Asymmetric Supercapacitor Patents: Leaders, Trends & White Space 2026
- Filing peaked in 2017 at 10 families and has not returned to that level since, with the 2022 midpoint at just 2 — a flat-to-declining trend rather than an emerging one.
- H01M dominates at 37 of 39 records meaning nearly every filing frames the asymmetric cell as a battery-adjacent energy storage device, not a pure capacitor structure under H01G.
- The United States receives 17 of the filings more than four times the next largest office, so freedom-to-operate work should start with USPTO prosecution history, not PCT or EPO records.
What this landscape covers
This dataset tracks patent families at the intersection of asymmetric and hybrid supercapacitor architectures and the manufacturing methods needed to move them off the lab bench — electrode coating scale-up, roll-to-roll production and mass-manufacturing processes. It captures 39 published families filed between 2015 and the 2026 cut-off, indexed across battery, capacitor and adjacent materials classifications.
Because publication typically lags filing by around 18 months, the most recent one or two years in any trend chart will always understate actual filing activity; treat the 2025-2026 figures as provisional floors, not final counts.
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Filing trend and technology composition
Two views of the same 39-family set: how filing volume has moved year over year, and which classification codes the applicants chose to describe the technology.
A 2017 peak that has not repeated
Filings hit 10 in 2017, the high point across the whole window, then dropped and stayed low; by the 2022 midpoint annual filings were down to 2. That pattern reads as an early flurry of foundational filings followed by a long tail, rather than a technology still gathering filers.
Battery classification, not capacitor classification, dominates
37 of 39 records carry an H01M (batteries, cells & fuel cells) code against 17 for H01G (capacitors proper) — many families sit in both. A smaller cluster touches C07C acyclic/carbocyclic compounds (9), suggesting electrode or electrolyte chemistry claims layered on top of the device architecture, with thin single-digit counts in nanotechnology, semiconductor and powder-metallurgy codes marking narrower, more experimental branches.
Shares are the percentage of the 39 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Asymmetric Supercapacitor Scale-Up and Mass Production with Eureka
This page is one run against one query. Ask Eureka your own question about asymmetric supercapacitor scale-up and mass production and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this set
Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material
A flexible, asymmetric electrochemical cell comprising a sheet of graphene paper as first electrode built from nano graphene platelets under 1 nm thick with electrolyte-accessible pores, paired with a thin-film or paper-like separator and electrolyte, and a second electrode of different composition — the two electrodes sandwiching the separator into a flexible laminate. The asymmetric cells built this way are described as reaching exceptionally high capacitance, specific energy, and stable long cycle life.US9640334B2, granted to Nanotek Instruments Group, LLC, 2017-05-02 — the granted counterpart of the most-cited record in this set, US20110183180A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20110183180A1 | Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material | 207 |
| 2 | US20190221891A1 | Thin film-based energy storage devices | 19 |
| 3 | US9640334B2 | Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material | 13 |
| 4 | US20180159106A1 | Energy providing devices and applications thereof | 12 |
| 5 | WO2018102517A1 | Energy providing devices and application thereof | 9 |
| 6 | US20200203692A1 | Energy providing devices and applications thereof | 7 |
| 7 | US10629880B2 | Energy providing devices and applications thereof | 6 |
| 8 | US11258134B2 | Energy providing devices and applications thereof | 4 |
| 9 | WO2019143576A1 | Thin film-based energy storage devices | 4 |
| 10 | US11276885B2 | Thin film-based energy storage devices | 3 |
Citation counts are drawn from within this searched corpus and favour older filings; use them as a signal of influence on later filers, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Activity has cooled since an early peak
The 2017 high of 10 families has not been matched since, and the 2022 midpoint of 2 confirms a declining trajectory rather than a plateau. Recent-year momentum data shows the most active named assignees — including Atlas Power Technologies, the University of California Regents, and Nanotek Instruments — all at zero filings in the latest tracked year.
Applicants frame this as energy storage, not capacitor design
More than twice as many records sit in the battery classification H01M as in the capacitor classification H01G. Any freedom-to-operate search limited to capacitor codes alone will miss the majority of relevant prior art.
The US is the dominant receiving office by a wide margin
USPTO receives 17 of the 39 records, well ahead of WIPO/PCT (7), Canada and Europe (5 each), and India (2). A single AT filing rounds out the set. Clearance work should prioritise US prosecution history before extending to PCT family members.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to asymmetric supercapacitor scale-up and mass production, with the prior art for and against each one.
Who is filing, and where the gaps sit
The assignee list is short and the co-filing network is thin — a handful of repeat pairings account for most of the connected activity, with a long tail of single-filing entrants around them.
A small, tightly linked filing group
Zhamu Aruna appears as the common node across the three strongest co-assignee pairs in the dataset — with Yu Zhenning, Shi Jinjun, and Liu Chen Guang each co-filing twice. That points to one research or inventor cluster driving a disproportionate share of the connected filings.
Momentum has stalled across the top of the list
Every assignee flagged in the recent-momentum data — Atlas Power Technologies, the University of California Regents, Printed Energy, Nanotek Instruments, and the Zhamu/Yu inventor pair — shows zero filings in the latest tracked year, with Atlas Power Technologies down 100% year over year.
US-first filing strategy is the norm
The receiving-office split shows a clear US-first pattern, with PCT used as the main secondary route (7 filings) ahead of direct EPO or Canadian filings.
| Assignee | Recent year | YoY |
|---|---|---|
| ATLAS POWER TECHNOLOGIES INC | 0 | -100% |
| The Regents of the University of California | 0 | — |
| Printed Energy Pty Ltd | 0 | — |
| Nanotek Instruments, Inc. | 0 | — |
| ZHAMU ARUNA | 0 | — |
| YU ZHENNING | 0 | — |
| SHI JINJUN | 0 | — |
| LIU CHEN GUANG | 0 | — |
Where to take this next
The landscape narrows a broad search into a specific set of assignees, codes and jurisdictions — the next step is testing a candidate claim or product against that set directly.
Run a freedom-to-operate check
Test a specific electrode coating or cell architecture against the US-heavy filing set identified here, starting with the H01M and H01G overlap rather than either code alone.
Open Eureka to run a clearance search →Draft around the cited claims
Use the most-cited records as the starting point for a design-around analysis, focusing on the flexible-laminate and nano graphene platelet claim language.
Explore claims in Patsnap Eureka →Common questions on this landscape
Filing activity peaked in 2017 at 10 families in this dataset and has declined since, with the 2022 midpoint down to 2 filings a year. The most recent tracked year shows the previously active assignees at zero filings, which suggests the field has cooled rather than accelerated. Because publication lags filing by roughly 18 months, the very latest year is always undercounted, but the multi-year downward trend predates that lag effect and looks genuine.
37 of the 39 records in this set carry an H01M code, the classification for batteries, cells and fuel cells, versus 17 for H01G, the dedicated capacitor code. This happens because asymmetric and hybrid supercapacitor designs deliberately borrow one battery-type electrode to boost energy density, so patent examiners and applicants often describe the device in battery terms even when the claims are capacitor-adjacent. A search limited to capacitor classifications alone will miss most of the relevant prior art here.
The United States is the dominant receiving office in this dataset with 17 of 39 filings, more than three times any other single office. WIPO/PCT filings (7) and direct Canadian and European filings (5 each) make up most of the remainder, with a small residual in India and Austria. A clearance search should therefore start with US prosecution and litigation history before extending to PCT national-phase entries.
US9640334B2, assigned to Nanotek Instruments Group, LLC and granted in 2017, claims a flexible asymmetric electrochemical cell built from a nano graphene platelet electrode paired with a differently-composed second electrode, separated by a thin-film or paper-like separator in a flexible laminate. It is the granted counterpart to the most-cited record in this dataset, the 2011 published application on the same nano graphene platelet approach. Anyone building a flexible asymmetric cell with a graphene-paper electrode should review this family's claim scope closely before finalizing an electrode architecture.
The classification data shows heavy concentration in H01M and H01G, with much thinner coverage in nanotechnology (B82Y, 2 records), semiconductor devices (H01L, 2), and powder metallurgy (B22F, 1). Those thin branches — particularly roll-to-roll coating uniformity, thin-film lamination methods, and current-collector materials outside standard foils — are under-claimed relative to the core electrode-chemistry cluster. A narrowly drafted process claim in one of those areas is less likely to run into the dense prior art sitting around the core cell 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.