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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/graphene-supercapacitor-electrode-material-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · SupercapacitorsGraphene Supercapacitor Electrode Material Patents
- Filing has cooled since 2017. Four families published that year, the peak of the set, against a single family at the 2022 midpoint — this is a field with a filed-then-paused shape, not a rising one.
- China dominates the filing venue. Twelve of seventeen records were filed in China, versus three PCT applications and two US filings, so freedom-to-operate work has to start with Chinese-language prior art.
- The assignee base is fragmented. No single filer shows momentum in the latest year across the group tracked here, pointing to a long tail of single- or few-filing entrants rather than one entrenched leader.
17
Published Records
53%
Top-5 Share of All Records
0%
Filing Growth 2021→2024
CN
Leading Jurisdiction
Filing growth compares 2021 (1 records) with 2024 (1) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 17 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this dataset covers
This landscape tracks 17 published patent families at the intersection of graphene electrode fabrication and supercapacitor device claims, filtered to records that name graphene electrodes, reduced graphene oxide, 3D graphene or graphene composite electrodes directly in the title or claims, and classified under the core capacitor IPC codes H01G11/36, H01G11/32 and C01B32/182. The set spans filings from 2015 through the 2026 cut-off, though the most recent year is necessarily incomplete because publication trails filing by roughly 18 months.
Every record in this set carries an H01G capacitor classification, confirming the search is tightly scoped to capacitor-electrode claims rather than graphene synthesis in general. Smaller counts in inorganic compounds, ceramics, coatings and battery-adjacent classes show where electrode material work spills into neighbouring fields.
Filing activity and technology composition
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The data
Filing trend and technology mix
Two views of the same 17-family set: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017–2026
Filings peaked at 4 in 2017 and had fallen to 1 by the 2022 midpoint, with 2026 showing zero so far — consistent with a field that saw an early burst of interest followed by a pull-back rather than sustained growth. Treat the tail end of the chart as understated: publication lag means 2025 and 2026 filings are still arriving.
IPC subclass composition
H01G (capacitors) accounts for all 17 records, the anchor classification for this search. Secondary classifications in C01B (inorganic compounds), C04B (ceramics), C09D (coatings) and H01M (batteries) each appear only a handful of times, marking where graphene electrode work touches adjacent material and device fields rather than sitting inside them.
Shares are the percentage of the 17 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Graphene Supercapacitor Electrode Material with Eureka
This page is one run against one query. Ask Eureka your own question about graphene supercapacitor electrode material and every answer comes back with the patent numbers behind it.
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The most-cited families in this set
Representative filing
Supercritical fluid production of graphene-based supercapacitor electrode from coke or coal
NANOTEK INSTRUMENTS GROUP, LLC
US11121360B2 describes exposing coke or coal powder to a supercritical fluid inside a pressure vessel to enable penetration into the material's internal structure, then rapidly depressurising the fluid to exfoliate and separate the powder into graphene-based material suitable for supercapacitor electrodes. The route starts from low-cost carbon feedstocks — petroleum coke, coal-derived coke, meso-phase coke, synthetic coke, leonardite, anthracite, lignite or bituminous coal — rather than from purified graphite.Filed by Nanotek Instruments Group, LLC; granted 2021-09-14.
Top-cited records
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN104211047A | 石墨烯、石墨烯电极、石墨烯超级电容器及其制备方法 | 25 |
| 2 | US20180019071A1 | Supercritical Fluid Production of Graphene-Based Supercapacitor Electrode from Coke or Coal | 21 |
| 3 | CN110289173A | 一种高比电容的细菌纤维素基柔性氮掺杂石墨烯超级电容器电极材料及其制备方法和应用 | 13 |
| 4 | CN109087822A | 一种柔性纸基石墨烯超级电容器制备方法 | 13 |
| 5 | CN108470636A | 一种石墨烯电极片及其制备方法及用其制备超级电容器的方法 | 7 |
| 6 | WO2018013254A1 | Supercritical fluid production of graphene-based supercapacitor electrode from coke or coal | 5 |
| 7 | US11121360B2 | Supercritical fluid production of graphene-based supercapacitor electrode from coke or coal | 5 |
| 8 | CN107331529A | 氧化石墨烯浆料、微型石墨烯电极及其制备方法、微型石墨烯超级电容器 | 4 |
| 9 | CN105355465A | 一种非晶碳/垂直石墨烯复合电极材料的制备方法 | 3 |
| 10 | CN118231150A | 一种金刚烷胺修饰的石墨烯电极材料及其制备方法 | 1 |
Citation counts are drawn from a searched corpus and skew toward older filings; read them as a signal of influence on the field, not 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.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for filing strategy
Four read-outs from the trend, venue and citation data that matter more than the raw counts on their own.
Filing momentum
4 → 0
peak year to latest year
The early-2017 burst has not been repeated
Filing peaked at 4 families in 2017 and has drifted down since, sitting at 1 by 2022 and showing nothing yet in 2026. That shape looks like an early wave of exploratory filing that cooled rather than a technology still building claim density.
Read with an 18-month publication lag in mind for the last one to two years.
Filing venue
12 of 17
records filed in China
China is the primary filing jurisdiction by a wide margin
Twelve of the seventeen tracked families were filed in China, against three PCT applications and two US filings. Any clearance search for this space has to include Chinese-language specifications, not just English-language abstracts.
PCT filings signal intent toward broader international protection but do not confirm it.
Assignee concentration
17 families, 1 co-filing pair
collaboration density
Almost no cross-assignee collaboration
Only one co-assignee pairing appears across the set. Most families in this landscape were filed by a single institution or company acting alone, which is typical of an academic-heavy, early-stage claim environment rather than a supply-chain-coordinated one.
A thin collaboration graph often precedes consolidation once a dominant fabrication route emerges.
Citation leader
Cited 25
top-cited family
The oldest highly-cited family still anchors the field
CN104211047A, covering graphene, graphene electrodes and graphene supercapacitors together, carries the highest citation count in the set. Later entrants cite it as foundational prior art on the electrode-plus-device claim structure.
High citation count reflects age and breadth of claim, not remaining freedom to operate around it.
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to graphene supercapacitor electrode material, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
The assignee base is fragmented: no filer in this set shows filing activity in the latest tracked year, and the strongest co-filing relationship links a materials company to a single university partner. That combination — flat momentum, thin collaboration — is more consistent with a technology still being staked out than one with an established leader.
Filing pattern
0 latest-year filings
across tracked assignees
No assignee is currently active
Every assignee surfaced in the recent-momentum data — from Nanotek Instruments to several Chinese universities and equipment makers — shows zero filings in the latest tracked year. That is consistent with the overall downward filing trend rather than a data gap specific to any one filer.
Watch for a resumption in filing once publication lag clears the 2024–2026 window.
Institutional mix
Universities + one materials firm pairing
collaboration structure
Universities dominate the assignee list
Several of the named assignees are Chinese universities (national defence, provincial science and technology institutions) rather than commercial electrode manufacturers. The one identified co-assignee pair links a catalytic-materials company to a university, suggesting sponsored or licensed research rather than in-house commercial R&D.
Academic-heavy assignee lists often precede a licensing wave once a fabrication route is de-risked.
Geographic concentration
12 CN filings
vs. 3 PCT, 2 US
Filing is concentrated in one jurisdiction
With three-quarters of the set filed in China and only a handful seeking broader PCT or US protection, most of the documented claim activity has limited enforceability outside China. That narrows freedom-to-operate risk for teams building or selling electrodes primarily into Western markets, but not for anyone sourcing components from Chinese suppliers.
Confirm national-phase entry status individually before relying on this as a clearance conclusion.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Nanotek Instruments Group, LLC | 0 | — |
| Ningbo CRRC New Energy Technology Co., Ltd. | 0 | — |
| National University of Defense Technology, PLA | 0 | — |
| Qingdao Jiuzhou Qianhe Machinery Co., Ltd. | 0 | — |
| Shaanxi University of Science & Technology | 0 | — |
| Liaoning University | 0 | — |
| Xi'an Jiaotong University | 0 | — |
| Kent Catalytic Materials Co., Ltd. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's next
Where to take this analysis
The trend and assignee data point to specific next steps depending on whether you are clearing a design or scouting for licensing targets.
Run a freedom-to-operate check against the China-filed set
With twelve of seventeen families filed in China, a clearance search limited to English-language US and PCT records will miss most of the documented claim activity in this space.
Explore in Eureka →Track the coke-and-coal exfoliation route separately
The most-cited US family and several Chinese filings both target low-cost carbon feedstocks rather than purified graphite, suggesting this sub-route deserves its own watch list independent of the broader graphene-electrode set.
Explore in Eureka →Revisit filing momentum once 2025–2026 publications land
The apparent decline to zero in the latest years is partly a publication-lag artefact; re-running this trend in twelve months will show whether filing has genuinely cooled or simply not yet been published.
Explore in Eureka →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about graphene supercapacitor electrode patents
This landscape identifies 17 published patent families matching graphene electrode, reduced graphene oxide, 3D graphene or graphene composite electrode terms combined with core capacitor IPC classifications. That is a narrow, tightly-scoped set rather than a comprehensive count of every graphene-adjacent capacitor filing, since broader synthesis or unrelated device patents are excluded by design. Anyone running a full clearance search should expect the true universe of related filings to be larger once adjacent classifications and non-English keyword variants are added.
No — filing peaked at 4 families in 2017 and had fallen to 1 by the 2022 midpoint, with nothing yet published in 2026. That downward shape suggests an early wave of exploratory filing that has not been sustained, though the very last one to two years are always understated because publication trails filing by around 18 months. A meaningful read on 2024–2026 activity will only be possible once that lag clears.
China, by a wide margin: twelve of the seventeen tracked families were filed there, against three PCT applications and two US filings. Any clearance work limited to English-language US patents would miss the majority of documented claim activity in this space. Teams sourcing graphene electrode components from Chinese suppliers or planning to manufacture in China should treat Chinese-language prior art as the primary search corpus, not a supplement to it.
US11121360B2, assigned to Nanotek Instruments Group, LLC and granted in September 2021, covers a supercritical-fluid process for producing graphene-based supercapacitor electrode material from coke or coal powder. The process exposes the powder to a supercritical fluid under pressure to enable penetration into its internal structure, then rapidly depressurises the fluid to exfoliate and separate the material. The claims are specific to this feedstock-and-process combination — coke or coal input plus supercritical exfoliation — rather than to graphene electrodes generally, which leaves other fabrication routes open.
Filing density is thin outside the core H01G capacitor classification: secondary areas like ceramic composite current collectors, coating-based deposition methods and biomass-derived flexible electrodes each show only one or two records in this set. That low density does not mean the technology is easy or unimportant — it means the claim space is comparatively open relative to the coke-and-coal exfoliation and doped-graphene routes that already carry the most-cited families. A first claim in one of these thinner branches would need to differentiate clearly from the CN104211047A and US11121360B2 baseline art.
Answers are grounded in the same dataset. Derived from a Patsnap search on Graphene Supercapacitor Electrode Material covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.