Hybrid Supercapacitor Current Collector Patents: Top Companies & Trends 2026
A data-backed look at hybrid supercapacitor current collector patents: filing trends, leading assignees, technology composition and white space, based on 71 records filed 2015-2026.
Filing growth = 2021 (1 records) → 2024 (1); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 71 records in scope (CR5), not the ranked leaders only.
What the hybrid supercapacitor current collector patent record shows
Hybrid supercapacitor current collector technology sits at the intersection of capacitor and battery electrode engineering: the current collector — the metal foil or structured substrate that carries charge to and from an active material — has to survive the different charge kinetics of a battery-type electrode paired with a capacitor-type electrode in the same cell. The 71 records in scope, filed between 2015 and the 2026 cut-off, cluster overwhelmingly under the capacitor classification H01G and the battery classification H01M, which together describe the hybrid nature of the claim space rather than a single well-defined subfield.
Filing offices skew toward the United States and China, with Europe, Japan, India and WIPO PCT filings trailing behind — a pattern consistent with a technology still being worked out at the lab and first-product stage rather than one with settled, globally enforced claims.
Filing trend, technology composition and where records are filed
The dataset spans 71 published records from 2015 through the 2026 data cut-off, tracked across receiving offices, IPC subclasses and a ranked list of 50 assignees.
Filing activity peaked in 2017 and has since flattened
Annual filings ran from 9 in 2017 — the peak so far — down to 1 in 2026 (a partial year). Because publication lags filing by roughly 18 months, the last one to two years understate true filing activity; the more reliable comparison is 2021 to 2024, where filings held flat at 1 each year, a 0% change.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
Two IPC subclasses dominate; the rest are marginal
H01G (capacitors) appears on 94.4% of the 71 records and H01M (batteries, cells & fuel cells) on 56.3%, confirming that nearly every filing in this set is explicitly framed as hybrid capacitor-battery technology. Every other subclass — C01B, C07D, C09K, C12N, H01L, B01J — sits at or below 4.2% of records, each representing a handful of filings rather than an established sub-branch.
Shares are the percentage of the 71 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaThe most-cited records and a representative recent filing
Zinc-ion hybrid supercapacitor device with layered black phosphorus cathode (IN202641027828A)
Filed by Vellore Institute of Technology and dated 2026-03-20, this record claims a zinc-ion hybrid supercapacitor with a cathode built from layered black phosphorus deposited on a current collector, paired with a zinc anode and a gel polymer electrolyte carrying zinc ions. The manufacturing method covers pretreating red phosphorus to strip surface oxygen, solvothermal conversion to the layered black phosphorus in ethylenediamine, and depositing that material onto the collector substrate.One of the most recent filings in the dataset, illustrating the current front of claim activity rather than the field's historical core.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6252762B1 | Rechargeable hybrid battery/supercapacitor system | 369 |
| 2 | US20150086881A1 | Large-grain graphene thin film current collector and secondary batteries containing same | 107 |
| 3 | US6517972B1 | High energy density hybrid battery/supercapacitor system | 97 |
| 4 | US20100195269A1 | Hybrid supercapacitor using surface-oxidized transition metal nitride aerogel | 57 |
| 5 | US20180053931A1 | Humic acid-bonded metal foil film current collector and battery and supercapacitor containing same | 33 |
| 6 | US20180040900A1 | Graphene oxide-bonded metal foil thin film current collector and battery and supercapacitor containing same | 31 |
| 7 | WO2000063929A1 | Rechargeable hybrid battery/surpercapacitor system | 25 |
| 8 | US20160365613A1 | Battery and supercapacitor hybrid | 18 |
| 9 | US20190180949A1 | supercapacitor | 14 |
| 10 | WO2018031064A1 | Graphene oxide-bonded metal foil thin film current collector | 12 |
Citation counts favour older records simply because they have had longer to accumulate citations inside the searched corpus; treat them as a signal of influence on the field's vocabulary, not of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three figures anchor how crowded — or open — different parts of this claim space actually are.
The top of the field is dense, but the tail is long
A single leader holds 10 records and the top 5 combined hold 35 of the 71 records in scope — just under half the field. The top 10 extend that to 46 records, or 64.8% of all records, which means over a third of the field is spread across 40 more ranked assignees each filing in small numbers. New entrants are not blocked outright; they are filing around a small set of well-defended positions.
Activity has plateaued since the 2017 peak
Filings peaked at 9 in 2017 and by the last fully comparable window, 2021 to 2024, had settled at a flat 1 filing per year with no growth. This does not mean the technology is exhausted — flat filing after an early peak is also consistent with the field consolidating around a smaller number of proven collector designs.
Claims are written as hybrid by design
Almost every record touches capacitor classification H01G, and more than half also touch battery classification H01M — the overlap itself is the technology. Peripheral subclasses like C01B, C07D and H01L each cover only a handful of records, marking chemistry- or material-specific side branches rather than mainstream claim territory.
Collaboration is limited and inventor-anchored
Only 7 co-assignee pairs appear across the dataset, and the strongest is tied to a single inventor pairing filing 4 times together. This points to a field where most assignees file independently rather than through joint ventures or shared research consortia.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hybrid supercapacitor current collector patent landscape, with the prior art for and against each one.
Where to take this analysis
The figures above establish where filing activity sits today. Turning that into a filing or freedom-to-operate decision means going deeper into specific claims and specific assignees.
Map the leader's claim boundaries
The top-ranked assignee's 10 records are worth reading claim-by-claim before drafting in adjacent territory, since a broad early claim can constrain collector geometry or material choice well beyond its literal wording.
Explore assignee claims in EurekaCheck the under-claimed IPC branches
Subclasses sitting below 5% of records — such as C01B, C07D and H01L — may reflect either genuine white space or simply that the searched terms under-capture that chemistry; either way, that's worth a targeted second search.
Run a targeted search in EurekaTrack filings past the lag window
Because publication lags filing by roughly 18 months, 2025 and 2026 filings are still arriving; a fresh pull closer to the next reporting cycle will sharpen the flat 2021-2024 trend read.
Set a monitoring alert in EurekaCommon questions about hybrid supercapacitor current collector patents
The assignee ranking covers 50 companies and research institutions, with the leader holding 10 of the 71 records in scope. The top 5 assignees combined account for 49.3% of all records, and extending to the top 10 brings that to 64.8%. Below that concentration sits a long tail of assignees filing in much smaller numbers, including universities and individual research institutes rather than only large corporations.
Filing peaked at 9 records in 2017 and has not returned to that level since. The most reliable recent comparison, 2021 to 2024, shows filings flat at 1 per year — a 0% change rather than clear growth or decline. Because publication typically lags actual filing by around 18 months, the 2025 and 2026 figures in the dataset are still incomplete and should not be read as a fresh downturn.
Almost all records — 94.4% of the 71 in scope — carry the capacitor classification H01G, and 56.3% also carry the battery classification H01M, reflecting that these filings are explicitly hybrid by design. Smaller technology threads appear under classifications like C01B (non-metallic elements and inorganic compounds) and H01L (semiconductor devices), but each covers only a handful of records rather than a substantial sub-field.
The United States and China lead as receiving offices, with 17 and 16 records respectively. Europe (EPO) and Japan each show 6, India shows 5, and WIPO PCT filings account for another 5. This distribution suggests activity is centred on the two largest markets, with international PCT filings used selectively rather than as the default route.
US6252762B1, covering a rechargeable hybrid battery/supercapacitor system, carries 369 citations — far ahead of any other record in this set — which signals it shaped the vocabulary and baseline architecture that later filings built on or worked around. High citation count reflects age and influence within the searched corpus more than current enforceability, so it should be read as a map of prior art density rather than a live blocking claim without direct legal review.
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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.