Hybrid Supercapacitor Current Collector Patent Landscape 2026
- 87 families, one dominant structure. the most-cited records all trace back to three-dimensional porous aluminum current collectors from Sumitomo Electric and its co-filer.
- Filing peaked in 2017, not now. activity had fallen to zero by the 2022 midpoint, and the top assignees show no filings in the latest tracked year.
- Adjacent process claims are thin. electroplating, press-forming, connector and grid-integration subclasses each carry only three to four families against 87 in the capacitor core.
What this landscape covers
This landscape tracks patent families claiming current collector structures, coatings and manufacturing methods specifically for hybrid supercapacitors, asymmetric supercapacitors and lithium-ion capacitors, built around IPC classes H01G11/68 and H01G11/70. It captures 87 patent families published between 2015 and the 2026 data cut-off, drawn from filings that name current collector, collector coating, etched foil or corrosion-resistant collector concepts directly in their title or claims.
The core claim territory is narrow and structurally specific: nearly two-thirds of the records also carry a battery IPC code, and the citation rankings are dominated by one recurring structural concept — the three-dimensional porous aluminum current collector — rather than by a broad spread of competing designs.
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Filing trend and technology mix
Eighty-seven patent families make up this landscape, filed against a search built around hybrid, asymmetric and lithium-ion capacitor current collectors under IPC classes H01G11/68 and H01G11/70. The trend and technology tables below show where the filing activity actually sits, not where the topic is discussed in marketing terms.
Filings peaked in 2017, then went flat
Filing activity climbed to a peak of 6 families in 2017 and had fallen to zero by the 2022 midpoint. Because publication lags filing by roughly 18 months, the last one to two years in this chart will always look thinner than they eventually turn out to be — but the flat-to-declining shape from 2017 onward predates that lag effect and reflects a genuine slowdown in new filing.
Collector claims sit inside a capacitor–battery overlap
Every record in this set carries an H01G capacitor classification, and 61 of the 87 also carry an H01M battery classification — this is a field defined by shared electrode architecture between capacitors and batteries, not a capacitor-only niche. The remaining subclasses (B32B laminates, C25D electroplating, B30B presses, H01B conductors, H01R connectors, H02J power systems) each carry single-digit counts, marking them as thinly claimed adjacent branches rather than core territory.
Shares are the percentage of the 87 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Hybrid Supercapacitor Current Collector with Eureka
This page is one run against one query. Ask Eureka your own question about hybrid supercapacitor current collector and every answer comes back with the patent numbers behind it.
Try EurekaKey patents to review first
Three-dimensional network aluminum porous body for current collector, current collector using the aluminum porous body, electrode using the current collector, and nonaqueous electrolyte battery, capacitor and lithium-ion capacitor, each using the electrode
It is an object of the present invention to provide a sheet-shaped three-dimensional network aluminum porous body which is suitably used as current collector base materials of an electrode for a nonaqueous electrolyte battery and an electrode for a capacitor using a nonaqueous electrolytic solution, and an electrode, a capacitor and a lithium-ion capacitor, each using the sheet-shaped three-dimensional network aluminum porous body. For this object, the three-dimensional network aluminum porous body for a current collector of the present invention is a sheet-shaped three-dimensional network aluminum porous body, and a skeleton forming the aluminum porous body has a surface roughness (Ra) of 3…Filed by Sumitomo Electric Industries, published 2013-01-03. Abstract truncated as provided in the source record.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20130004844A1 | Three-dimensional network aluminum porous body, electrode using the aluminum porous body, and nonaqueous elec… | 57 |
| 2 | CN104409224A | 一种锂离子电容器用负极片及其制备方法 | 38 |
| 3 | US20130004856A1 | Three-dimensional network aluminum porous body for current collector, current collector using the aluminum po… | 25 |
| 4 | US20080055819A1 | Lithium-ion capacitor | 25 |
| 5 | US20120288758A1 | Three-dimensional network aluminum porous body for current collector, electrode using the aluminum porous bod… | 18 |
| 6 | CN105845459A | 一种锂离子电容器集流体用多孔铜箔的制备方法 | 16 |
| 7 | US20160071658A1 | Electrochemical supercapacitor device made from an electrolyte comprising, as a conductive salt, at least one… | 16 |
| 8 | US20190180949A1 | supercapacitor | 14 |
| 9 | US20120288757A1 | Three-dimensional network aluminum porous body for current collector, electrode using the aluminum porous bod… | 14 |
| 10 | US20120315540A1 | Three-dimensional network aluminum porous body for current collector, electrode using the aluminum porous bod… | 14 |
Ranked by citation count within the searched corpus; older porous-aluminum filings dominate because citation counts favour records with more time on file, not necessarily current commercial relevance.
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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The numbers point to a technology area with one deeply entrenched structural claim and comparatively little activity everywhere else. That combination changes where a new filer should look for both risk and room.
One structural family sets the reference point
Four of the five most-cited records in this corpus describe variants of the same three-dimensional porous aluminum current collector, credited to Sumitomo Electric. That level of concentration means most later filers in this space have had to draft around this specific structure rather than around a broad, undefined category of collector.
The filing wave has already passed its peak
Filings rose to a peak of 6 in 2017 and had dropped to zero by 2022, with the top assignees — Sumitomo Electric, Toyama Sumitomo Electric and others — showing zero filings in the latest tracked year. Recent years are understated by the usual publication lag, but the multi-year decline predates that effect.
Capacitor collectors borrow heavily from battery electrode design
Seventy percent of the records carry a battery classification alongside the capacitor one, confirming that collector innovation here is shared engineering between lithium-ion capacitors and lithium-ion battery electrodes rather than a capacitor-only discipline.
Claim risk is concentrated in the US and South Korea
The United States (39) and South Korea (15) together account for well over half of all tracked filings, ahead of the EPO (12) and China (11). A freedom-to-operate review that skips either of the two leading offices misses most of the enforceable claim density in this field.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hybrid supercapacitor current collector, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Sumitomo Electric Industries, Ltd. | Toyama Sumitomo Electric Co., Ltd. | 32 |
| SAKAIDA HIDEAKI | OTA HAJIME | 5 |
| SAKAIDA HIDEAKI | OKUNO KAZUKI | 5 |
| SAKAIDA HIDEAKI | NISHIMURA JUNICHI | 5 |
| SAKAIDA HIDEAKI | KIMURA KOUTAROU | 5 |
| SAKAIDA HIDEAKI | HOSOE AKIHISA | 5 |
| SAKAIDA HIDEAKI | GOTO KENGO | 5 |
| OTA HAJIME | OKUNO KAZUKI | 5 |
Only 10 co-assignee pairs appear in the dataset, and the strongest by far links Sumitomo Electric Industries with Toyama Sumitomo Electric across 32 shared families — an order of magnitude ahead of the next pairs, both individual-inventor combinations at 5 each. That gap indicates one tight corporate collaboration driving the core claim set, with everything else in the dataset filed far more independently.
Assignee landscape and where the gaps sit
The assignee base is small and top-heavy: one corporate pairing accounts for the deepest co-filing link in the dataset, and none of the leading assignees have filed in the most recent tracked year. That combination points to a claim space that was built out deliberately, then largely left in place.
One collaboration built the core claim set
Sumitomo Electric Industries and Toyama Sumitomo Electric co-file together 32 times, by far the strongest link among the 10 co-assignee pairs in this dataset. Their filings anchor the most-cited porous-aluminum current collector structures that later applicants have had to draft around.
No leading assignee is currently active
Sumitomo Electric, Toyama Sumitomo Electric, Subaru, Saft, UACJ and the French atomic energy commission (CEA) all show zero filings in the latest tracked year. That is a signal worth weighing against the publication lag, but the multi-year decline in the trend data supports a genuine pause rather than a reporting artefact.
US and South Korea carry most of the claim density
Well over half of the 87 tracked families were filed through the US or South Korean offices, ahead of the EPO, China, PCT and Canada combined. Clearing freedom-to-operate in those two jurisdictions covers most of the field's existing claim risk.
| Assignee | Recent year | YoY |
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 0 | — |
| Toyama Sumitomo Electric Co., Ltd. | 0 | — |
| Subaru Corporation | 0 | — |
| Saft Groupe S.A. | 0 | — |
| UACJ Corporation | 0 | — |
| French Alternative Energies and Atomic Energy Commission (CEA) | 0 | — |
| SAKAIDA HIDEAKI | 0 | — |
| OTA HAJIME | 0 | — |
Where to take this landscape next
The dataset points to a small number of concrete next questions rather than a general call to keep monitoring the field.
Map the porous-aluminum claim family in full
Read the four related Sumitomo Electric filings together, not just the single most-cited record, to see the actual boundary of the structural claim before drafting around it.
Open the claim mapTest a process-level claim in the thin subclasses
Electroplating, press-forming and connector hardware each carry only a handful of families — draft a candidate claim there and check it against the existing prior art directly.
Run a novelty checkWatch for renewed filing activity
With every leading assignee at zero in the latest tracked year, a resumption of filing by Sumitomo Electric or a new entrant would be the clearest signal that this claim space is reopening.
Set up monitoringFrequently asked questions
In this dataset it is any current-collector structure or coating claimed for use in a hybrid supercapacitor, asymmetric supercapacitor or lithium-ion capacitor, classified under IPC H01G11/68 or H01G11/70. That includes porous metal bodies, etched foils, corrosion-resistant coatings and the electroplating or lamination processes used to make them. The classification is defined by function — collecting and distributing current in the capacitor electrode — rather than by a single material, so both aluminum and non-aluminum approaches appear in the same search.
The most-cited records in this corpus, several carrying citation counts in the double digits and one reaching 57, all describe three-dimensional network aluminum porous bodies used as current collector base materials, largely from Sumitomo Electric and related filings. High citation counts inside a searched patent corpus tend to favour older, foundational records simply because later filers have had more time to cite them, so this reflects influence on subsequent drafting rather than a claim that the approach is currently the most active area of filing.
Based on the tracked filings, activity peaked at 6 families in 2017 and had dropped to zero by the 2022 midpoint, which points to a flat-to-declining filing trend rather than growth. Readers should treat the very latest one to two years with caution because publication typically lags actual filing by around 18 months, understating recent activity. Taken together, the pattern looks like a technology area that saw a defined filing wave rather than sustained, compounding investment.
The core three-dimensional porous-aluminum structure is densely claimed and heavily cross-cited, but adjacent process-level branches are thin: electroplating and electroforming methods (C25D, 4 records), press-forming steps (B30B, 3), connector hardware (H01R, 3) and grid-integration aspects (H02J, 3) each carry only a handful of families. A claim built around a specific corrosion-resistant plating process or a distinct forming method, rather than the porous base material itself, has meaningfully less prior art to clear.
The United States leads with 39 records, followed by South Korea at 15, the European Patent Office at 12, China at 11, WIPO/PCT filings at 4 and Canada at 2. That distribution means most of the enforceable claim density — and most of the prior art a new filer needs to search against — sits in the US and South Korean systems, with China and the EPO as secondary but still material jurisdictions to clear before filing or launching a product there.
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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.