Solid-State Battery Separator Patent Landscape 2026
Solid-State Battery Separator Patent Landscape in 2026
The solid-state battery separator patent space is a nascent, highly concentrated field with 13 patent families in scope, where Arkema France holds nearly half of all recorded families. Activity is in a growth stage on a multi-year basis, though annual volume has eased from its 2023 peak and the most recent filing years remain understated by publication lag.
Arkema France dominates a small, concentrated field
Arkema France SA leads
The top five filers account for 86% of the combined total among the hundred largest filers, signaling an exceptionally tight concentration with a steep drop-off after the top three. The remaining applicants — the University of Picardie Jules Verne, CNRS, Johnson IP Holding, and a U. S. government entity — each hold a single family.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Arkema France SA | 6 | |
| 2 | A123 Systems LLC | 2 | |
| 3 | ZNL Energy AS | 2 | |
| 4 | University of Picardie Jules Verne | 1 | |
| 5 | French National Centre for Scientific Research (CNRS) | 1 | |
| 6 | Johnson IP Holding LLC | 1 | |
| 7 | NASA (U.S. National Aeronautics and Space Administration) | 1 |
Arkema France’s lead, combined with its status as a new entrant whose recent filings account for the bulk of its portfolio, suggests that the dominant position was established quickly and could be challenged before the field matures.
The most recent filing years (2024–2026) are likely undercounted due to standard patent publication lag of 18–24 months; the true scale of current activity is higher than the trend data reflects. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
600% multi-year growth; all activity concentrated in a single IPC class
The filing trend and technology composition charts together reveal a field that has grown sharply in the recent three-year window relative to the prior three-year window, while remaining entirely focused within a single high-level technology classification.
Annual filing trend
Zero activity from 2017 through 2019 gives way to isolated filings in 2020 and 2022, followed by a step-change in 2023 with 4 families and 5 families attributed to 2025. The 2023 year represents the visible peak; 2024 and 2025 figures are suppressed by publication lag and should not be read as a slowdown. The recent-to-prior three-year growth rate is 600%.
↗ Hover for values · click a bar to ask EurekaTechnology composition
All 13 patent families fall within H01M (Batteries, cells & fuel cells), with no filings detected in adjacent IPC branches such as materials science, polymer chemistry, or manufacturing process classes. This single-branch concentration reflects the early, application-focused nature of the field.
↗ 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.
Solid electrolyte for an all-solid-state battery
The present invention relates generally to the field of the storage of electrical energy in all-solid-state batteries, in particular in storage batteries of Li-ion type. More specifically, the invention relates to a solid electrolyte consisting of a polymer matrix and of a fibrous reinforcement which makes possible the manufacture of a non-porous film… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Solid electrolyte for an all-solid-state battery | 1 |
| 2 | Solid electrolyte | 1 |
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 structure means for R&D investment decisions
The field’s small size, rapid recent growth, and tight concentration around a single materials specialist create both entry windows and risks that R&D planners should weigh carefully.
Growth stage, eased from 2023 peak
The field is classified as Growth: the recent three-year filing window sits well above the prior three-year window, delivering 600% growth on that basis. However, annual volume has eased from its 2023 peak, and the 2024–2025 figures are further suppressed by publication lag. The field is expanding on a multi-year basis but is not yet in a steady high-volume phase, making it an early-growth window for new entrants.
Growth stageSingle leader, thin challenger tier
Arkema France holds 6 of 13 patent families, and the top five filers account for 86% of the hundred largest filers’ combined total. The challenger tier — A123 Systems and ZNL Energy at 2 families each — is thin, and four applicants hold only 1 family each. This structure means a single new entrant with 3–4 targeted filings could immediately rank among the top three players.
High concentrationOne observed academic co-filing pair
The only recorded co-applicant collaboration links the University of Picardie Jules Verne and the French National Centre for Scientific Research (CNRS) on 1 shared family. No industrial co-filing or cross-sector alliances are evident in the data. This suggests the ecosystem is largely siloed, with commercial players filing independently — an opening for partnerships that could accelerate development.
Limited collaborationU.S. leads; PCT and India signal international intent
The United States is the lead filing office with 6 patent records, followed by India with 3 and WIPO (PCT) with 3, and a single record in Taiwan. PCT filings indicate that at least some applicants are pursuing broad international protection. India’s presence is notable for a field of this size and may reflect manufacturing or market strategy considerations by the filers.
U.S.-led, PCT reachGo 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 Picardie Jules Verne | French National Centre for Scientific Research (CNRS) | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Arkema France leads; all tracked active filers are new entrants
Every applicant with measurable recent momentum entered the field in the most recent filing window, confirming that the competitive structure is still being established. Arkema France has moved decisively to build the largest position.
Arkema France SA
Arkema France SA holds 6 patent families — the largest position in the field by a wide margin — concentrated across H01M 10 (batteries and cells) with 6 filings and H01M 50 (battery structural components) with 4 filings. Its momentum trend is flagged as a new entrant, meaning its entire portfolio was built in the recent window, reflecting a deliberate and rapid stake-building strategy in solid-state separator materials.
families: 6A123 Systems LLC
A123 Systems LLC holds 2 patent families, split across H01M 10 (2 filings) and H01M 50 (1 filing), indicating a balanced focus on cell chemistry and structural separator design. Like Arkema France, A123 Systems is recorded as a new entrant in the momentum data, placing its activity entirely within the recent growth window. Its smaller portfolio leaves room to build but also to be overtaken.
families: 2| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Arkema France SA | 5 | ▲ new entrant |
| NASA (U.S. National Aeronautics and Space Administration) | 1 | ▲ new entrant |
| University of Picardie Jules Verne | 1 | ▲ new entrant |
| French National Centre for Scientific Research (CNRS) | 1 | ▲ new entrant |
Under-served adjacent branches worth monitoring
All 13 patent families in scope fall within the H01M class, leaving adjacent technical branches with no recorded coverage in this dataset. Two areas stand out as potentially under-served based on their technical relationship to solid-state separators.
Polymer and materials chemistry (IPC C08)
Solid-state separators rely heavily on polymer electrolyte materials and ceramic composites, yet no families in this dataset are classified under C08 (organic macromolecular compounds) or C04 (ceramics). This gap may reflect narrow claim drafting rather than absence of innovation, but it represents a potential filing strategy for applicants seeking to protect upstream material compositions independently of battery-system claims. The technical value is clear given Arkema France’s materials-science background.
Search this in Eureka →Manufacturing and processing methods (IPC B29 / B32)
Separator fabrication processes — thin-film deposition, lamination, and extrusion — are standard routes to differentiation in conventional separator technology but appear absent from this dataset’s IPC coverage. Filing in B29 (plastics processing) or B32 (layered products) could provide process-level protection that complements existing battery-system patents. Entry via process claims may offer a lower-conflict path for new applicants, though commercial opportunity depends on whether the processing steps are novel relative to the broader separator art.
Search this in Eureka →How leaders differ by technology sub-class
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells |
|---|---|---|---|
| Arkema France SA | Strong · 6 | Strong · 4 | Absent |
| A123 Systems LLC | Strong · 2 | Moderate · 1 | Absent |
| Johnson IP Holding LLC | Strong · 1 | Strong · 1 | Strong · 1 |
| ZNL Energy AS | Absent | Strong · 2 | Absent |
| French National Centre for Scientific Research (CNRS) | Strong · 1 | Absent | Absent |
| University of Picardie Jules Verne | Strong · 1 | Absent | Absent |
| NASA (U.S. National Aeronautics and Space Administration) | Strong · 1 | Absent | Absent |
Frequently asked questions
The dataset contains 13 patent families in scope. This is a small corpus consistent with an early-growth field that only began accumulating filings from 2020 onward.
Arkema France SA leads with 6 patent families, accounting for the largest single share of the field. A123 Systems LLC and ZNL Energy AS each hold 2 families, forming a thin challenger tier.
The recent three-year filing window is 600% above the prior three-year window, placing the field firmly in a growth stage on a multi-year basis. Annual volume peaked visibly in 2023, and the 2024–2025 figures are likely understated due to publication lag.
The United States leads with 6 patent records, followed by India and WIPO (PCT) with 3 each, and Taiwan with 1. PCT filings indicate some applicants are pursuing broad international coverage.
Only one co-applicant collaboration is recorded: between the University of Picardie Jules Verne and the French National Centre for Scientific Research (CNRS) on a single shared family. Commercial applicants appear to file independently.
All 13 patent families are classified within H01M (batteries, cells, and fuel cells). No filings are recorded in adjacent classes such as polymer chemistry (C08), ceramics (C04), or manufacturing processes (B29, B32) within this dataset.
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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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