as cumulative activity across the multi-year window remains substantial.
Samsung Electronics leads a concentrated, Korean-dominated field
Samsung Electronics Co Ltd ranks first among all applicants, followed by LG Energy Solution Ltd and Honeycomb Battery Co. Korean and Korean-affiliated entities occupy four of the top five positions, establishing a clear regional dominance at the leading edge of the field.
The top five filers hold 39% of the hundred largest filers’ combined patent records, indicating a moderately high concentration. There is a visible tier gap between the top two players and the rest: LG Energy Solution’s count is roughly 77% of Samsung Electronics’, while the third-ranked Honeycomb Battery Co sits at about 41% of the leader’s level.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Samsung Electronics Co Ltd | 708 | |
| 2 | LG Energy Solution Ltd | 545 | |
| 3 | Honeycomb Battery Co | 288 | |
| 4 | Samsung SDI Co Ltd | 270 | |
| 5 | Hyundai Motor Co Ltd | 193 | |
| 6 | Contemporary Amperex Technology (Hong Kong) Limited | 176 | |
| 7 | Toyota Motor Corporation | 170 | |
| 8 | Robert Bosch GmbH | 144 | |
| 9 | Asahi Kasei Battery Separator Corporation | 91 | |
| 10 | UChicago Argonne LLC | 87 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | LG Chem Ltd | 86 | |
| 12 | Hanyang University Industry-University Cooperation Foundation | 81 | |
| 13 | Blue Current Inc | 79 | |
| 14 | Semicon Energy Lab Co Ltd | 78 | |
| 15 | University of Michigan | 76 | |
| 16 | Sionic Energy Inc | 75 | |
| 17 | KOREA ADVANCED INST OF SCI & TECH | 66 | |
| 18 | NOHMS Technologies Inc | 62 | |
| 19 | SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION | 61 | |
| 20 | IBM Corporation | 51 |
The leaders’ positions—built primarily around core battery cell and electrode technology (H01M)—suggest that fundamental electrochemistry IP is largely controlled by established Korean conglomerates and their spin-offs, raising the barrier for new entrants attempting to compete on core cell architecture rather than peripheral subsystems.
Filing counts for the most recent 18–24 months are subject to publication lag and are likely undercounted; trend readings for 2024–2026 should be treated as provisional. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Volume peaked in 2018; core battery IP dominates the technology mix
The annual filing trend and technology composition charts together reveal a field that reached maximum activity around 2018 and is now consolidating, with the vast majority of IP concentrated in core electrochemical classes rather than application or system-integration branches.
Annual filing trend
Annual filings climbed to a peak of 684 records in 2018, then declined to 354 by 2023. The 2024–2026 bars are subject to publication lag and should be read as provisional minimums rather than real declines. The multi-year recent-window growth figure of -40% reflects easing from the 2018 peak across the measured window.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells and fuel cells) accounts for the dominant share of classified records by a wide margin, confirming that IP activity is anchored in fundamental cell chemistry and electrode materials. Adjacent classes such as H01G (Capacitors), C01B (Non-metallic elements and inorganic compounds), and B60L (Electric vehicle propulsion) are present but represent a fraction of the H01M volume, pointing to relatively sparse coverage in system-integration and application-layer IP.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Lithium-air battery with sodium salt as mediator
A lithium air battery is provided. The battery comprises: an anode compartment; a cathode compartment supplied with an O<sub>2 </sub>source; and a lithium ion conductive membrane separating the anode compartment from the cathode compartment. The anode compartment comprises an anode having lithium or a lithium alloy as active metal and a lithium ion… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Metal-air accumulator with air electrode protectio… | 1,068 |
| 2 | Graphene foam-protected anode active materials for… | 360 |
| 3 | Coated electroactive materials | 315 |
| 4 | Conductive graphene polymer binder for electrochem… | 240 |
| 5 | Mesoporous carbon materials comprising bifunctiona… | 210 |
| 6 | Ultrapure synthetic carbon materials | 206 |
| 7 | Advanced Metal-Air Battery Having a Ceramic Membra… | 175 |
| 8 | Composite ionic conducting electrolytes | 162 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the landscape structure means for R&D investment decisions
Four structural observations—maturity, concentration, collaboration networks, and geographic reach—frame where risk and opportunity sit for an engineer evaluating entry or expansion in this space.
Past-peak: consolidation phase underway
Annual filings peaked in 2018 at 684 records and have eased consistently since. The lifecycle stage is characterised as Decline, driven by annual volume easing back from that peak. For R&D teams, this signals that broad foundational patenting has slowed and that differentiated, narrow claims in underserved sub-branches may offer more freedom-to-operate than broad platform filings.
Lifecycle: DeclineHigh at the top; mid-tier is fragmented
The top five filers hold 39% of the hundred largest filers’ combined patent records. Samsung Electronics alone holds 708 patent records, nearly 1.3× LG Energy Solution’s 545. Below the top two, the field fragments quickly—Honeycomb Battery Co at 288 and Samsung SDI at 270 represent a secondary tier, while ranks 5–20 span a wide range from 193 down to 51 records. This fragmented mid-tier leaves room for focused challengers in specific subsystems.
Top-5 share: 39%Automotive-academic partnerships dominate co-filing
The most active co-filing pair is Hyundai Motor and Kia, with 134 shared records, reflecting tight integration within the Hyundai Motor Group. Samsung Electronics co-files with Samsung SDI (99 records), Mie University (30 records), Seoul National University R&DB Foundation (23 records), and MIT (20 records), demonstrating a hybrid industrial-academic strategy spanning Korea, Japan, and the US. LG Chem co-files with UNIST (12 records), and Hyundai also partners with Hanyang University and Yonsei University (12 records each).
Top pair: Hyundai–Kia (134)US is the primary filing jurisdiction; Europe and China are secondary
The United States leads all jurisdictions with 2,434 patent records, followed by Europe via the EPO with 1,247 records and China with 720 records. WIPO PCT filings stand at 434, and South Korea—home of the dominant applicants—registers 381 records. Japan accounts for 138 records despite Toyota and other Japanese firms appearing in the applicant list. This US-centric filing pattern means that US freedom-to-operate analysis is the critical first step for any market entry.
Lead office: United States (2,434)Go beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Hyundai Motor Co Ltd | Kia Corporation | 134 |
| Samsung Electronics Co Ltd | Samsung SDI Co Ltd | 99 |
| Samsung Electronics Co Ltd | Mie University | 30 |
| Samsung Electronics Co Ltd | Seoul National University R&DB Foundation | 23 |
| Hyundai Motor Co Ltd | Seoul National University R&DB Foundation | 21 |
| Samsung Electronics Co Ltd | Massachusetts Institute of Technology | 20 |
| Kia Corporation | Seoul National University R&DB Foundation | 13 |
| LG Chem Ltd | UNIST (Ulsan National Institute of Science and Technology) | 12 |
| Hyundai Motor Co Ltd | Hanyang University | 12 |
| Hyundai Motor Co Ltd | Yonsei University | 12 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Samsung Electronics leads; Samsung SDI and CATL show rising momentum
The top two players both focus heavily on core H01M electrochemistry, but their recent filing trajectories diverge sharply. Mid-tier players with rising momentum—particularly Samsung SDI and CATL—represent the most active challengers in the current filing window.
Samsung Electronics Co Ltd
Samsung Electronics holds 708 patent records, the largest position in the corpus, concentrated in H01M electrode, cell, and metal-air battery subclasses. Despite its commanding total, recent filing momentum has declined sharply at –80% versus the prior three-year period, suggesting the company has shifted focus or is allowing earlier filings to mature without equivalent replacement volume.
patent records: 708Samsung SDI Co Ltd
Samsung SDI ranks fourth overall with 270 patent records, focused on H01M cell and electrode technology similar to its parent ecosystem. In contrast to Samsung Electronics, Samsung SDI shows a strongly rising recent trajectory at +125% versus the prior period, making it the most dynamically growing major incumbent in the field and a player worth monitoring for claim scope expansion.
patent records: 270| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Samsung Electronics Co Ltd | 43 | ▼ -80% |
| LG Energy Solution Ltd | 112 | ▼ -16% |
| Samsung SDI Co Ltd | 108 | ▲ +125% |
| Hyundai Motor Co Ltd | 11 | ▼ -84% |
| Contemporary Amperex Technology Co Ltd | 84 | ▲ +8% |
| Robert Bosch GmbH | 3 | ▲ new entrant |
| NOHMS Technologies Inc | 41 | ▼ -9% |
Under-served adjacent branches in EV integration, nanotechnology, and power systems
Several IPC classes adjacent to the dominant H01M core show relatively sparse coverage. These observations identify branches where patent density is low relative to the technical relevance of lithium-air chemistry to those application domains.
B60L · Electric vehicle propulsion
With 218 patent records, B60L represents a relatively thin layer of EV-integration IP despite lithium-air chemistry’s theoretical energy-density advantage for long-range vehicles. The technical connection is direct—battery system integration, battery management, and range extension are all plausible claim territories—and the low density suggests that most applicants have focused on cell-level rather than system-level IP. Engineers targeting EV OEM partnerships could find broader filing freedom here than in core H01M subclasses.
Search this in Eureka →B82Y · Nanotechnology applications
B82Y carries 149 patent records, reflecting limited but non-trivial activity at the intersection of nanotechnology and lithium-air chemistry—particularly relevant for nanostructured air cathodes and catalyst materials. The class sits adjacent to both the dominant H01M core and the C01B inorganic compounds branch (346 records). Given that nanostructured carbon and metal-oxide catalysts are active research themes, the sparse IP density in B82Y relative to the underlying science suggests an under-exploited filing angle for materials-focused entrants.
Search this in Eureka →How leading applicants differ by technology sub-route
Strength of each leader across the main technology routes.
| Player | H01M 4 · Batteries, cells & fuel cells | H01M 10 · Batteries, cells & fuel cells | H01M 12 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | H01M 2 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| Samsung Electronics Co Ltd | Strong · 491 | Strong · 433 | Strong · 391 | Moderate · 127 | Emerging · 76 |
| LG Chem Ltd | Strong · 302 | Strong · 277 | Moderate · 82 | Emerging · 36 | Emerging · 40 |
| LG Energy Solution Ltd | Strong · 214 | Strong · 246 | Absent | Emerging · 49 | Absent |
| Samsung SDI Co Ltd | Strong · 218 | Strong · 228 | Absent | Emerging · 44 | Emerging · 17 |
| Nanotek Instruments Inc | Strong · 213 | Strong · 210 | Absent | Absent | Emerging · 19 |
| Hyundai Motor Co Ltd | Strong · 155 | Absent | Strong · 182 | Emerging · 28 | Emerging · 14 |
| Robert Bosch GmbH | Strong · 88 | Strong · 90 | Strong · 76 | Absent | Emerging · 15 |
Frequently asked questions
The analysis covers 4,111 patent families in scope globally.
Samsung Electronics Co Ltd leads with 708 patent records, ahead of LG Energy Solution Ltd at 545 patent records and Honeycomb Battery Co at 288 patent records.
Annual filing activity peaked in 2018 at 684 patent records. Since then, volume has eased each year, reaching 354 in 2023. Figures for 2024–2026 are provisional due to publication lag and should not be read as confirmed declines.
The United States is the primary filing jurisdiction with 2,434 patent records, followed by Europe via the EPO with 1,247 records, China with 720 records, and WIPO PCT with 434 records.
Samsung SDI Co Ltd shows the strongest momentum among major players at +125% recent versus prior period. CATL (Contemporary Amperex Technology) shows a modest +8% rise. Robert Bosch GmbH is noted as a new entrant in the recent window. By contrast, Samsung Electronics (-80%) and Hyundai Motor (-84%) show significant recent-period declines from earlier high bases.
The most active co-filing pair is Hyundai Motor and Kia with 134 shared patent records, reflecting the Hyundai Motor Group’s integrated R&D approach. Samsung Electronics co-files with Samsung SDI (99 records), Mie University (30 records), Seoul National University R&DB Foundation (23 records), and MIT (20 records). LG Chem co-files with UNIST (12 records).
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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