Asymmetric Supercapacitor Current Collector Patents: Leaders & Gaps 2026
- Flat filing curve. activity peaked at 7 families in 2023 after a 2017 base of 6, with no sustained growth in between — this is a narrow, mature-shaped filing pool rather than an expanding one.
- US-centred filing. 19 of 45 families route through the United States, more than double the next office, China at 9, with India ahead of Europe, Canada and Germany.
- Almost no co-filing. only 3 co-assignee pairs appear across 45 families, and recent-year momentum for every top assignee reads flat or -100% YoY — ownership here is fragmented and largely solo.
What this dataset covers
This landscape tracks 45 patent families filed against asymmetric and hybrid supercapacitor architectures where the claims specifically address the current collector — corrosion resistance, carbon coating, or low-resistance interfaces — rather than the electrode or electrolyte chemistry alone. The search combines title-level supercapacitor terms with title/claim-level current-collector language, scoped to the H01G11/68, /70 and /26 subclasses that cover capacitor electrode and terminal construction.
Coverage runs from 2015 through the 2026 data cut-off. Because publication typically lags filing by around 18 months, the 2025 and 2026 counts in any trend line understate real activity; treat the most recent one to two years as a floor, not a ceiling.
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Filing trend and technology composition
Two views of the same 45-family set: how filing volume has moved year over year, and which IPC subclasses the same records also touch, which shows how tightly current-collector claims stay bound to core capacitor construction.
Filing trend, 2017–2026
Filings opened at 6 in 2017, sat at 2 by the 2022 midpoint, and rose to a peak of 7 in 2023 before tapering into a partial 2026. That shape — an early cluster, a mid-period dip, then a modest late peak — is consistent with a niche that periodically gets revisited rather than one under sustained investment.
IPC composition
Every record carries an H01G capacitor classification by construction of the search, but 12 also touch H01M battery and cell classes, and smaller counts spill into nanotechnology (B82Y), organic semiconductors (H10K), other-metal compounds (C01G), semiconductor devices (H01L) and even diagnostic/surgical applications (A61B) — signalling that current-collector innovation here is being pulled in from adjacent energy-storage and materials fields rather than developed in isolation.
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 Asymmetric Supercapacitor Current Collector with Eureka
This page is one run against one query. Ask Eureka your own question about asymmetric supercapacitor current collector and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
Method for the production of a cylindrical hybrid supercapacitor comprising an ionic alkali metal
The invention relates to a process for the preparation of a cylindrical alkali metal-ion hybrid supercapacitor and to a cylindrical alkali metal-ion hybrid supercapacitor obtained according to said process.Filed by Blue Solutions; published 2019-10-31 as US20190333709A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160071658A1 | Electrochemical supercapacitor device made from an electrolyte comprising, as a conductive salt, at least one… | 16 |
| 2 | US20190180949A1 | supercapacitor | 14 |
| 3 | WO2021245559A1 | Conductive two-dimensional (2D) covalent organic frameworks (COFS) and method of making an electrode material | 13 |
| 4 | US9640334B2 | Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material | 13 |
| 5 | US10854395B1 | Asymmetric supercapacitor with hierarchical electrodes | 12 |
| 6 | US20170004930A1 | Electrochemical cell, energy storage system and vehicle comprising such a system | 8 |
| 7 | CN113035590A | 非对称三维叉梳微柱阵列电极结构超级电容器制备方法 | 7 |
| 8 | US20180218846A1 | Ultrathin Asymmetric Nanoporous-Nickel Graphene-Copper Based Supercapacitor | 4 |
| 9 | CN105355459A | 一种可编织的不对称电容器及其制备方法 | 4 |
| 10 | WO2014135678A1 | Asymmetric supercapacitor with alkaline electrolyte comprising a three-dimensional negative electrode and met… | 4 |
Citation counts reflect standing within this searched corpus and favour older filings; read them as a signal of influence on later art, not as a ranking of 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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Three read-throughs from the filing, geography and citation data — useful for deciding where to file and what to watch.
Growth is flat, not compounding
The midpoint year, 2022, sits at just 2 families, below both the 2017 starting level and the 2023 peak. A field that dips before its peak rather than climbing steadily suggests episodic rather than sustained R&D investment in current-collector-specific claims.
US filing leads by more than 2x
The United States receives more than double the filings of China, the next largest office, with India ahead of the combined EPO, Canadian and German totals. Freedom-to-operate work should weight US prior art most heavily, but not exclusively.
Ownership is fragmented, not networked
Only one pairing repeats more than once. Recent-year momentum for the assignees tracked is flat or negative across the board, which points to a space of independent, often single-filing entrants rather than a small set of firms building on each other's work.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to asymmetric supercapacitor current collector, with the prior art for and against each one.
Who is filing, and where the gaps sit
No assignee in this dataset shows positive recent-year momentum; several of the more active named filers report zero filings in the latest tracked year, some down 100% year over year. That combination — historical activity, no current push — is itself a finding: it points to claim space that was staked out early and then left alone.
Historical filers have gone quiet
Assignees with the deepest filing history in this set, including several university and institute filers, show no activity in the most recent tracked year. This does not mean the underlying claims have lapsed — it means no one is actively extending them right now.
No single owner controls the core claims
With co-filing rare and momentum flat across the board, the current-collector claim space reads as distributed rather than blocked by one or two large portfolios — a different risk profile than a field with one dominant assignee.
US remains the primary filing venue
Nearly half of all tracked families route through the United States. Entrants planning a defensive or offensive filing strategy should treat US art as the baseline search, supplemented by China and India rather than led by them.
| Assignee | Recent year | YoY |
|---|---|---|
| King Fahd University of Petroleum and Minerals | 0 | -100% |
| Shafudi Group Co., Ltd. | 0 | — |
| Commissariat à l'énergie atomique et aux énergies alternatives (CEA) | 0 | — |
| Nanotek Instruments, Inc. | 0 | — |
| Tsinghua University | 0 | — |
| Shenzhen Tsinghua University Research Institute | 0 | -100% |
| PONDICHERRY UNIVERSITY | 0 | — |
| MANCEVSKI VLADIMIR | 0 | — |
Where to take this analysis
The dataset points to a narrow, fragmented field with quiet incumbents rather than an actively contested one. Three directions follow from that.
Map the quiet portfolios
Assignees with zero recent-year filings still hold claims that may be enforceable. Before filing into a sub-area they touched, check whether those families remain in force.
Explore assignee portfolios in EurekaTest the under-claimed branches
Carbon-coated corrosion resistance and low-resistance hybrid-cell interfaces show adjacent IPC activity but few dedicated current-collector claims — a candidate area for a first-mover filing.
Run a white space search in EurekaTrack the next 18 months carefully
The 2025-2026 counts in this dataset are necessarily incomplete due to publication lag. Re-run the trend view periodically rather than treating the current partial-year figure as final.
Set up filing alerts in EurekaCommon questions about this landscape
This dataset tracks 45 patent families published between 2015 and the 2026 cut-off that combine asymmetric or hybrid supercapacitor claims with current-collector-specific language such as corrosion resistance or carbon coating. That is a small, specialised pool compared to broader supercapacitor electrode or electrolyte filings. Because publication lags filing by roughly 18 months, the true count for the most recent one to two years will be somewhat higher once later filings publish.
Filing is fragmented rather than concentrated: no single assignee dominates the 45-family set, and only three co-assignee pairs appear at all. Several of the more historically active filers, including university and institute assignees, show zero filings in the most recent tracked year. Practically, this means competitive monitoring should track a list of individual filers rather than assume a small number of large portfolios control the space.
The United States is the leading receiving office by a wide margin, with 19 of the 45 tracked families, more than double China's 9. India, at 6, sits ahead of the European Patent Office, Canada and Germany combined. A freedom-to-operate search weighted toward US and Chinese art, with a secondary check against Indian filings, will cover the large majority of activity in this dataset.
The trend is flat rather than growing. Filings started at 6 in 2017, dropped to 2 by the 2022 midpoint, then rose to a peak of 7 in 2023 before tapering. That dip-then-peak shape does not show the steady year-over-year increase typical of an actively scaling technology, and recent-year momentum for named assignees is flat or negative across the board.
US20160071658A1, covering an electrochemical supercapacitor device using an alkali-element conductive salt other than lithium, carries the highest citation count in this dataset at 16. High citation counts inside a searched corpus tend to favour older filings simply because they have had more time to be cited, so this figure signals historical influence on later filings rather than current commercial dominance. Newer high-citation records such as WO2021245559A1, covering conductive 2D covalent organic frameworks for electrode materials, are worth tracking as a more current influence signal.
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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.