Supercapacitor Electrolyte Patents: Top Companies & Trends 2026
Supercapacitor Electrolyte and Voltage Window Patents
Filings peaked in 2017 at 204 and 2021-2024 volume fell 37%, from 128 to 81 — though 2025-2026 figures are still filling in due to publication lag. Filings hit 204 in 2017, the high point of the series. Comparing the last two complete years available, 2021 (128) to 2024 (81) shows a 37% decline — a genuine cooling in filing pace, not an artefact of publication lag, since both years are past the lag window. 2025 and 2026 figures will rise as later publications catch up, so they should not be read as confirming a continued drop.
- 1HONEYCOMB BATTERY CO6.9%
- 2RGT UNIV OF CALIFORNIA5.0%
- 3NANOTEK INSTR GRP LLC3.0%
- 4COMMONWEALTH SCI & IND RES ORG2.8%
- 5SUSTAINABLE ENERGY TECHNOLOGIES INC2.7%
See the full supercapacitor electrolytes and voltage window analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most patents on supercapacitor electrolytes?
One assignee leads the ranked field with 153 records, well ahead of the fifth-ranked assignee at 59 and the tenth-ranked at 41. The top 5 assignees combined account for 20.4% of all 2,210 records in scope, and the top 10 account for 31.0%. That leaves the majority of filings spread across a long tail of smaller and single-filing entities, so no one company controls the claim space outright.
Is patent filing in supercapacitor electrolytes growing or slowing down?
Filing peaked in 2017 at 204 records and has since declined; comparing the last two complete years, 2021 (128) and 2024 (81), shows a 37% drop. This is a genuine pullback rather than a data artefact, because both years are far enough back to have finished publishing. Figures for 2025 and 2026 will still revise upward as publications catch up, since publication typically lags filing by about 18 months.
What is the difference between ionic liquid electrolytes and acetonitrile-based electrolytes in these patents?
Acetonitrile is the conventional high-conductivity solvent for supercapacitor electrolytes but carries flammability and toxicity concerns, which is why acetonitrile alternatives appear as a distinct search term in this landscape. Ionic liquid electrolytes are one of the main alternative routes claimed, valued for wider electrochemical stability windows and lower volatility, though often at the cost of conductivity at low temperature. The representative 2026 filing in this dataset, a spiro-based ionic liquid electrolyte aimed specifically at low-temperature performance, illustrates how recent claims are trying to close that conductivity gap.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Supercapacitor Electrolytes and Voltage Window covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.