Solid-State Supercapacitor Patents: Leaders, Trends & White Space 2026
- Flat filing activity. Filings peaked at 5 in 2018 and the 2022 midpoint sits at the same level, indicating a technology that plateaued rather than accelerated.
- Dual-classified subject matter. H01G (capacitors) and H01M (batteries and cells) each carry 15 of the 25 records, showing most filings sit at the capacitor-battery boundary rather than in pure capacitor claims.
- No single filer dominates recent years. Every tracked assignee shows zero filings in the latest year, meaning current momentum has stalled across the entire assignee set, not just at the top.
What this landscape covers
This dataset tracks patent families combining solid-state or all-solid-state supercapacitor claims with advanced electrode or electrolyte materials — graphene electrodes, MXene-based materials, and solid electrolyte formulations. It spans filings from 2015 through the 2026 data cut-off, drawing on 25 published records across capacitor, battery and materials-science classifications.
The technology sits at the intersection of two established fields — solid-state capacitor engineering and emerging 2D-material electrode chemistry — rather than being a single clean category. That intersection shapes everything downstream: which offices see the filings, which classifications the claims fall under, and where the unclaimed space actually is.
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Filing trend and classification spread
Twenty-five patent families make this a narrow, still-forming landscape rather than a mature, heavily contested one. The trend and classification data below frame where activity has concentrated and where it has not.
Filing trend: a peak in 2018, then a plateau
Filings rose to a peak of 5 in 2018, then activity through the 2022 midpoint held at the same level rather than continuing to climb — flat-to-declining momentum rather than the accelerating curve typical of a technology entering commercial scale-up. The most recent year is necessarily undercounted, since publication typically lags filing by around 18 months.
IPC composition: split between capacitor and battery classes
H01G (capacitors) and H01M (batteries, cells and fuel cells) each account for 15 of the 25 records, meaning many families are dual-classified — claimed as capacitor-assisted battery structures rather than standalone capacitors. Smaller counts in G11C (memory), C08G (condensation polymers) and C23C (coating and deposition) mark thin but present adjacent activity in electrolyte chemistry and electrode surface treatment.
Shares are the percentage of the 25 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Solid-State Supercapacitor Advanced Materials with Eureka
This page is one run against one query. Ask Eureka your own question about solid-state supercapacitor advanced materials and every answer comes back with the patent numbers behind it.
Try EurekaThe patents anchoring this space
All-solid-state-supercapacitor and a process for the fabrication thereof (US20160055983A1)
The filing discloses an all-solid-state supercapacitor with an enhanced electrode-electrolyte interface, intercalating a solid-state polymer electrolyte inside a conducting porous substrate coated with a charge-storage electrode material to raise specific and areal capacitance while lowering internal resistance (ESR).Filed by Council of Scientific & Industrial Research, published 2016-02-25.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5136478A | Solid electrolyte capacitor and method of making | 65 |
| 2 | US20160055983A1 | All-solid-state-supercapacitor and a process for the fabrication thereof | 40 |
| 3 | US5161094A | Solid electrolyte capacitor and method of making | 26 |
| 4 | US20200036070A1 | Capacitor-assisted solid-state battery | 19 |
| 5 | US11205798B2 | Capacitor-assisted solid-state battery | 18 |
| 6 | US20200036053A1 | Capacitor-assisted solid-state battery with quasi-solid-state electrolyte | 11 |
| 7 | WO2014170912A1 | All-solid-state-supercapacitor and a process for the fabrication thereof | 10 |
| 8 | US5047899A | Solid electrolyte capacitor and method of making | 10 |
| 9 | US20210351435A1 | Power storage device | 7 |
| 10 | US11171365B2 | Capacitor-assisted solid-state battery with quasi-solid-state electrolyte | 4 |
Citation counts reflect influence within this searched corpus and favour older filings; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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The dataset is small enough that individual filings move the picture — three findings stand out when the trend, classification and citation data are read together.
Activity has not returned to its 2018 peak
Five filings in 2018 remain the high-water mark for this dataset; the 2022 midpoint sits at the same level, and every tracked assignee shows zero filings in the latest year. That pattern reads as a niche that opened, drew a burst of interest, then went quiet rather than scaling.
Capacitor and battery claims are evenly split
Exactly 15 of 25 records sit in H01G and 15 sit in H01M, an unusually even split that signals most inventors are claiming hybrid or capacitor-assisted battery structures rather than pure supercapacitor devices.
Filing activity concentrates in the US and Europe
The United States (10) and the European Patent Office (7) account for the majority of receiving-office activity, with India, WIPO/PCT, Austria and China each contributing a handful of records — a geographically narrow filing base for a materials technology.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to solid-state supercapacitor advanced materials, with the prior art for and against each one.
Who is filing, and where the gaps sit
No assignee in this dataset shows filing activity in the most recent year, and the 25-family corpus is too thin to show a dominant leader — the interesting signal here is in the sub-areas nobody has staked out yet.
A stalled field, not a consolidating one
Every assignee tracked in the recent-momentum data — from research institutes to automotive and electronics majors — shows zero filings in the latest year. That is consistent with a technology past its initial filing burst and not yet in a second wave.
A mix of institutes, automotive and electronics firms
The assignee set spans a public research council, a Chinese energy-storage manufacturer, a global automotive technology arm, a Japanese electronics IP holding company and smaller specialty filers — no single filer type dominates the corpus.
Older solid-electrolyte capacitor patents still anchor the field
The most-cited records date back to foundational solid electrolyte capacitor work, with the 2016 all-solid-state supercapacitor filing and capacitor-assisted solid-state battery filings drawing the next tier of citations — the field's intellectual base predates its recent activity.
| Assignee | Recent year | YoY |
|---|---|---|
| Council of Scientific & Industrial Research | 0 | — |
| Nanjing Boo-chi New Energy Co., Ltd. | 0 | — |
| GM Global Technology Operations LLC | 0 | — |
| Panasonic Intellectual Property Management Co., Ltd. | 0 | — |
| QUADRI ELECTRONICS CORP | 0 | — |
| Sinnica Co., Ltd. | 0 | — |
| Shanghai Aowei Technology Development Co., Ltd. | 0 | — |
Where to take this analysis
A 25-family landscape is a starting map, not a final answer — these are the next steps worth taking before committing R&D or filing budget.
Check freedom to operate on hybrid claims
The even H01G/H01M split means capacitor-assisted battery structures carry real prior art on both sides of the classification line. Run a targeted claims review before filing in that overlap.
Explore claim scope in EurekaTrack the under-claimed materials branches
MXene interface engineering and solid polymer electrolyte-electrode intercalation show thin filing density relative to the core classes — worth a deeper prior-art sweep before assuming the space is open.
Run a white space search in EurekaWatch for a second filing wave
Zero latest-year activity across all tracked assignees does not mean the technology is abandoned — publication lag means 2025-2026 filings are still arriving. Monitor for re-entry.
Set up monitoring in EurekaCommon questions on this landscape
In this landscape, a record qualifies if it claims a solid-state, or all-solid-state, supercapacitor or solid-state capacitor architecture, combined with an advanced electrode or electrolyte material such as graphene electrodes, MXene-based materials, or solid electrolyte formulations. This combination is what separates the dataset from broader capacitor or battery patent searches. Records that mention only one half of that pairing, such as a generic solid electrolyte with no supercapacitor claim, are excluded.
The data shows a peak of 5 filings in 2018 and the same level again at the 2022 midpoint, rather than a steady climb. That pattern suggests an initial wave of research-driven filings that has not been followed by a second, commercially-driven wave. It is also worth remembering that publication typically lags filing by about 18 months, so the most recent one to two years in any such trend will always look thinner than they eventually turn out to be.
The tracked assignee set includes a public research council, a Chinese energy-storage manufacturer, a global automotive technology arm, a Japanese electronics IP holding company, and several smaller specialty filers. None of them show filing activity in the most recent year, and the total corpus of 25 families is too small to support a single dominant leader. This is a fragmented landscape rather than one with a clear incumbent to design around.
This filing, from the Council of Scientific & Industrial Research, discloses an all-solid-state supercapacitor built around an enhanced electrode-electrolyte interface, formed by intercalating a solid-state polymer electrolyte inside a conducting porous substrate coated with a charge-storage electrode material. Its stated advantages are higher specific and areal capacitance and lower internal resistance. Anyone building a similar intercalated polymer-electrolyte-into-porous-substrate structure should review this claim scope closely, since it is one of the more heavily cited records in the corpus.
The classification data shows the bulk of filings sitting in the core capacitor (H01G) and battery (H01M) classes, with only a handful of records in adjacent classes like condensation polymers, coating and surface deposition, and material analysis and testing. That thin density in the adjacent classes points to under-claimed ground in areas such as MXene electrode interface engineering and graphene coating deposition methods, though thin filing data should prompt a deeper prior-art check rather than an assumption of open space.
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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.