Lithium-Air Battery Electrolyte Patent Landscape 2026
Lithium-Air Battery Electrolyte Patent Landscape in 2026
The lithium-air battery electrolyte field is still expanding on a multi-year basis, though annual volume has eased from its 2017 peak and the most recent years are further understated by publication lag. Activity is fragmented across universities and research institutes, with no single commercial player yet holding a commanding position.
Fragmented field led by AMPCERA with strong academic representation
AMPCERA Inc leads. The top five filers account for 37% of the combined total of the hundred largest filers, signaling a fragmented competitive structure with no dominant incumbent.
The top tier is separated from a broad second tier by only one or two patent records per applicant, indicating that the gap between leader and challengers is narrow. Most filers are universities or national research institutes rather than integrated battery manufacturers.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | AMPCERA Inc | 4 | |
| 2 | Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 3 | |
| 3 | Cornell University | 3 | |
| 4 | UNIST (ULSAN NAT INST OF SCI & TECH) | 2 | |
| 5 | Nanyang Technological University | 2 | |
| 6 | Nanjing Tech University | 2 | |
| 7 | Nanjing University | 2 | |
| 8 | Beijing Institute of Technology | 2 | |
| 9 | Nankai University | 2 | |
| 10 | RES INST OF IND SCI & TECH | 2 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | POHANG IRON & STEEL CO LTD | 2 | |
| 12 | UNIST Industry-Academic Cooperation Foundation | 2 | |
| 13 | Battelle Memorial Institute | 2 | |
| 14 | Zhengzhou University | 1 | |
| 15 | Hanyang University Industry-University Cooperation Foundation | 1 | |
| 16 | Beijing Normal University | 1 | |
| 17 | Hyundai Motor Company | 1 | |
| 18 | Jilin Normal University | 1 | |
| 19 | Northeast Normal University | 1 | |
| 20 | SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION | 1 |
AMPCERA’s position as the sole private-sector leader suggests commercial players have not yet moved aggressively to consolidate intellectual property in this space, leaving room for both academic-to-industry technology transfer and new corporate entrants.
The most recent 18–24 months of filing data are subject to publication lag and likely undercount actual activity; the apparent slowdown in 2024–2026 data should not be interpreted as a real decline. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth intact despite post-peak annual variation
Two complementary views reveal the field’s trajectory and technical focus: an annual filing trend spanning 2017 to 2026, and the IPC class composition of all records in scope.
Annual filing trend
Annual filing volume peaked in 2017, then showed year-to-year variation through 2022–2023, before easing again in 2024–2026. The recent three-year window sits 60% above the prior three-year window, confirming multi-year growth despite the annual fluctuation. Data for 2024 onward should be read cautiously given publication lag.
↗ Hover for values · click a bar to ask EurekaTechnology composition
The dominant IPC class is H01M (Batteries, cells and fuel cells), which accounts for the substantial majority of patent records. Two smaller adjacent classes appear: D01D (Man-made filament spinning, reflecting nanofiber membrane and separator work) and H01G (Capacitors, reflecting hybrid energy-storage architectures). The concentration in H01M confirms electrolyte chemistry and cell-level engineering as the core technical battleground.
↗ 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.
Nanostructures for lithium air batteries
Provided herein are lithium-air battery cells comprising nanostructured (e.g., nanofiber) anode, cathode, and/or separator/electrolyte components. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Nanostructures For Lithium Air Batteries | 40 |
| 2 | 一种复合凝胶聚合物电解质、制备方法及其在锂空气电池中的用途 | 23 |
| 3 | Nanostructures for lithium air batteries | 16 |
| 4 | Ionic liquid electrolyte and fluorinated carbon el… | 14 |
| 5 | Electrolyte for lithium air battery and lithium ai… | 12 |
| 6 | 五氯化钼为氧化还原介质的锂氧气电池电解液及其制备和应用 | 10 |
| 7 | Preformation of solid electrolyte interphase on el… | 10 |
| 8 | Systems and methods for induction heating of elect… | 5 |
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 competitive structure means for R&D investment
Four structural dimensions — maturity, concentration, collaboration, and geography — shape the risk-return profile for new entrants and incumbents alike.
Growth stage with easing annual peaks
The field is classified as Growth: the recent three-year filing window is 60% above the prior three-year window, confirming sustained multi-year expansion. Annual volume eased from its 2017 peak, but this reflects neither saturation nor decline — it reflects a field still broadening its technical scope. New entrants can still establish positions before the field consolidates.
Growth stageFragmented across academic institutions
The top five filers hold 37% of the combined filing activity among the hundred largest filers, and most are universities or research institutes rather than OEMs. This structure means no single entity controls a blocking portfolio, but it also means that any team seeking freedom-to-operate must map rights held by a diverse set of academic assignees across multiple jurisdictions.
Low concentrationPOSCO–RIST–UNIST triangle is the most active co-filing cluster
The strongest co-filing relationships are between POSCO (Pohang Iron and Steel), the Research Institute of Industrial Science and Technology (RIST), and UNIST’s industry-cooperation foundation — each pair has co-filed 2 patent records. UNIST also co-files with Kia Motors and Hyundai Motor, and with the Seoul National University R&DB Foundation, indicating that Korean automotive and steel interests are building electrolyte IP through university partnerships.
Korean clusterChina dominant; US and Korea meaningful second-tier offices
China is the leading jurisdiction with 16 patent records, followed by the United States with 8 and South Korea with 5. Three records were filed via WIPO PCT, indicating a subset of applicants seeking broad international coverage. R&D teams targeting commercial deployment should monitor Chinese and US prosecution closely, as both markets have active assignees and potentially overlapping claims.
China-ledGo 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 |
|---|---|---|
| POSCO (Pohang Iron and Steel Co., Ltd.) | Research Institute of Industrial Science and Technology (RIST) | 2 |
| POSCO (Pohang Iron and Steel Co., Ltd.) | UNIST Industry-Academic Cooperation Foundation | 2 |
| Research Institute of Industrial Science and Technology (RIST) | UNIST Industry-Academic Cooperation Foundation | 2 |
| Ulsan National Institute of Science and Technology (UNIST) | Kia Motors Corporation | 1 |
| Ulsan National Institute of Science and Technology (UNIST) | Hyundai Motor Company | 1 |
| Ulsan National Institute of Science and Technology (UNIST) | Seoul National University R&DB Foundation | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
AMPCERA leads; Dalian Institute of Chemical Physics is the fastest-growing academic filer
The two leading filers represent distinct organizational models — a US-based private-sector materials company and a Chinese national research institute — with technology emphasis that differs at the sub-class level.
AMPCERA Inc
AMPCERA holds 4 patent records, the highest count in the corpus, with a primary focus on H01M 10 (secondary batteries and electrolyte systems) and H01M 50 (battery structural components), plus one record in H01G 11 (hybrid capacitors). Their momentum is flagged as a new entrant, indicating their filings are concentrated in the recent window with no prior baseline — a profile consistent with a startup building its foundational IP position in solid and advanced electrolyte chemistries.
patent records: 4Dalian Institute of Chemical Physics (CAS)
The Dalian Institute of Chemical Physics (Chinese Academy of Sciences) holds 3 patent records, with equal coverage of H01M 10 and H01M 12 (metal-air and electrochemical cells), plus one record in H01M 8 (fuel cells), indicating breadth across related electrochemical systems. Like AMPCERA, their momentum is classified as a new entrant, with all recent filings falling within the latest measurement window — consistent with a research institute rapidly converting fundamental electrochemistry research into filed IP.
patent records: 3| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| AMPCERA Inc | 2 | ▲ new entrant |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 3 | ▲ new entrant |
Nanofiber membranes and hybrid capacitor architectures are under-served adjacent areas
Two IPC branches outside the dominant H01M class appear in the corpus with low patent counts, representing areas of relative sparsity adjacent to the core electrolyte space. These are observations of low filing density; technical and commercial viability should be verified independently before treating them as investment targets.
D01D · Man-made filament spinning (nanofiber separators/membranes)
Only 2 patent records in this corpus fall under D01D, representing 6% of IPC-level records. The branch is linked to electrospun nanofiber membranes used as electrolyte hosts or separators in lithium-air cells — a technically plausible route because nanofiber architectures can improve oxygen diffusion and electrolyte retention simultaneously. Cornell University’s filings are the primary source of this signal. The low count suggests that nanofiber-specific claims within the lithium-air electrolyte context are not yet densely contested, offering a potential entry path for materials or fiber-processing firms with existing D01D expertise.
Search this in Eureka →H01G · Capacitors (hybrid energy-storage architectures)
Only 1 patent record falls under H01G in this corpus, representing 3% of IPC-level records — the sparsest adjacent branch observed. This branch likely reflects hybrid lithium-air/supercapacitor architectures where the electrolyte must serve dual roles. While technically interesting for applications requiring high power bursts alongside high energy density, the single-record count means the technical feasibility and commercial path are not yet established in the patent literature for this topic. Teams active in hybrid electrochemical devices may find this an open area, but should treat it as an early-stage observation rather than a validated opportunity.
Search this in Eureka →Leaders differ on cell-level versus structural sub-class emphasis
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 12 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells | H01M 8 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| Cornell University | Strong · 2 | Strong · 3 | Strong · 3 | Strong · 2 | Absent |
| AMPCERA Inc | Strong · 4 | Absent | Absent | Moderate · 1 | Strong · 3 |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | Strong · 3 | Strong · 3 | Absent | Moderate · 1 | Absent |
| Beijing Institute of Technology | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
| Nanjing Tech University | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
| Nankai University | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
| UNIST Industry-Academic Cooperation Foundation | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
Frequently asked questions
The corpus covers 24 patent families. This is a specialized, early-stage field, so the absolute count is small relative to mainstream lithium-ion electrolyte domains.
AMPCERA Inc holds the most patent records in the ranking with 4, making it the sole private-sector leader ahead of academic institutions such as the Dalian Institute of Chemical Physics (CAS) and Cornell University, each with 3 patent records.
Yes, on a multi-year basis. The recent three-year filing window is 60% above the prior three-year window, placing the field in a Growth stage. Annual volume has eased from a 2017 peak, and the most recent years (2024–2026) are further understated by publication lag, so the apparent recent slowdown should not be read as a real decline.
China is the leading jurisdiction with 16 patent records, followed by the United States with 8 and South Korea with 5. Three records were filed via WIPO PCT, indicating some applicants are pursuing broader international protection.
The most active co-filing cluster is a Korean triangle: POSCO (Pohang Iron and Steel), the Research Institute of Industrial Science and Technology (RIST), and UNIST’s industry-cooperation foundation have each co-filed 2 patent records with one another. UNIST also co-files with Kia Motors, Hyundai Motor, and the Seoul National University R&DB Foundation.
The most-cited work in the corpus is a document titled ‘Nanostructures For Lithium Air Batteries’ with 40 citations, followed by a Chinese-language patent on composite gel polymer electrolytes with 23 citations, and a second nanostructures document with 16 citations. An ionic liquid electrolyte and fluorinated carbon electrolyte patent follows with 14 citations.
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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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