SOFC Electrode Materials Patent Landscape 2026
The SOFC electrode materials patent field is moderately concentrated, with Ceres Intellectual Property Company Limited holding the largest position among a field that spans commercial developers, national labs, and universities. Annual filing volume has eased back from its 2017 peak, and the field is in a decline stage, though the United States remains by far the dominant filing jurisdiction.
Moderate concentration with a clear leader and strong academic presence
Ceres Intellectual Property Company Limited leads the applicant ranking, followed closely by Danmarks Tekniske Univ (Technical University of Denmark) and. The Trustees of the University of Pennsylvania. The top five filers collectively account for 26% of the hundred largest filers’ combined total, indicating a moderately concentrated but not monopolized field.
The gap between the leader and the second-ranked applicant is relatively narrow — 53 patent records versus 40 — and several universities (University of Maryland, University of Pennsylvania, Technical University of Denmark) sit alongside commercial entities in the top tier, reflecting ongoing academic research activity alongside industry development.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Ceres Intellectual Property Company Limited | 53 | |
| 2 | Technical University of Denmark (DTU) | 40 | |
| 3 | The Trustees of the University of Pennsylvania | 36 | |
| 4 | University of Maryland | 35 | |
| 5 | SAINT GOBAIN CERAMICS & PLASTICS INC | 32 | |
| 6 | Phillips 66 Company | 27 | |
| 7 | Bloom Energy Corporation | 26 | |
| 8 | NGK Insulators Ltd | 21 | |
| 9 | Atomic Energy Council Institute of Nuclear Energy Research (Taiwan) | 19 | |
| 10 | Battelle Memorial Institute | 17 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Redox Power Systems LLC | 16 | |
| 12 | University of Florida Research Foundation Inc | 14 | |
| 13 | Sumitomo Metal Mining Co Ltd | 14 | |
| 14 | Yara International ASA | 13 | |
| 15 | Chaozhou Three-Circle Group Co Ltd | 13 | |
| 16 | The Dow Chemical Company | 12 | |
| 17 | Saudi Arabian Oil Company (Saudi Aramco) | 11 | |
| 18 | Nissan Motor Co Ltd | 9 | |
| 19 | Beijing Institute of Technology | 9 | |
| 20 | Shenzhen University | 9 |
Ceres’s sustained lead, built primarily around H01M fuel-cell and C01G metal-compound sub-classes, signals a deep IP position in core electrode chemistry. Commercial players such as Saint-Gobain Ceramics & Plastics, Phillips 66, and Bloom Energy occupy the mid-tier, reflecting diversified industrial interest across ceramics, energy, and downstream fuel-cell integration.
Patent records filed in the most recent 18–24 months are subject to publication lag and are likely under-counted; the 2025–2026 data points should not be read as a confirmed structural shift. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Annual volume easing from a 2017 peak; H01M dominates with adjacent ceramic and process branches
The trend chart tracks annual filing volumes from 2017 onward, while the technology composition chart breaks activity across IPC classes to show where technical effort is concentrated and where adjacent branches remain sparse.
Annual filing trend
Filings peaked at 57 in 2017 and have trended downward since, with a partial recovery to 43 in 2021 before easing again. The 2025 and 2026 data points are almost certainly under-counted due to publication lag and should not be interpreted as a continued decline. The overall direction from 2017 onward is consistent with the field’s decline-stage classification.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells and fuel cells) is overwhelmingly dominant. C04B (ceramics, cement and refractories) and C01G (compounds of other metals) are the next most active branches, reflecting the ceramic oxide and perovskite chemistry central to SOFC electrodes. Coating processes (B05D), catalysis (B01J), and inorganic compounds (C01B) each hold smaller but technically relevant shares, pointing to process-engineering and precursor-chemistry work adjacent to core electrode design.
↗ 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.
Anode material for solid oxide fuel cell, and anod…
A composite anode material for a solid oxide fuel cell (SOFC), an anode for a SOFC including a Ni-containing alloy including Ni and a transition metal other than Ni; and a perovskite metal oxide having a perovskite structure. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Fuel water vapor replenishment system for a fuel c… | 173 |
| 2 | Hybrid thin film/thick film solid oxide fuel cell … | 173 |
| 3 | Load matched power generation system including a s… | 162 |
| 4 | Roughened electrolyte interface layer for solid ox… | 140 |
| 5 | Electrode structure for solid state electrochemica… | 140 |
| 6 | Electrode structure for solid state electrochemica… | 134 |
| 7 | Solide oxide fuel cell stack with composite electr… | 125 |
| 8 | Solid oxide fuel cell components and method of man… | 120 |
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, and geography — shape where incremental R&D effort is most likely to find defensible white space or face established opposition.
Decline stage: past-peak annual volume, but core IP still active
The lifecycle evidence places this field in decline, with annual filings easing back from the 2017 peak. This suggests the foundational electrode chemistry IP (dominated by H01M) is maturing, and incremental improvements in core compositions face a dense prior-art landscape. R&D investment is most defensible in adjacent branches — ceramics processing, novel metal-compound precursors, and coating methods — where filing density remains lower.
Lifecycle: DeclineModerate concentration with a mixed academic-commercial top tier
The top five filers hold 26% of the hundred largest filers’ combined total. The presence of three universities in the top five means a significant portion of the leading IP is academically held, which may be licensable. Commercial mid-tier players (Saint-Gobain, Phillips 66, Bloom Energy, NGK Insulators) each occupy distinct niches — ceramics, downstream fuel processing, and system integration — reducing direct head-to-head overlap at the portfolio level.
Moderate concentrationUniversity of Maryland and Redox Power Systems are the only identified co-filing pair
The evidence shows one active co-applicant relationship: the University of Maryland and Redox Power Systems LLC, with three co-filed patent records. This pairing reflects a known technology-transfer relationship in intermediate-temperature SOFC development. Beyond this pair, the collaboration network appears sparse, suggesting most players develop IP independently — an environment where strategic academic licensing or consortium formation could provide competitive leverage.
Sparse co-filingUS leads jurisdiction coverage; China is a strong second
The United States is the primary filing jurisdiction, with Europe (EPO) and China forming the next tier. South Korea, Canada, and Australia also show meaningful coverage. Japan has only a small recorded presence despite established domestic SOFC programs (e.g., NGK Insulators), suggesting some players may file primarily through PCT or EPO routes. Filing activity in China reflects both foreign applicants seeking protection and growing domestic research at institutions such as Shenzhen University and Beijing Institute of Technology.
US-led, global spreadGo 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 |
|---|---|---|
| University of Maryland | Redox Power Systems LLC | 3 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Ceres and Technical University of Denmark lead; universities and energy companies fill the mid-tier
The top two filers are separated by 13 patent records, and both focus their activity squarely in H01M fuel-cell sub-classes. Applicant momentum data is not available in this dataset, so trajectory reads rely on portfolio size and technology emphasis alone.
Ceres Intellectual Property Company Limited
Ceres holds 53 patent records, the largest position in the corpus. Its technology focus is concentrated in H01M 4 and H01M 8 (electrode and cell sub-classes), with a secondary presence in C01G 51 (metal oxide compounds), consistent with its steel-cell SOFC platform using mixed-oxide electrode materials. No applicant momentum data is available to characterize recent trajectory.
patent records: 53Danmarks Tekniske Univ
Technical University of Denmark holds 40 patent records, ranking second. Its portfolio is almost exclusively concentrated in H01M 8 and H01M 4, with a trace presence in C25B 13 (electrolytic production), reflecting its research profile in solid oxide electrochemistry and electrolysis. As a university filer, its IP may be accessible through licensing. No applicant momentum data is available.
patent records: 40Ceramics processing, metal-compound chemistry, and coating methods are under-served relative to core H01M activity
Compared with the dominant H01M branch, the following IPC classes show materially lower filing density. They are observations of relative sparsity; entry-path assessment requires validation against commercial requirements and freedom-to-operate analysis.
B05D · Coating processes for SOFC electrode layers
Coating processes (B05D) account for a small share of activity in the corpus and are adjacent to the dominant H01M electrode work. Thin-film and solution-based deposition methods are central to achieving electrode microstructures that reduce polarization resistance. The sparsity here — relative to the ceramic and fuel-cell core — suggests that process IP for advanced coating routes (e.g., infiltration, atomic layer deposition, spray pyrolysis) may have available space, particularly for intermediate-temperature SOFC architectures where electrode morphology control is critical.
Search this in Eureka →C01G · Metal-compound precursors for electrode synthesis
C01G (compounds of other metals, including transition metal oxides and perovskites) is the third-largest branch but still holds a small share relative to H01M. Perovskite and double-perovskite compositions are the primary electrode materials for both cathode and anode sides, yet precursor synthesis IP in this class is sparse. New filers with expertise in oxide chemistry or rare-earth-doped materials could pursue defensible positions here, particularly for compositions targeting proton-conducting SOFC variants or reversible solid oxide cell operation.
Search this in Eureka →How leading filers differ by IPC technology route
Route coverage across the main technology branches in the current evidence set.
| Player | H01M 4 · Batteries, cells & fuel cells | H01M 8 · Batteries, cells & fuel cells | C04B 35 · Ceramics, cement & refractories | B01J 23 · Chemical/physical processes & catalysis | C01G 53 · Compounds of other metals |
|---|---|---|---|---|---|
| Ceres Intellectual Property Company Limited | Strong · 49 | Strong · 39 | Absent | Absent | Emerging · 4 |
| Technical University of Denmark (DTU) | Strong · 37 | Strong · 38 | Absent | Absent | Absent |
| The Trustees of the University of Pennsylvania | Strong · 36 | Strong · 35 | Absent | Absent | Absent |
| Saint-Gobain Ceramics & Plastics Inc | Strong · 30 | Strong · 29 | Absent | Absent | Emerging · 4 |
| NGK Insulators Ltd | Strong · 20 | Strong · 18 | Strong · 14 | Strong · 11 | Absent |
| Ion America Corp | Strong · 17 | Strong · 17 | Strong · 17 | Absent | Absent |
| University of Maryland | Strong · 25 | Strong · 23 | Absent | Absent | Absent |
Frequently asked questions
The corpus covers 345 patent families. This total is the basis for trend and composition analysis, while applicant rankings are measured at the patent-record level.
Ceres Intellectual Property Company Limited leads with 53 patent records, ahead of Danmarks Tekniske Univ (Technical University of Denmark) at 40 and The Trustees of the University of Pennsylvania at 36.
The evidence classifies the field as in decline, with annual filings easing back from a peak in 2017. The most recent 18–24 months are subject to publication lag and should not be read as confirmed continued decline.
The United States leads with 266 patent records, followed by China at 211 and Europe (EPO) at 164. WIPO (PCT) at 62 and Canada at 40 round out the top five jurisdictions.
H01M (batteries, cells and fuel cells) is overwhelmingly dominant. C04B (ceramics, cement and refractories) and C01G (compounds of other metals) are the next most active branches, reflecting the ceramic oxide and perovskite chemistry central to SOFC electrodes.
The evidence identifies one active co-applicant pair: the University of Maryland and Redox Power Systems LLC, with three co-filed patent records. The broader collaboration network appears sparse, with most players filing independently.
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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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