Pseudocapacitor Electrolyte Patent Snapshot 2026
The pseudocapacitor electrolyte patent space is tightly concentrated, with LG Energy Solution holding the largest share of the top-ranked filers and the field having peaked in 2019 with activity now sharply reduced. Engineers evaluating entry should weigh the low current competition against the possibility that foundational positions are already locked by a small number of corporate filers.
LG Energy Solution dominates a highly concentrated field
LG Energy Solution leads the applicant ranking by a wide margin, followed at distance by Aquion Energy and Intel. The top five filers together account for 83% of the combined total of the ranked applicants visible in this query, signaling a field where a handful of organizations have defined the IP perimeter.
The tier gap between the leader and the rest is substantial. No applicant momentum data is available for the current window, so trajectory comparisons between challengers cannot be confirmed from this evidence.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | LG Energy Solution Ltd. | 18 | |
| 2 | Aquion Energy Inc. | 5 | |
| 3 | Intel Corporation | 4 | |
| 4 | Robert Bosch GmbH | 3 | |
| 5 | ADA Technologies Inc. | 3 | |
| 6 | Skeleton Technologies Group OU | 2 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 7 | NANJING UNIV OF AERONAUTICS & ASTRONAUTICS | 1 | |
| 8 | Skeleton Technologies Group OU | 1 | |
| 9 | KOREA ADVANCED INST OF SCI & TECH | 1 | |
| 10 | LG Chem Ltd. | 1 | |
| 11 | Indian Institute of Technology Hyderabad | 1 |
LG Energy Solution’s visible position, reinforced by LG Chem as a related entity, suggests the LG group has built interlocking coverage across capacitor and battery cell classes. New entrants face a concentrated prior-art evidence snapshot before they can establish differentiated positions.
Filing counts for the most recent 18–24 months are subject to publication lag and may understate true recent activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2019 filing surge has not been sustained; capacitor-class filings dominate the technology mix
The annual trend and the IPC composition together tell a story of a field that burst into activity around 2019 and has since contracted, with the bulk of work concentrated in the H01G capacitor class.
Annual filing trend
Filings rose sharply to a 2019 peak and have returned to near-zero levels in subsequent years. Given normal publication lag, the most recent data points (2024–2025) should be read cautiously, but the sustained low count from 2020 through 2022 indicates a genuine contraction rather than a lag artifact alone.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01G (Capacitors) accounts for the visible share of technology records, with H01M (Batteries, cells and fuel cells) as the only other material branch. B23K (Welding/soldering), H02M (Power conversion), and H10D (Semiconductor devices) each appear at minimal levels, marking them as adjacent rather than core to the current corpus.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
High energy density hybrid pseudocapacitors and me…
A hybrid electrochemical energy storage device having the attributes of a high power supercapacitor and a lithium ion battery are described. The hybrid electrochemical energy storage device can be a pseudocapacitor with a cathode having a coated activated carbon powder having a coated activated carbon cathode. The coated activated carbon can provide for… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | High energy density hybrid pseudocapacitors and me… | 23 |
| 2 | Composite Anode Structure for Aqueous Electrolyte … | 13 |
| 3 | Pseudocapacitive conductive composite, composite i… | 9 |
| 4 | Aqueous electrolyte and a pseudocapacitor comprisi… | 7 |
| 5 | Aqueous electrolyte and pseudocapacitor comprising… | 6 |
| 6 | Composite anode structure for aqueous electrolyte … | 5 |
| 7 | Aqueous electrolyte and pseudocapacitor comprising… | 4 |
| 8 | Method of increasing an energy density and an achi… | 3 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
LG Energy Solution
LG Energy Solution holds 18 patent records, the largest position in the ranking by a significant margin. Its technology focus is concentrated entirely in H01G 11 (Capacitors), indicating a deliberate strategy to own the core capacitor-class coverage. Applicant momentum data is not available for the current window, so recent trajectory cannot be confirmed from this evidence.
patent records: 18Aquion Energy
Aquion Energy holds 5 patent records and is the only top-ranked applicant with material coverage across both H01G 11 (Capacitors) and H01M 12 and H01M 4 (Batteries and cells), reflecting its aqueous hybrid pseudocapacitor architecture. This dual-class footprint distinguishes it from the LG-group approach and covers the battery-interface aspects of the technology. Applicant momentum data is not available to assess recent trajectory.
patent records: 5Frequently asked questions
The corpus in scope contains 30 patent families. This is a small corpus, which means both that freedom-to-operate analysis is tractable and that the field has not attracted broad-based industrial investment.
LG Energy Solution leads the ranking with 18 patent records, well ahead of the next-ranked filer, Aquion Energy, with 5 patent records. The top five filers together account for 83% of the combined total among the ranked applicants visible in this query.
The United States leads with 15 patent records, followed by South Korea with 12 and Europe (EPO) with 8. China and WIPO PCT each have 2 records, and India has 1.
Annual filing activity peaked in 2019 and dropped sharply in subsequent years. Sporadic single filings appear in 2023 and 2025, but the field is in a decline stage by lifecycle assessment. Publication lag affects the most recent data points, but the multi-year low-activity pattern from 2020 onward indicates a genuine contraction.
H01G (Capacitors) is the visible IPC class with 40 patent records, followed by H01M (Batteries, cells and fuel cells) with 10. Three further classes — B23K, H02M, and H10D — each have only 1 record, placing them in the adjacent and sparse category.
Three adjacent branches show only 1 patent record each: B23K (Welding/soldering/brazing), H02M (Power conversion), and H10D (Semiconductor devices). These represent sparsely covered technical interfaces rather than confirmed commercial gaps, and their value depends on whether a filer can establish a technically defensible link between electrolyte chemistry and these downstream application classes.
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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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