Asymmetric Supercapacitor Patents: Leaders, Trends & White Space 2026
- Small, recent field. only 17 published families sit inside this search, and the count did not exceed single digits per year until 2025.
- No dominant assignee. the strongest co-filing pairs involve individual academic inventors, not corporate labs — this is still an open, fragmented space.
- Mass-balancing claims are the exception, not the rule. most cited records claim electrode materials (MnO2 ink, COFs, metal selenides), leaving cell-level balancing methods comparatively unclaimed.
What this landscape covers
This review tracks patent families that combine asymmetric, hybrid, or asymmetric-capacitor cell architectures with explicit cell design optimization, mass balancing, or electrode design optimization claim language. That is a narrow intersection: most supercapacitor filings claim a material or a device without addressing how positive and negative electrode masses are balanced against each other, so the corpus here is small by design.
Seventeen published families is not a mature field measured by filing volume. It is closer to an active research frontier where mass-balancing methodology is still being worked out in academic labs and has not yet been consolidated by a handful of large filers.
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Filing trend and technology composition
Volume has stayed low and uneven across the window, with technology composition concentrated in capacitor-specific IPC codes but reaching into inorganic chemistry and nanotechnology classes.
Filings rose late, not steadily
The series opens at 3 families in 2017, drops through a flat mid-period with just 1 family in 2022, and then rises sharply to a peak of 8 in 2025 before the partial, understated 2026 count. Publication lag of roughly 18 months means the 2025-2026 figures will keep climbing as more families publish; the shape of a sudden late peak, rather than steady growth, distinguishes this from a maturing field.
H01G dominates, but the tail is chemistry-heavy
H01G (capacitors) covers 15 of 17 records, confirming that filers are anchoring claims in capacitor structure even when the underlying novelty is material-related. The remaining classes — compounds of other metals, nanotechnology, heterocyclic compounds, EV propulsion and control, and rare-earth compounds — appear once or twice each, showing that electrode chemistry and vehicle-integration angles are present but not yet claimed as a distinct sub-cluster.
Shares are the percentage of the 17 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Asymmetric Supercapacitor Design Optimization with Eureka
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Try EurekaThe records shaping this space
Neodymium-based MOF synthesis for a hybrid supercapacitor system
The filing describes a wet-chemistry route to neodymium-based metal-organic frameworks (Nd-PTA-MOF): dissolving neodymium nitrate hexahydrate and pyridine-2,4,6-tricarboxylic acid in separate aqueous solutions, combining them under heated stirring, adding ammonia, refluxing at 120-150°C, then crystallizing over seven days to yield a purple Nd-PTA-MOF product for use in a hybrid supercapacitor system.Filed by Central Labs, King Khalid University, July 2025 — illustrates how recent activity in this space still centers on novel electrode material synthesis rather than cell-level balancing methodology.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20170309411A1 | Method for preparing aqueous mno2 ink and capacitive energy storage devices comprising mno2 | 19 |
| 2 | WO2021245559A1 | Conductive two-dimensional (2D) covalent organic frameworks (COFS) and method of making an electrode material | 13 |
| 3 | US20230197361A1 | Conductive two-dimensional (2D) covalent organic frameworks (COFS) and method of making an electrode material | 11 |
| 4 | US11600453B1 | All transition metal selenide composed high-energy solid-state hybrid supercapacitor | 7 |
| 5 | US20250239419A1 | One-step synthesis of barium oxide-cerium oxide thin film electrodes for high-performance asymmetric supercap… | 1 |
| 6 | US20250232925A1 | Process for synthesizing neodymium-based metal-organic frameworks (nd-PTA-MOF) and a hybrid supercapacitor sy… | 1 |
Citation counts favour older publications within the corpus; treat them as a measure of influence on later filings, not as a signal of current commercial relevance.
Publication numbers are shown where the record carries one (6 of 6 rows); 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 stand out once the family count, IPC spread and citation table are read together.
Activity is recent and still accelerating
The jump from a flat mid-period (1 family in 2022) to 8 in 2025 signals the field only recently attracted enough research interest to generate filings at this rate. Given the 18-month publication lag, 2025-2026 totals will rise further as pending applications publish.
Capacitor structure claims dominate the corpus
Nearly every family is classified under H01G, meaning novelty is being expressed through capacitor/cell claims even where the underlying contribution is a new electrode compound. Chemistry-class filings (C01G, B82Y, C07D) are thin and scattered rather than forming their own cluster.
Early material-synthesis patents anchor later filings
The most-cited record, on aqueous MnO2 ink for capacitive storage, and two COF-electrode filings account for the bulk of citation weight in this corpus. That concentration suggests later filers are building on a small set of foundational electrode-material disclosures rather than a broad base of prior art.
No corporate consolidation yet
The strongest co-filing links in the dataset are between individual academic researchers, not between corporate R&D units. Recent-year momentum is similarly spread across single-digit counts per assignee, with several organisations showing a full drop to zero in the latest year.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to asymmetric supercapacitor design optimization, with the prior art for and against each one.
Who is filing, and where the momentum sits
No single organisation controls this space. Momentum data shows individual academic inventors and a handful of institutions filing in small numbers, with several dropping to zero in the most recent year.
Academic inventors lead recent activity
Prof Marko Huttula and Dr Harishchandra Singh each show 1 filing in the latest year, matching the pattern of individually-led academic filings rather than corporate programs across this dataset.
Some institutional filers have gone quiet
Council of Scientific and Industrial Research and Western Norway Innovation both show a full year-on-year drop to zero filings in the latest year, after prior activity — a signal that early institutional interest has not translated into sustained programs.
US and India lead receiving offices, WIPO close behind
United States receives the largest share of filings (9), with India (4) and WIPO/PCT (4) close behind. That split suggests filers are seeking early US protection while keeping international options open via PCT rather than committing broadly across national offices yet.
| Assignee | Recent year | YoY |
|---|---|---|
| PROF MARKO HUTTULA | 1 | — |
| DR HARISHCHANDRA SINGH | 1 | — |
| The Hong Kong Polytechnic University | 0 | — |
| King Abdullah University of Science and Technology (KAUST) | 0 | — |
| Council of Scientific and Industrial Research (CSIR) | 0 | -100% |
| Western Norway Innovation AS | 0 | -100% |
| PRINCESS NORA BINT ABDULRAHMAN UNIV | 0 | -100% |
| University of Sharjah | 0 | — |
Where to take this analysis
The trend and citation data point to a field still forming its claim structure. Two directions follow naturally from that.
Model the mass-balancing claim gap directly
Cell-level mass-balancing methodology is under-represented relative to electrode-material claims in this corpus; a deeper claim-by-claim review of the H01G-classified families would clarify how much of that gap is real versus an artifact of search terms.
Explore claim structures in EurekaTrack the 2025-2026 publication wave as it lands
With the field's only real volume spike sitting in the last two years and publication lag still working through the pipeline, re-running this search in six to twelve months will materially change the assignee ranking and IPC spread.
Set up monitoring in EurekaCommon questions on this landscape
This search identifies 17 published patent families combining asymmetric, hybrid or asymmetric-capacitor architecture terms with cell design optimization, mass balancing or electrode design optimization language, covering 2015 through the July 2026 data cut-off. That is a small corpus by patent-landscape standards, reflecting how narrow the mass-balancing claim intersection is compared to the much larger body of general supercapacitor material patents. Because publication lags filing by roughly 18 months, the 2025 and 2026 counts will rise as more pending applications publish.
No single company or institution dominates this dataset. The strongest co-filing relationships are between individual academic researchers rather than corporate R&D teams, and recent-year momentum is spread thinly across several organisations, some of which show a full drop to zero filings in the latest year. This points to a field still driven by individual academic labs rather than one consolidated by large filers.
Mass balancing refers to sizing the positive and negative electrode masses in an asymmetric or hybrid supercapacitor cell to match their different charge-storage mechanisms, which affects energy density, voltage window and cycle life. In this dataset, most filings claim novelty through electrode materials or capacitor structure (classified under H01G) rather than through mass-balancing methodology itself, which appears comparatively under-claimed as a distinct method claim.
US20250232925A1, filed by Central Labs at King Khalid University, claims a synthesis process for neodymium-based metal-organic frameworks (Nd-PTA-MOF) for use in a hybrid supercapacitor system, specifying reagent quantities, reflux temperature range and a multi-day crystallization step. It blocks the specific synthesis route and resulting material composition as claimed, but does not appear to claim cell-level mass-balancing methodology, leaving that adjacent territory open. Anyone working with rare-earth MOF electrodes should review its claim scope closely before replicating the described synthesis conditions.
The IPC composition shows heavy concentration in H01G capacitor claims with only one or two families each in adjacent classes such as EV propulsion integration, rare-earth compounds and heterocyclic compounds, suggesting these branches are touched but not yet claimed as distinct sub-clusters. Cell-level mass-balancing methodology, as opposed to specific electrode material synthesis, also appears comparatively open based on the citation and claim pattern in this corpus. A first claim in either area would face a thinner prior-art base than a general electrode-material filing would.
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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.