Hybrid Supercapacitor Current Collector Patent Snapshot
The hybrid supercapacitor current collector patent space is highly concentrated, with SAFT Group and the French Alternative Energies and Atomic Energy Commission (CEA) together accounting for the majority of activity among a small corpus of 9 patent families. Filing volume peaked in 2017–2018 and has been sparse since, suggesting a niche field that remains technically open despite limited but sustained interest from a handful of institutional actors.
SAFT Group leads a tightly held, low-volume niche
SAFT Group is the clear leader, holding 6 patent records — the largest single-applicant share among the top hundred filers. CEA follows closely with 5 patent records, making the top two applicants together the visible force in this field.
The top five filers account for 79% of the ranked applicants visible in this query’ combined total, a concentration level that is unusually high even for an emerging niche. The tier gap between SAFT Group and all other applicants is narrow only because the absolute corpus is small; meaningful second-tier competition has not yet materialized.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | SAFT Group | 6 | |
| 2 | French Alternative Energies and Atomic Energy Commission (CEA) | 5 | |
| 3 | Mancevski Alexander Graziani | 2 | |
| 4 | Research Institute of Tsinghua University in Shenzhen | 1 | |
| 5 | Shenzhen Institute of Advanced Technology | 1 | |
| 6 | Zneng Ruixin (Xiamen) Energy Storage Technology Co., Ltd. | 1 | |
| 7 | Tsinghua University | 1 | |
| 8 | National Institute of Technology Kurukshetra | 1 | |
| 9 | University of Chinese Academy of Sciences | 1 |
The positions of SAFT Group and CEA — both French institutions with strong electrochemical engineering traditions — imply that foundational current-collector architectures for hybrid supercapacitors are largely controlled by European incumbents, leaving room for entrants from Asia and North America who are only beginning to appear.
The most recent filing years are subject to publication lag and likely undercount activity; conclusions about very recent momentum should be treated as provisional. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity peaked in 2017–2018 and the technology mix is capacitor-dominant
The annual filing trend and technology composition charts together reveal a field that generated its primary output in 2017–2018, went quiet for several years, and shows only isolated signals of renewed interest. The IPC class distribution confirms that capacitor engineering (H01G) is the overwhelmingly visible technical route.
Annual filing trend
Filings peaked at 4 patent families in 2017 and 2 in 2018, then fell to zero for four consecutive years (2019–2022). A single record appeared in 2023, and 2 records appear in 2025, though those recent years are subject to publication lag and should not be read as a confirmed recovery. The overall pattern is consistent with an early burst of foundational IP followed by a long quiet period.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01G (Capacitors) accounts for 20 patent records — the visible branch — followed by H01M (Batteries, cells and fuel cells) at 8 records, reflecting the hybrid nature of the devices. C01G (Compounds of other metals) represents only 1 patent record, marking it as a distinctly sparse adjacent branch. All applicants in the corpus share H01G 11 as their primary IPC focus.
↗ 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.
Method for the production of a cylindrical hybrid …
The invention relates to a process for the preparation of a cylindrical alkali metal-ion hybrid supercapacitor and to a cylindrical alkali metal-ion hybrid supercapacitor obtained according to said process. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Electrochemical supercapacitor device made from an… | 16 |
| 2 | supercapacitor | 14 |
| 3 | Electrochemical cell, energy storage system and ve… | 8 |
| 4 | Ultrathin Asymmetric Nanoporous-Nickel Graphene-Co… | 4 |
| 5 | Asymmetric supercapacitor with alkaline electrolyt… | 4 |
| 6 | Electrochemical supercapacitor device made from an… | 2 |
| 7 | 金属导电材料用作镧离子混合超级电容器负极、镧离子混合超级电容器及其制备方法 | 1 |
| 8 | Supercapacitor | 1 |
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.
SAFT Group
SAFT Group holds 6 patent records — the largest portfolio in the corpus — split evenly across H01G 11 (Capacitors, 6 records) and H01M 12 (Batteries and fuel cells, 6 records), confirming deep coverage of the hybrid interface. No momentum trend data is available from the evidence base for SAFT Group, so trajectory beyond its established position cannot be characterized. Its dual H01G–H01M emphasis suggests a focus on full-cell current-collector integration rather than isolated electrode components.
patent records: 6CEA
CEA holds 5 patent records concentrated in H01G 11 (5 records), with minor entries in H01M 10 and H01M 12 (1 record each), indicating a capacitor-first technical orientation relative to SAFT Group’s more balanced hybrid approach. No momentum trend is available from the evidence base for CEA. Tsinghua University is the only applicant with a recorded momentum signal — flagged as a new entrant — but its 1-record base means its challenge to the top two is nascent at best.
patent records: 5Frequently asked questions
The corpus reviewed contains 9 patent families. This is a small, niche corpus — by comparison most active energy-storage sub-fields contain hundreds to thousands of families — reflecting the specificity of the current-collector function within hybrid supercapacitor devices.
SAFT Group is the leading applicant with 6 patent records, followed by CEA with 5 patent records. Both are French institutions. Together they represent the overwhelming majority of documented IP in the corpus.
Filing activity peaked in 2017 with 4 patent families and in 2018 with 2 patent families. The field then went silent from 2019 through 2022. A single record appeared in 2023 and 2 records appear attributed to 2025, though recent years are subject to publication lag and their significance is uncertain.
The United States is the primary filing jurisdiction with 8 patent records, followed by China and Europe (EPO) with 3 records each, and Canada and Germany with 2 records each. Any freedom-to-operate assessment should prioritize the US, followed by EPO-designated countries and China.
Tsinghua University is flagged in the evidence as a new entrant with 1 recent patent record. The Research Institute of Tsinghua University in Shenzhen and Shenzhen Institute of Advanced Technology are also present with 1 record each, suggesting growing Chinese academic interest, though all start from very small bases.
C01G (Compounds of other metals) has only 1 patent record in the corpus, representing the sparsest adjacent branch. Metal-compound materials are relevant to pseudocapacitive current-collector coatings, and the low filing count means prior-art density in this sub-area is minimal — though any entrant would still need to confirm freedom to operate relative to the existing SAFT Group and CEA portfolios.
Built on Patsnap Open Platform
This report’s underlying patent dataset — filings, assignees, technology clusters — is open for developers via MCP and REST API. Free to start, 10,000 credits, no credit card required.
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.