Flexible Supercapacitor Electrode Patents: Leaders & White Space 2026
- Filing already peaked. 2018 was the high point at 9 filings; by the 2022 midpoint activity had fallen to 2, and the trend has not recovered since.
- China dominates the filing map. 35 of 46 records were filed at the China receiving office, versus 5 in the United States and 4 in India — this is a domestically-contested field first.
- No assignee has scale. The strongest co-filing pair links only two Dongguan-based entities, and every tracked assignee shows zero or negative filings in the latest year — ownership is fragmented, not consolidated.
What the filing record shows
Flexible supercapacitor electrode material sits at the intersection of energy storage and wearable or bendable hardware, and the patent record reflects a technology that has been explored broadly rather than industrialised by any one player. Across 46 patent families filed between 2015 and the 2026 cut-off, activity rose through the first years of the window, peaked in 2018 at 9 filings, and then declined — the 2022 midpoint sits at just 2 filings, well below peak. That shape is more consistent with a research-driven field that has not yet found a scaled commercial anchor than with a technology entering a growth phase.
The most-cited records — covering stretchable electrode assemblies, transition-metal-oxide/carbon-cloth composites, multi-dimensional carbon fibre electrodes, and manganese-dioxide/carbon composites — all originate from China-filed applications, which lines up with the receiving-office split of 35 China filings against single-digit counts everywhere else. Read together, the trend and the geography suggest a field where the underlying chemistry has been patented in many variants but where no single architecture has yet pulled ahead as a de facto standard.
Filing trend and technology composition
46 patent families published across the 2015-2026 window, concentrated heavily in China with a peak year already behind the field. Because publication lags filing by around 18 months, the most recent year shown is necessarily undercounted.
Peak in 2018, decline since
Filings ran from 5 in 2017 up to a peak of 9 in 2018, then eased down; by the 2022 midpoint only 2 families were filed, and the field has not returned to peak-year volume through the 2026 cut-off.
Concentrated in capacitor claims, thin elsewhere
Every record sits in H01G (capacitors), the anchor subclass defining the search. Secondary clusters are small and scattered — nanotechnology applications (B82Y, 3), inorganic compounds, addition and condensation polymers, polymer processing, and fibre features (2 each) — showing that adjacent materials science claims have been touched only lightly.
Shares are the percentage of the 46 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Flexible Supercapacitor Electrode Material with Eureka
This page is one run against one query. Ask Eureka your own question about flexible supercapacitor electrode material and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records and a representative filing
US9607771B2 — Flexible supercapacitor, method of manufacturing the same, and device including the flexible supercapacitor
A flexible supercapacitor, a method of manufacturing the same, and a device including the same are provided, the flexible supercapacitor includes a first flexible electrode assembly, a second flexible electrode assembly corresponding to the first flexible electrode assembly, a separator for preventing contact between the first flexible electrode assembly and the second flexible electrode assembly, and an electrolyte between the first flexible electrode assembly and the second flexible electrode assembly. The flexible supercapacitor may include a tube including the first flexible electrode assembly, the second flexible electrode assembly, the separator, and the electrolyte.Filed by Samsung Electronics, granted 2017 — one of the few non-China-origin records in this dataset and the clearest example of a tube-format flexible cell architecture claimed at the device level.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN104497229A | 一种可拉伸柔性超级电容器及其制备方法 | 27 |
| 2 | CN109243856A | 一种铁钴镍氧化物/碳布复合柔性电极的制备方法 | 24 |
| 3 | CN108091497A | 一种多维结构碳纤维柔性电极的制备方法 | 18 |
| 4 | CN110581028A | 一种二氧化锰/碳基柔性电极材料的制备方法 | 16 |
| 5 | CN108766776A | 一种适用于碳布基柔性超级电容器电极材料的制备方法 | 15 |
| 6 | CN104882295A | 碳化脱脂棉/石墨烯复合材料的制备方法 | 15 |
| 7 | CN112908722A | 一种制备高比电容的MnO<sub>2</sub>-碳布复合柔性电极材料的方法 | 12 |
| 8 | CN109326460A | 一种三氧化二铁/碳布复合柔性电极的制备方法 | 12 |
| 9 | CN109461597A | 一种柔性超级电容器及其电极、隔膜的制备方法 | 11 |
| 10 | CN111180218A | 柔性电极材料及其制备方法和柔性超级电容器 | 9 |
Citation counts favour older filings inside any searched corpus; treat this as a signal of influence within the dataset, not 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 patterns stand out once the raw counts are read against each other: where the claim density sits, who is actually filing, and what the citation leaders have in common.
The peak has already passed
Activity rose to 9 filings in 2018 and had fallen to 2 by the 2022 midpoint, with no recovery visible through the 2026 cut-off. A field with this shape rewards designing around existing claims rather than racing to file foundational ones — the foundational claims are largely already on the register.
This is a China-centred filing pool
China accounts for the large majority of receiving-office activity, with the United States, India and South Korea each in single digits. Any freedom-to-operate check for this material class has to start with the China-filed prior art, not the US or EU registers.
No consolidated owner
The strongest co-filing relationship in the dataset links two Dongguan-based entities on only two records, and every tracked assignee's latest-year filing count is flat or down. That is a fragmented-ownership signal — useful for a new entrant, since no incumbent holds a defensible filing cadence to out-pace.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to flexible supercapacitor electrode material, with the prior art for and against each one.
Assignee landscape: fragmented, university-heavy, no scaled leader
Recent-year momentum figures show every tracked assignee at zero or negative growth, and the strongest co-filing pair covers just two records — a pattern of many single- or double-filing entrants rather than a small set of dominant owners.
Vellore Institute of Technology
The only assignee in the tracked momentum set with any filing in the latest year, though even here activity is down 50% year-on-year — a marginal signal rather than a sustained push.
Chinese universities file broadly, not repeatedly
Wuhan Textile University, University of Electronic Science and Technology of China, Tiangong University, North China Electric Power University and East China University of Science and Technology all show zero filings in the latest tracked year, consistent with project-driven rather than programme-driven patenting.
Dongguan-based capacitor makers
The single strongest co-assignee relationship in the dataset links a Dongguan capacitor manufacturer with its affiliated R&D entity across two filings — a small but genuine industry-side signal inside an otherwise academic filing pool.
| Assignee | Recent year | YoY |
|---|---|---|
| VELLORE INSITUTE OF TECH | 1 | -50% |
| Wuhan Textile University | 0 | — |
| University of Electronic Science and Technology of China | 0 | — |
| Tiangong University | 0 | — |
| North China Electric Power University | 0 | — |
| East China University of Science and Technology | 0 | — |
| Dongguan Dongyangguang Capacitor Co., Ltd. | 0 | — |
| Dongguan Kaihong Technology R&D Co., Ltd. | 0 | — |
Where to take this analysis
The filing record points to a field with settled core claims but open adjacent territory. The next steps depend on whether the goal is defensive clearance or new filing.
Run a freedom-to-operate check against the China filing pool
With 35 of 46 families filed via China, any new electrode architecture needs its prior-art search anchored there first, not in the US or EU registers.
Explore prior art in EurekaMap the under-claimed sub-areas before drafting claims
Free-standing hybrid films, woven fibre architectures and binder-free processing show thin secondary-IPC coverage relative to the core capacitor cluster — a starting point for a first claim with fewer blocking references.
Analyze white space in EurekaCommon questions about this landscape
No single assignee holds a dominant share of this dataset's 46 patent families. Filing is spread across Chinese universities, a smaller set of industrial co-filers such as a Dongguan-based capacitor manufacturer and its affiliated R&D entity, and isolated international filers like Samsung Electronics and Vellore Institute of Technology. This fragmentation means competitive risk in this field comes from many small owners rather than one entrenched incumbent.
No, the trend has already peaked and declined. Filings rose to 9 in 2018, then fell to 2 by the 2022 midpoint, with no recovery through the 2026 data cut-off. Because publication lags filing by roughly 18 months, the most recent year is understated, but the multi-year decline before that point is a real signal, not an artefact of the lag.
China accounts for the large majority of the dataset at 35 of 46 families filed via its receiving office, well ahead of the United States (5), India (4) and South Korea (2). Any competitive or clearance analysis for this material class should treat China-filed prior art as the primary reference set rather than a secondary one.
US9607771B2, assigned to Samsung Electronics, claims a flexible supercapacitor built from paired flexible electrode assemblies, a separator and an electrolyte, including a tube-format device configuration. It blocks that specific tube-based device architecture and its stated manufacturing method, but it does not claim electrode material chemistry broadly — free-standing films, fibre composites and metal-oxide/carbon-cloth formulations documented elsewhere in this dataset sit outside its claim scope. A design-around typically means avoiding the tube-format device packaging rather than avoiding electrode materials work altogether.
The secondary IPC clusters — nanotechnology applications, inorganic compound chemistry, addition and condensation polymers, polymer processing and fibre features — each account for only 2-3 records against 46 in the core capacitor subclass. That gap suggests free-standing hybrid films, woven fibre electrode architectures and binder-free processing routes are claimed lightly relative to the core device-level patents, making them reasonable starting points for new filings.
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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.
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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.