Solid-State Supercapacitor Electrolyte Patents: Leaders & Trends 2026
- Filing peaked in 2018 at 24 families and has not come close to that level since — the 2022 midpoint sits at just 3, pointing to a technology that consolidated early rather than one still accelerating.
- H01G capacitor claims dominate at 77 records against 40 in H01M battery-adjacent filings, showing most applicants are drafting around capacitor architecture even when the electrolyte chemistry overlaps with battery work.
- The United States leads receiving offices at 35 with China at 22 and India a close third at 14 — filing strategy here is split across jurisdictions rather than concentrated in one venue.
What this landscape covers
This landscape tracks patent families combining solid-state, all-solid-state or gel polymer/ionogel electrolyte claims with supercapacitor device architectures, filed between 2015 and the 2026 data cut-off. The search string pairs device-level terms with electrolyte-format terms, so it captures both dedicated solid-state supercapacitor filings and adjacent gel-electrolyte work that names a capacitor use case.
Publication typically lags filing by around 18 months, so the most recent filing year in this dataset is undercounted and should be read as a floor, not a ceiling. The 110 families in the ranking are the fairer unit for comparing applicants, since they collapse continuations and multi-jurisdiction refiling of the same invention.
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Filing trend and technology composition
Two views of the same 110 families: how filing volume has moved year over year, and which IPC subclasses the claims actually sit in.
A 2018 peak that was not repeated
Filings rose from 4 in 2017 to a peak of 24 in 2018, then fell back sharply. By the 2022 midpoint, annual filings were down to 3 — flat-to-declining rather than a technology still building momentum. Readers should treat the final one or two years as partial given publication lag.
Capacitor claims outnumber battery-adjacent ones nearly two to one
H01G (capacitors) accounts for 77 of the records against H01M (batteries, cells and fuel cells) at 40, with C01B (inorganic compounds, likely electrolyte salts and inorganic solid conductors) at 20. Smaller counts in C08F/C08G polymer chemistry, B82Y nanotechnology, H01L semiconductor devices and H02J power systems suggest the electrolyte innovation itself is thinner than the device-level claiming around it.
Shares are the percentage of the 110 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Solid-State Supercapacitor Electrolyte with Eureka
This page is one run against one query. Ask Eureka your own question about solid-state supercapacitor electrolyte and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
Gel polymer electrolyte for a high-performance all-solid-state supercapacitor (WO2022183606A1)
Filed by Qilu University of Technology, this family claims a flame-retardant gel polymer electrolyte built from LiTFSI ionically dispersed in a polymer grafted with a DOPO flame-retardant active P-H bond. The electrolyte is reported at 4 mS/cm ionic conductivity at 20°C, with mechanical strength tunable up to roughly 28 kPa maximum stress and 305% maximum strain, and device operation claimed across -20°C to 60°C.Abstract translated and condensed from the original filing; see the linked record for full claim language.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20170062821A1 | Laser induced graphene materials and their use in electronic devices | 97 |
| 2 | US20140322608A1 | Modified graphitic electrodes for electrochemical energy storage enhancement | 55 |
| 3 | WO2015175060A2 | Laser induced graphene materials and their use in electronic devices | 48 |
| 4 | US20160055983A1 | All-solid-state-supercapacitor and a process for the fabrication thereof | 40 |
| 5 | US20180290891A1 | Reduced graphene oxide-metal oxynitride aerogel electrodes | 37 |
| 6 | US20190051936A1 | Solid-state thin film hybrid electrochemical cell | 28 |
| 7 | US20210111426A1 | Solid-state electrolytes and methods for making the same | 26 |
| 8 | CN105551827A | 结合丝网印刷的层层组装柔性全固态超级电容器的制备方法 | 21 |
| 9 | US20200036070A1 | Capacitor-assisted solid-state battery | 19 |
| 10 | US10319537B2 | Modified graphitic electrodes for electrochemical energy storage enhancement | 19 |
Citation counts favour older records simply by virtue of being searchable longer; treat this as a signal of historical influence on the field, not of which claims matter most today.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns worth acting on before drafting or licensing in this space.
The rush already happened
The bulk of activity clustered around 2018. A company entering now is filing into a field where the dominant architectures were staked out years ago, not one where the claim space is still forming.
Capacitor framing still wins
Nearly twice as many records sit in H01G as in H01M, meaning most applicants are claiming these electrolytes inside capacitor device structures rather than as a shared battery-capacitor chemistry.
Collaboration is the exception, not the norm
The strongest co-assignee pairing in the dataset appears on only 8 shared families, well below what would indicate a formal, sustained joint-filing programme. Most activity here is single-assignee.
No single venue dominates filing strategy
The United States leads but not by an overwhelming margin over China, and India's 14 filings put it ahead of WIPO PCT routes and Europe — a sign that applicants are filing locally rather than centralising through one gateway.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to solid-state supercapacitor electrolyte, with the prior art for and against each one.
Who holds ground, and where the gate is open
No assignee in this dataset shows recent-year filing momentum — every name with a strong historical position, including the leading co-filers, registered zero families in the latest tracked year. That is consistent with a field that peaked in 2018 and has not seen a new wave of concentrated activity since.
Institutions built the early base
University and research-institute assignees appear repeatedly among the more active filers, consistent with early-stage materials work being claimed before commercial device makers moved in.
A small number of individual-inventor filers are notably active
Named-individual assignees rather than corporations hold the strongest co-filing relationship in the set, suggesting some of the most persistent activity here runs through academic labs rather than corporate R&D groups.
Automotive OEM interest is present but thin
A single global automotive technology arm appears in the assignee set, indicating supercapacitor electrolyte work is on the radar for vehicle applications but has not yet produced a dense automotive filing cluster.
| Assignee | Recent year | YoY |
|---|---|---|
| William Marsh Rice University | 0 | — |
| Sinnika Ltd. | 0 | — |
| QIU FULIAN | 0 | — |
| QI SUXIA | 0 | — |
| Council of Scientific and Industrial Research | 0 | — |
| GM Global Technology Operations LLC | 0 | — |
| Qilu University of Technology (Shandong Academy of Sciences) | 0 | — |
| Oxford University Innovation Ltd. | 0 | — |
Where to take this analysis
The dataset points to specific next questions rather than a single conclusion.
Check whether the 2018 peak was a single-technology event
Drill into which specific electrolyte chemistry drove the 2018 spike to see whether it was one dominant approach or several unrelated filings landing in the same year.
Explore filing trends in EurekaMap the under-claimed branches against active R&D
Cross-reference the thin IPC branches — C08F/C08G polymer chemistry, B82Y nanotechnology — against current published research to see if claim activity is about to catch up.
Run a white space search in EurekaWatch for renewed automotive filing
With only one major automotive assignee currently present, a second OEM entering this space would be a meaningful signal worth monitoring.
Track assignee activity in EurekaCommon questions about this landscape
A solid-state supercapacitor electrolyte replaces the liquid or aqueous ionic solution normally used to carry charge between electrodes with a solid or gel-like ion conductor, such as a gel polymer or ionogel. This removes the risk of leakage and, in many formulations, improves flammability resistance, which matters for wearable and flexible electronics. The tradeoff historically has been lower ionic conductivity than liquid electrolytes, which is why much of the patented work in this dataset focuses on additives and polymer grafting aimed at closing that gap while keeping the device flame-retardant and mechanically flexible.
The dataset shows activity concentrated among university and research-institute assignees rather than a single dominant corporate player, with the strongest co-filing relationship being between two named individual inventors rather than a company research group. A global automotive technology arm is present but represents a thin slice of the total filings. This pattern suggests the field is still largely academic-institution-led rather than commercially consolidated, which is relevant if you are assessing freedom to operate versus licensing risk.
The filing trend in this dataset rises from 4 families in 2017 to a peak of 24 in 2018, then falls back substantially, with the 2022 midpoint at just 3. This pattern is more consistent with an early wave of foundational claiming that occupied the core chemistry space, after which new entrants faced a denser prior art landscape and filed less. It does not necessarily mean commercial interest disappeared; publication lag means the final one to two years in any dataset like this are always undercounted, so recent activity may be understated.
Relative to the dense capacitor-architecture claims in H01G, branches like flame-retardant additive chemistry, wide-temperature-range formulations, and flexible or printable solid electrolyte substrates show much thinner patent density in this dataset. Hybrid battery-capacitor electrolyte chemistry, sitting between the H01G and H01M subclasses, is also under-claimed relative to either subclass alone. These are the areas where a well-drafted first claim is less likely to run straight into blocking prior art.
Not necessarily. High filing density in a subclass like H01G means that particular claim space is occupied by existing patents, not that the underlying technology has reached commercial maturity or that further improvement is impossible. It is entirely possible for a heavily filed architecture to still have significant performance gaps, such as the conductivity and temperature-range tradeoffs referenced in several of the most-cited records here. Filing volume is a proxy for claim crowding, and should be read alongside citation influence and recent-year momentum before drawing conclusions about technology readiness.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.