Asymmetric Supercapacitor Electrolyte Patents: Leaders & White Space 2026
- 28 families, no runaway leader. Filing sits at a flat-to-declining pace since a 2024 peak of 4, with no assignee showing sustained multi-year momentum into the latest year.
- United States dominates filing venue. 13 of the tracked records were filed at the US receiving office, more than double China's 5, shaping where enforcement risk actually concentrates.
- Citations cluster on two aqueous-electrolyte families. A pair of Chinese aqueous-electrolyte applications and a Bosch-linked non-lithium salt disclosure account for the heaviest citation counts in the set, marking the prior art any new filing must design around.
What this patent landscape covers
This landscape tracks asymmetric supercapacitor electrolyte patent families filed against wide-voltage, aqueous, neutral or high-voltage electrolyte claims within the core capacitor IPC group H01G11/58, /62 and /64. The dataset spans 2015 to 2026 and totals 28 published families, a small enough pool that individual filings materially shift the picture rather than blending into noise.
Filing activity touches adjacent fields including batteries and cells, engine starting systems, and even diagnosis and surgery, reflecting how electrolyte chemistry claims get pulled into hybrid energy-storage and biomedical capacitor applications. Publication typically lags filing by around 18 months, so the apparent slowdown into the most recent year is partly a reporting artefact rather than a confirmed drop in activity.
Filing trend and technology composition
Twenty-eight families is a small corpus, so year-to-year swings should be read as directional signals rather than statistically robust trend lines.
A flat, low-volume filing trend
Filings opened at 3 in 2017, rose to a peak of 4 in 2024, and sat at a midpoint of 2 in 2022 — a pattern consistent with a niche electrolyte-chemistry claim space rather than one experiencing a filing surge. The 2026 figure of 0 reflects the data cut-off, not a stop in activity.
Capacitor claims dominate, with spillover into batteries and engine systems
All 28 records classify under H01G capacitors, the anchor subclass for this search. Secondary classification in H01M batteries and cells (4 records) and F02N engine starting (2 records) shows electrolyte claims being reused across hybrid energy-storage and automotive starting-module contexts, while single-digit counts in nanotechnology, metal compounds, heterocyclic compounds and cabling point to occasional cross-disciplinary filings rather than an established secondary claim front.
Shares are the percentage of the 28 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Asymmetric Supercapacitor Electrolyte with Eureka
This page is one run against one query. Ask Eureka your own question about asymmetric supercapacitor electrolyte and every answer comes back with the patent numbers behind it.
Try EurekaThe prior art shaping new claims
US10381169B2 — Aqueous electrolyte, use of the electrolyte and hybrid supercapacitor containing the electrolyte
An aqueous electrolyte for a capacitor contains at least one transition metal complex. The electrolyte can be used in a supercapacitor, a pseudocapacitor, or a hybrid supercapacitor, and a hybrid supercapacitor built with it is also claimed.Filed by Robert Bosch GmbH, granted 2019-08-13.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN110060883A | 一种水系电解液及其应用 | 20 |
| 2 | US20160071658A1 | Electrochemical supercapacitor device made from an electrolyte comprising, as a conductive salt, at least one… | 16 |
| 3 | US20160268058A1 | Nickel supercapacitor engine starting module | 10 |
| 4 | CN110060882A | 一种水系电解液及其应用 | 7 |
| 5 | US20100195268A1 | Hybrid supercapacitor using transition metal oxide aerogel | 4 |
| 6 | CN110120309A | 一种水系电解液及其应用 | 3 |
| 7 | WO2018054591A1 | Aqueous electrolyte for a capacitor, use of the electrolyte and capacitor containing the electrolyte | 2 |
| 8 | US20170250034A1 | Aqueous Electrolyte, Use of the Electrolyte and Hybrid Supercapacitor Containing the Electrolyte | 2 |
| 9 | US9666379B2 | Nickel supercapacitor engine starting module | 2 |
| 10 | US9773620B2 | Electrochemical supercapacitor device made from an electrolyte comprising, as a conductive salt, at least one… | 2 |
Citation counts are drawn from a searched corpus that favours older filings; treat them as a measure of influence on later applicants, 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.
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Browse MCP servers →What the data means for filing strategy
The size and shape of this dataset point to a claim space that is occupied at its core but has not been fought over at volume.
Volume has never accelerated
With a midpoint of 2 families in 2022 and a peak of only 4 in 2024, this is a low-volume claim space. No single year shows the kind of jump that signals a competitive land grab, which suggests remaining white space has not yet attracted concentrated filing pressure.
Enforcement risk sits mostly in the US
Nearly half of all tracked filings went through the US receiving office, well ahead of China's 5 and India's 3. Freedom-to-operate work should weight US prior art and prosecution history most heavily, even where target manufacturing sits elsewhere.
Two aqueous-electrolyte families anchor the prior art
The most-cited record, a Chinese aqueous electrolyte application cited 20 times, sits alongside a related sibling filing and a Bosch-linked non-lithium salt disclosure cited 16 times. New aqueous-electrolyte claims are likely to be examined against this small cluster first.
Electrolyte claims travel into adjacent hardware
Beyond core capacitor classification, electrolyte-chemistry claims recur in battery and cell filings and in engine-starting modules, indicating that hybrid supercapacitor electrolyte work is often filed as part of a broader energy-storage or automotive system rather than standalone.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to asymmetric supercapacitor electrolyte, with the prior art for and against each one.
Assignee landscape: no dominant filer, several dormant leads
With 28 families spread across a wide set of assignees and only one co-assignee pair recorded, this field lacks a clear incumbent. Recent-year momentum data shows several previously active organisations, including a national atomic energy body, a Saudi petroleum and minerals university, Bosch, and a Chinese academy institute, all recording zero filings in the latest tracked year.
Several prior filers have gone quiet
Organisations including a national atomic energy commission, a Saudi petroleum and minerals university, and a Chinese academy institute all show zero filings in the most recent year, several with a full year-over-year drop. This is consistent with a field where individual assignees file in short bursts rather than sustaining programmes.
Joint filing is rare here
Only one co-assignee pairing appears in the dataset, linking a Chinese rail-transit new-energy technology company with a university research partner. The near-absence of joint filings suggests most work in this space is done and claimed by single organisations.
Filing venue is US-led but geographically spread
Beyond the US, China and India, smaller counts at the EPO, Germany and Spain show this is an internationally distributed field rather than one concentrated in a single jurisdiction's patent office.
| Assignee | Recent year | YoY |
|---|---|---|
| French Alternative Energies and Atomic Energy Commission (CEA) | 0 | — |
| King Fahd University of Petroleum and Minerals | 0 | -100% |
| Robert Bosch GmbH | 0 | — |
| Technical Institute of Physics and Chemistry, Chinese Academy of Sciences | 0 | — |
| SAFT AMERICA INC | 0 | — |
| PONDICHERRY UNIVERSITY | 0 | — |
| King Abdullah University of Science and Technology (KAUST) | 0 | — |
| Southwest Jiaotong University | 0 | — |
Where to take this analysis
This landscape identifies where claim density sits today; the next steps depend on whether the goal is freedom-to-operate, white space drafting, or monitoring a specific assignee.
Check freedom-to-operate against the top-cited cluster
The two most-cited aqueous-electrolyte families and the Bosch non-lithium salt disclosure are the prior art most new filings will be measured against. Run a focused claim-chart comparison before drafting.
Explore prior art in EurekaTrack dormant assignees for re-entry
Several organisations with prior filings show zero activity in the latest year. A re-filing or continuation from any of them would be an early signal worth monitoring.
Set up assignee tracking in EurekaDraft around the identified white space
Neutral-pH gel electrolytes and non-lithium conductive salt formulations show thin direct coverage in this dataset relative to adjacent branches, making them candidates for first-claim drafting.
Analyse white space in EurekaCommon questions on asymmetric supercapacitor electrolyte patents
This dataset tracks 28 patent families published between 2015 and 2026 under a search combining asymmetric and hybrid supercapacitor terms with wide-voltage, aqueous, neutral and high-voltage electrolyte language, restricted to the core capacitor IPC subclasses H01G11/58, /62 and /64. That is a small, tightly scoped corpus compared with broader battery-electrolyte searches, reflecting how specific this claim intersection is. Because publication lags filing by roughly 18 months, the true count of recent filings is likely somewhat higher than currently visible.
No single assignee dominates this dataset; filing is spread across universities, research institutes and a handful of industrial players including Robert Bosch, with most organisations showing only sporadic activity. Recent-year momentum data shows several previously active filers, including a national atomic energy commission and a Saudi petroleum and minerals university, recording zero filings in the latest tracked year. This pattern points to a field driven by episodic research output rather than sustained corporate patent programmes.
The United States receiving office accounts for 13 of the 28 tracked filings, more than double the next largest venue, China, at 5. India, the EPO, Germany and Spain make up smaller shares. Anyone assessing freedom-to-operate risk in this space should prioritise US prior art and prosecution history, since that is where the bulk of examined claims sit.
Beyond the core H01G capacitor classification that covers all 28 records, electrolyte claims recur in H01M batteries and cells, F02N engine starting systems, and in smaller numbers across nanotechnology, metal compounds, heterocyclic compounds and cable insulation. This spillover shows that aqueous and wide-voltage electrolyte chemistry is often claimed as part of a larger hybrid energy-storage or automotive system rather than as a standalone invention.
The most heavily cited records in this dataset are two related Chinese aqueous electrolyte applications, one cited 20 times and a sibling cited 7 times, along with a non-lithium conductive salt disclosure cited 16 times and a nickel supercapacitor engine-starting module cited 10 times. These form the densest prior-art cluster and should be the starting point for any claim-chart comparison, though citation counts in this corpus favour older filings and should be weighed against more recent disclosures too.
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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.