Supercapacitor Electrolyte Patents: Top Companies & Trends 2026
A data-backed look at supercapacitor electrolyte patents: who leads filings, how the technology composition breaks down, and where claim space remains open through 2026.
Filing growth = 2021 (45 records) → 2024 (41); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 815 records in scope (CR5), not the ranked leaders only.
What the supercapacitor electrolyte patent record shows
The scope covers 815 published records filed against IPC class H01G11, spanning 2015 through the 2026 cut-off. Filing activity is anchored by a small set of repeat filers at the top of the ranking, but the bulk of the 100 ranked assignees appear only once or twice — a shape typical of a field where the core electrolyte chemistry is contested rather than settled. Electrolyte formulation claims sit alongside a substantial overlap with battery-cell IPC classes, reflecting how supercapacitor and battery electrode/electrolyte work increasingly share inventors and assignees.
Recent filing years are always undercounted at the point of measurement because publication lags filing by roughly 18 months; treat 2025 and 2026 figures as provisional rather than as evidence of a slowdown.
Filing concentration, technology mix and geography
Three views of the same 815-record set: who files, what they claim it under, and where they seek protection.
Filing trend: a 2017 peak, then a plateau
Filings rose to a peak of 103 in 2017 and have settled lower since; comparing the two most recent complete years, 2021 (45) to 2024 (41) shows a 9% decline — a mild pull-back from an early peak rather than a field in decline, given that later years are still filling in.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
Technology composition: concentrated in capacitors, spilling into batteries
Every record carries H01G by definition of the search scope; a quarter of records (204 of 815) also carry H01M, the battery/cell classification, and smaller but consistent shares sit in inorganic compounds (C01B), nanotechnology (B82Y) and conductor/insulator classes — evidence that electrolyte innovation is being claimed jointly with adjacent cell and materials work rather than in isolation.
Shares are the percentage of the 815 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Supercapacitor Electrolyte Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about supercapacitor electrolyte patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
Electronic battery with nano-composite (US20130078515A1)
Describes a supercapacitor-like electronic battery built on a conventional electrochemical capacitor structure, with nanocomposite electrodes carrying nano-scale conductive particles coated with a functionalised organic or organometallic compound, dispersed within an electrolyte matrix that separates the two electrodes.Filed 2013-03-28; assignee and family details rendered in the table above.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6762926B1 | Supercapacitor with high energy density | 119 |
| 2 | US20060154071A1 | Carbon fine powder coated with metal oxide, metal nitride or metal carbide, process for producing the sdame, … | 112 |
| 3 | US5811205A | Bifunctional electrode for an electrochemical cell or a supercapacitor and a method of producing it | 104 |
| 4 | US20040202934A1 | Li4Ti5O12, Li(4-alpha)Zalpha Ti5O12 or Li4ZbetaTi(5-beta)O12 particles, processes for obtaining same and use … | 97 |
| 5 | US20160261005A1 | Electrochemical devices comprising compressed gas solvent electrolytes | 73 |
| 6 | US6510043B1 | Cylindrical high voltage supercapacitor having two separators | 71 |
| 7 | WO2008034939A1 | Functionalized cellulose – carbon nanotube nanocomposites and hybride materials | 69 |
| 8 | US20150103469A1 | Interlayer distance controlled graphene, supercapacitor and method of producing the same | 63 |
| 9 | US20060263688A1 | Method of producing electrode composite material | 61 |
| 10 | US20130078510A1 | Core-shell nanoparticles in electronic battery applications | 59 |
Citation counts reward older filings that have had more time to accumulate citations within this searched corpus; read them as a signal of influence on later filings, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Four read-throughs of the assignee, trend and geography data that matter for a filing or freedom-to-operate decision.
Leadership is real but not dominant
The top 5 assignees combined account for 18.8% of all 815 records, and the top 10 combined reach 29.7%. That leaves over two-thirds of filing activity spread across a long tail of the remaining ranked companies, most of which appear only a handful of times.
Past a filing peak, not past relevance
Filings peaked at 103 in 2017 and the most recent complete comparison, 2021 to 2024, shows a 9% decline (45 to 41). That is a plateau after an early surge, not an exit signal — especially since 2025-26 figures are still incomplete due to publication lag.
Electrolyte claims lean on battery chemistry
A quarter of the 815 records carry the H01M battery/cell classification alongside H01G, and smaller shares extend into inorganic compounds, nanomaterials and conductor/insulator classes. Electrolyte formulation work is rarely claimed in isolation from cell architecture.
US and Europe dominate, PCT and India follow
The United States receives the largest single share of filings at 370, ahead of the EPO at 104 and WIPO/PCT filings at 84. India's 80 filings and China's 41 point to growing but still secondary activity relative to the US and European offices.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to supercapacitor electrolyte patent landscape, with the prior art for and against each one.
Turning this landscape into a filing decision
The ranking and trend data narrow down where to look next; the next steps depend on whether the question is who to watch, what to avoid, or where to file.
Map the leader's full claim set
The top assignee holds 48 of 815 records — enough to warrant a claim-by-claim review before filing anything adjacent to its core electrolyte chemistry.
Explore assignee portfolios in EurekaTest white space in under-claimed classes
Classes like C08G and H01B carry meaningful but modest record counts, suggesting formulation and conductor-interface angles that are not yet crowded.
Run a white-space search in EurekaWatch the 2024 filing plateau
The 9% pull-back from 2021 to 2024 is mild; confirm whether it holds once 2025-26 publications catch up before reading it as a trend.
Track filing trends in EurekaCommon questions about supercapacitor electrolyte patents
The ranked leader among the 100 companies in this dataset holds 48 of the 815 records in scope, well ahead of the fifth-placed company at 20 and the tenth-placed at 16. The top 5 assignees combined account for 18.8% of all records, and the top 10 combined reach 29.7%, which leaves most of the remaining activity spread across a long tail of single- or few-filing entrants. That shape means no single company controls the field outright, but a handful of repeat filers do shape the core prior art that later applicants have to design around.
Filings peaked in 2017 at 103 and have since settled to a lower plateau; comparing the two most recent complete years, 2021 (45) and 2024 (41), shows a 9% decline over that span. That is a mild pull-back rather than a collapse, and it should not be read as the field losing relevance. Because publication lags filing by roughly 18 months, the 2025 and 2026 figures in any dataset like this are still incomplete and will rise as more records publish.
A quarter of the 815 records in this scope — 204 records — also carry the H01M classification used for batteries, cells and fuel cells, indicating that electrolyte innovation is frequently claimed alongside cell architecture rather than as a standalone chemistry. Smaller but consistent overlaps also appear with inorganic compound classifications (C01B, 5.9%) and nanotechnology applications (B82Y, 3.9%). Anyone searching this space for freedom-to-operate purposes should check adjacent battery-electrolyte filings, not just pure capacitor classifications.
The United States receives the largest share of filings in this dataset at 370, followed by the European Patent Office at 104 and WIPO/PCT filings at 84. India (80) and China (41) trail behind, with Germany at 33. This distribution suggests the US and Europe remain the primary commercial battlegrounds for supercapacitor electrolyte protection, while India's filing volume is notable relative to China's given the field's overall size.
Citation counts inside a searched corpus like this one tend to favour older filings simply because they have had more years to accumulate citations, so a high count signals influence on later work rather than current commercial importance. The most-cited record in this dataset, US6762926B1, describes a supercapacitor with high energy density and has been cited 119 times. Treat these citation leaders as foundational prior art to review during drafting, not as a shortlist of the technologies most likely to matter going forward.
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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.