Flexible Supercapacitor Current Collector Patents: Leaders & White Space 2026
A data-backed look at flexible supercapacitor current collector patents: filing trends, leading assignees, IPC composition and where claim space remains open through 2026.
Filing growth = 2021 (5 records) → 2024 (4); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 45 records in scope (CR5), not the ranked leaders only.
What this landscape covers
Flexible supercapacitor current collectors sit at the intersection of two IPC groups: H01G11, which covers capacitors broadly, and H01M4, which covers electrode materials shared with battery chemistry. Every one of the 45 records in scope carries an H01G classification, and a meaningful minority also touch polymer composition (C08L, C08J, C08K) or coatings (C09D) — evidence that the collector itself is usually claimed alongside a composite electrode material or a flexible substrate treatment, not as a bare metal foil.
This is a small, geographically concentrated field: 30 of the tracked filings were received in China, with South Korea, India, the Philippines, the United States and the WIPO PCT route accounting for the rest in single or low-double digits. No single assignee controls the space — the leader holds only 3 records — which points to a technology still being explored through varied material routes rather than converging on one dominant architecture.
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Filing trend and technology composition
Two views of the same 45-record dataset: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing activity, 2017-2026
Annual filings rose to a peak of 6 records in 2023 before easing to 4 by 2024, a -20% move from the 5 filed in 2021. Because publication typically lags filing by around 18 months, the 2025 and 2026 counts shown here are still incomplete and should not be read as a real decline.
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.
IPC subclass composition
All 45 records carry an H01G capacitor classification, the anchor for this search. Beyond that, H01M4 (battery/electrode overlap) and C08L polymer-composition classes each appear in 8.9% of records, with coating (C09D), printed-circuit (H05K) and further polymer-processing classes (C08J, C08K) each present in 6.7% — a signature of collectors claimed together with composite or coated electrode materials rather than as standalone metal parts.
Shares are the percentage of the 45 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Flexible Supercapacitor Current Collector Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about flexible supercapacitor current collector patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
IN390312B — Metal-carbon aerogel composite electrodes and aerogel supercapacitors
An active electrode material composition for supercapacitors built on a carbon aerogel scaffold with metal nanoparticles — Al, Mn, Cr, Co or Zn — combined with a conductive inter-layer and polymer binders. The construction targets a composite electrode rather than a bare current collector.Filed by SECRETARY, published 2022-03-04.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN103923529A | 一种复合油墨、柔性超级电容器电极及其制作方法 | 17 |
| 2 | CN109216035A | 一种全固态平面非对称微型超级电容器及其制备方法 | 12 |
| 3 | US20150235775A1 | Electrode material, preparation method thereof and supercapacitor based thereof | 10 |
| 4 | CN112735837A | 一种平面式超级电容器及其制备方法 | 9 |
| 5 | CN113675005A | 一种柔性二硫化钼/活化碳布复合材料及其制备方法和在柔性超级电容器中的应用 | 7 |
| 6 | CN112103090A | 一种自支撑柔性超级电容器 | 7 |
| 7 | WO2017149044A1 | A method for manufacture of electrochemical system of supercapacitor of flexible ultra-thin structure | 6 |
| 8 | CN110323078A | 一种导电聚吡咯自支撑薄膜电极及其制备方法以及一种柔性超级电容器及其制备方法 | 5 |
| 9 | KR1020170100714A | Method of manufacturing flexible micro supercapacitor | 5 |
| 10 | CN114684814A | 自支撑柔性石墨烯薄膜的制备方法及其应用于柔性超级电容器 | 4 |
Citation counts reward older filings that have had more time to accumulate references within the searched corpus — read them as a signal of influence on later work, not as a measure of current commercial importance.
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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Three read-outs from the ranking, the trend and the citation table that matter more than the raw counts.
No single gatekeeper yet
The leading assignee holds only 3 of the 45 records in scope, and the top 5 combined account for 24.4% of all filings. That is a low concentration for a field this size — freedom-to-operate risk is spread across many small filers rather than blocked by one or two large portfolios.
A plateau, not a collapse
Filings moved from 5 in 2021 to a peak of 6 in 2023, then to 4 in 2024 — a -20% change over that span. Given the roughly 18-month lag between filing and publication, the softer-looking 2025-26 figures are not yet a reliable read on current activity.
China is the filing centre of gravity
China accounts for 30 of the 45 records in scope, well ahead of South Korea's 5 and the low single-digit counts from India, the Philippines, the United States and the WIPO PCT route. Any competitive-monitoring effort in this space gets most of its signal from CNIPA publications.
Collectors are claimed with the electrode, not alone
Every record carries an H01G capacitor classification, but material-composition classes — C08L, H01M4, C08J, C08K, C09D — each show up in a meaningful minority of filings. That pattern means most claims bundle the collector with a specific composite, coating or fibre treatment rather than protecting the bare conductive substrate.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to flexible supercapacitor current collector patent landscape, with the prior art for and against each one.
Where to take this analysis
The dataset points to a fragmented field with room to move — the next steps depend on whether you are filing, licensing or scouting.
Map the material-composition overlaps
Pull the records that pair H01G with C08L, C08J or C08K and check whether the claims lock the current collector to a specific polymer or coating chemistry, or leave that scope open.
Explore composition claims in EurekaTrack the China filing pipeline
With 30 of 45 records routed through CNIPA, monitor recent CNIPA publications directly rather than relying on PCT filtering alone, since many single-country filings never enter the WIPO route.
Set up a CNIPA monitor in EurekaRevisit citation leaders for design-around risk
The most-cited records skew toward earlier filings; check whether their claim scope has already been narrowed by later prosecution or opposition before assuming they still block a given approach.
Run a citation check in EurekaCommon questions about this landscape
The field is fragmented: across 38 ranked assignees covering 45 records, the leading filer holds only 3 records and the top 5 combined account for 24.4% of all filings in scope. That is a low concentration compared with more mature energy-storage subfields, meaning no single company's portfolio dominates freedom-to-operate analysis here. Most of the ranked assignees are universities and research institutes, particularly in China and South Korea, rather than established battery or capacitor manufacturers. A buyer or licensor should expect to negotiate with many small holders rather than one or two large ones.
Filings peaked at 6 records in 2023, up from 5 in 2021, before easing to 4 in 2024 — a -20% change over that three-year span. Because publication typically lags actual filing by around 18 months, the lower counts shown for 2025 and 2026 are incomplete rather than evidence of a real slowdown. Read the trend as a plateau after a modest run-up rather than a declining field. A clearer read on 2025-26 activity will only be available once those cohorts finish publishing.
China is the clear centre of activity, accounting for 30 of the 45 records in scope through CNIPA. South Korea is a distant second with 5 records, and India, the Philippines, the United States and the WIPO PCT route each contribute low single-digit counts. This concentration means monitoring CNIPA publications directly captures most of the field's activity, and PCT-only searches would miss the majority of relevant filings. Companies scouting this space should build China-specific search alerts rather than relying on international filing routes alone.
Every record in scope carries an H01G capacitor classification, but a meaningful share also touch polymer composition (C08L, C08J, C08K), coatings (C09D), printed-circuit integration (H05K) or fibre features (D01F), each present in roughly 5-9% of the 45 records. This overlap pattern shows that most claims bundle the current collector with a specific composite material, coating or substrate treatment rather than protecting a bare conductive foil on its own. A freedom-to-operate search that looks only at H01G will miss claims anchored in the material-composition classes.
With the top 5 assignees holding 24.4% of the 45 records in scope and the top 10 reaching 42.2%, this is a moderately fragmented field rather than one locked up by a handful of large portfolios. The leader's 3 records and fifth place's 2 records show a shallow drop-off rather than a steep one, and there is a long tail of single-filing entrants beyond the ranked leaders. That structure typically signals a technology still being explored through varied material and design routes rather than one that has consolidated around a dominant architecture.
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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.