Dual-Ion Battery Patent Landscape 2026
Dual-Ion Battery Patent Landscape in 2026
Dual-ion battery IP is in a growth phase, with Chinese research institutes dominating a moderately concentrated field. The Shenzhen Institute of Advanced Technology leads outright, and China accounts for the majority of filing activity, while the technology mix remains anchored in core cell chemistry with several adjacent branches sparsely covered.
Chinese research institutes lead a moderately concentrated field
The Shenzhen Institute of Advanced Technology holds the top position with 21 patent families, ahead of the Changchun Institute of Applied Chemistry Chinese Academy of Sciences at 12 and Toyota Motor Corporation at 8. The top five filers collectively account for 23% of the combined output of the hundred largest filers, indicating moderate concentration with meaningful room for challengers.
A clear tier gap separates the top two Chinese academy institutes from the third-ranked Toyota Motor Corporation and the cluster of applicants at four to six patent families. Below that cluster, the field disperses across a long tail of universities and early-stage companies, suggesting the competitive structure has not yet consolidated around a small set of dominant incumbents.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | 21 | |
| 2 | Changchun Institute of Applied Chemistry, Chinese Academy of Sciences | 12 | |
| 3 | Toyota Motor Corporation | 8 | |
| 4 | Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | 7 | |
| 5 | Real Power Industrial Ltd. | 6 | |
| 6 | Jilin University | 5 | |
| 7 | Zhongqi Xinneng (Tianjin) Battery Technology Co., Ltd. | 5 | |
| 8 | QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINES… | 4 | |
| 9 | Hunt Energy Enterprises LLC | 4 | |
| 10 | P&D PROJECTS BVBA | 4 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | National Institute of Advanced Industrial Science and Technology (AIST) | 4 | |
| 12 | Audere AG | 4 | |
| 13 | Teikoku Piston Ring Co., Ltd. | 4 | |
| 14 | Microsoft Technology Licensing LLC | 4 | |
| 15 | Max Planck Society for the Advancement of Science | 4 | |
| 16 | Xiamen University | 3 | |
| 17 | South China University of Technology Zhuhai Institute of Modern Industrial Innovation | 3 | |
| 18 | Sun Yat-sen University | 3 | |
| 19 | NTT Inc. | 3 | |
| 20 | Contemporary Amperex Technology (Hong Kong) Limited | 3 |
The leading positions of academy-linked institutes rather than vertically integrated manufacturers implies that core dual-ion battery IP remains close to the research frontier. Commercial players such as Toyota Motor Corporation and Contemporary Amperex Technology are present but have not yet matched the publication volume of the academic leaders, leaving the IP landscape open to industrial entrants who can translate academic insights into product-oriented filings.
The most recent 18 to 24 months of filings are subject to publication lag and will undercount true activity; the figures presented reflect families published at the time of analysis. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity is rising and core cell chemistry dominates the technology mix
The annual trend chart shows how filing volume has evolved year by year, while the technology composition chart reveals how activity is distributed across IPC classes. Together they indicate a field still expanding in volume but heavily concentrated in a single technical domain.
Annual filing trend
Annual filings grew from 16 families in 2017 to a recorded peak of 44 in 2024, representing 89% growth over the recent window. The 2025 and 2026 figures are substantially understated due to publication lag and should not be interpreted as a slowdown; the field’s lifecycle stage is confirmed as Growth.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells and fuel cells) dominates the IPC mix by a wide margin, reflecting the field’s tight focus on core electrochemical cell design. C01B (Non-metallic elements and inorganic compounds) and B82Y (Nanotechnology applications) are the next largest classes but each represent a small share of activity, and several other classes — including H01G (Capacitors), C01G (Compounds of other metals), and polymer-related classes — each carry only a handful of records, pointing to sparse coverage in adjacent technical areas.
↗ 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.
3D Electrode Design for a High Specific-capacity A…
An aluminum electrode can include gel polymer as the binder, which can be combined with a carbon electrode to form a dual-ion battery. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 钾基双离子电池及其制备方法 | 37 |
| 2 | 电解液、钠离子二次电池及其制备方法 | 34 |
| 3 | Aqueous rechargeable dual-ion battery | 33 |
| 4 | 锌基双离子电池及其制备方法 | 32 |
| 5 | 一种钠基双离子电池及其制备方法 | 30 |
| 6 | 有机凝胶聚合物电解液、制备方法、应用、钠基双离子电池及其制备方法 | 30 |
| 7 | 有机凝胶聚合物电解液、制备方法、应用、钠基双离子电池及其制备方法 | 27 |
| 8 | 钠基双离子电池及其制备方法 | 23 |
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.
What the IP structure means for R&D investment decisions
The combination of a growth-stage lifecycle, academic-led concentration, emerging industry collaboration, and. China-heavy geography frames both the opportunity and the risk for new entrants and existing players.
Growth stage: annual volume still climbing
The field is classified as Growth, with annual filings rising from 16 families in 2017 to 44 in 2024 and 89% growth over the recent multi-year window. The lifecycle assessment notes that the most recent years are understated by publication lag, so the upward trajectory is likely stronger than current counts show. Entering now still allows a filer to establish a meaningful position before the field consolidates.
Growth stageModerate concentration with a fragmented challenger tier
The top five filers hold 23% of the hundred largest filers’ combined output, and a long tail of universities and small companies fills the remainder. This structure means no single entity exercises dominant IP control, but the Shenzhen Institute of Advanced Technology’s 21-family lead gives it notable citation leverage. A targeted filing program in under-covered sub-domains could quickly move a new entrant into a top-ten position.
Moderate concentrationEarly-stage co-filing between institutes and industry
The most active co-filing pairs are the Shenzhen Institute of Advanced Technology with Sichuan Zhongke Ruineng Industrial (2 joint families) and Zhongqi Xinneng (Tianjin) Battery Technology with Tianjin Lishen Battery (2 joint families). A third pair links the Shenzhen Institute of Advanced Technology with the University of Chinese Academy of Sciences. These collaborations signal early academy-to-industry technology transfer, but the ecosystem remains nascent and most applicants file independently.
Nascent ecosystemChina-dominant filing with limited international protection
China accounts for 146 patent records, far ahead of the United States at 35 and WIPO PCT at 26. Japan and Europe each carry fewer than a dozen records. This concentration means most dual-ion battery IP is protected only in China, leaving significant freedom to operate in US, European, and Japanese markets for applicants willing to file internationally. PCT filings at 26 records suggest some players are beginning to extend protection globally, but international coverage remains thin relative to the volume of Chinese filings.
China-dominantGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | Sichuan Zhongke Ruineng Industrial Co., Ltd. | 2 |
| Zhongqi Xinneng (Tianjin) Battery Technology Co., Ltd. | Tianjin Lishen Battery Co., Ltd. | 2 |
| Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | University of Chinese Academy of Sciences | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Shenzhen Institute of Advanced Technology leads; Changchun Institute of Applied Chemistry is the primary challenger
Both leaders are Chinese Academy of Sciences-affiliated institutes with filings concentrated in core H01M cell and electrode chemistry. Toyota Motor Corporation is the highest-ranked non-Chinese filer and the only major automaker with a meaningful position.
Shenzhen Institute of Advanced Technology
The leader holds 21 patent families, with technology emphasis on H01M 10 (20 records) and H01M 4 (12 records), covering cell design and electrode materials, plus a smaller position in C01B 32 non-metallic compounds. Momentum for the filing entity tracked as a new entrant in the recent window, reflecting reorganization or reclassification of its affiliated entities rather than a decline in institutional output.
families: 21Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
The challenger holds 12 patent families, focused tightly on H01M 10 cell design (12 records) and H01M 4 electrode materials (2 records), with no significant diversification into adjacent classes. Momentum trend is new entrant in the recent period, consistent with a recently accelerated publication program. Its narrower but deep focus on core cell architecture makes it a key reference point for electrolyte and electrode system design.
families: 12| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | 2 | ▲ new entrant |
| Changchun Institute of Applied Chemistry, Chinese Academy of Sciences | 7 | ▲ new entrant |
| Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | 4 | ▲ new entrant |
| Jilin University | 5 | ▲ new entrant |
| Zhongqi Xinneng (Tianjin) Battery Technology Co., Ltd. | 5 | ▲ new entrant |
| Max Planck Society for the Advancement of Science | 1 | ▲ new entrant |
| Microsoft Technology Licensing LLC | 4 | ▲ new entrant |
| Anhui Normal University | 3 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Several IPC classes appear in the dual-ion battery corpus with low coverage relative to the dominant H01M class. These represent observations of relative sparsity; technical value and entry feasibility vary by branch.
B82Y · Nanotechnology applications
With only 12 patent records and a 4% share of the corpus, nanotechnology approaches to dual-ion battery electrodes and electrolytes remain sparsely documented. Nano-structured carbon anodes and nano-composite cathode materials have demonstrated performance benefits in adjacent battery chemistries; the thin prior-art base in this class could offer a realistic entry path for groups with existing nanomaterials capabilities, particularly given that the top-cited patents in this field reference carbon-based anode materials.
Search this in Eureka →H01G · Capacitors
The H01G class, covering capacitors and supercapacitor-adjacent architectures, has only 9 patent records in the corpus, representing 3% of coverage. Dual-ion cells that hybridize capacitive and faradaic storage mechanisms sit at the intersection of battery and capacitor design; this branch is sparse enough that a focused filing program targeting hybrid cell architectures could establish a differentiated position, provided the applicant has prior art in capacitor electrode design.
Search this in Eureka →How leaders differ by technology route
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | C01B 32 · Non-metallic elements & inorganic compounds | B82Y 30 · Nanotechnology applications |
|---|---|---|---|---|---|
| Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | Strong · 20 | Strong · 12 | Absent | Emerging · 2 | Absent |
| Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | Strong · 6 | Strong · 6 | Absent | Moderate · 3 | Emerging · 1 |
| Sichuan Zhongke Ruineng Industrial Co., Ltd. | Strong · 6 | Strong · 5 | Absent | Emerging · 1 | Emerging · 1 |
| Changchun Institute of Applied Chemistry, Chinese Academy of Sciences | Strong · 12 | Absent | Absent | Absent | Absent |
| Toyota Motor Engineering & Manufacturing North America, Inc. | Strong · 6 | Strong · 4 | Absent | Absent | Absent |
| Zhongqi Xinneng (Tianjin) Battery Technology Co., Ltd. | Strong · 5 | Strong · 5 | Absent | Absent | Absent |
| Jilin University | Strong · 5 | Strong · 4 | Absent | Absent | Absent |
Frequently asked questions
The corpus contains 229 patent families in scope at the time of analysis. The most recent 18 to 24 months are subject to publication lag and will undercount true activity.
The Shenzhen Institute of Advanced Technology holds the top position with 21 patent families, ahead of the Changchun Institute of Applied Chemistry Chinese Academy of Sciences at 12 and Toyota Motor Corporation at 8.
The field is classified as Growth. Annual filings rose from 16 families in 2017 to 44 in 2024, representing 89% growth over the recent multi-year window. The 2025 and 2026 counts are understated by publication lag and do not indicate a reversal of this trend.
China leads with 146 patent records, followed by the United States at 35, WIPO PCT at 26, Japan at 11, and Europe at 8. Most dual-ion battery IP is currently protected only in China, leaving considerable freedom to operate in other major markets.
H01M (Batteries, cells and fuel cells) dominates the IPC mix. Adjacent classes with sparse coverage include C01B Non-metallic elements and inorganic compounds at 20 records, B82Y Nanotechnology applications at 12, H01G Capacitors at 9, C01G Compounds of other metals at 6, and several polymer-related classes each carrying fewer than 7 records.
Co-filing activity is present but limited. The most active pairs are the Shenzhen Institute of Advanced Technology with Sichuan Zhongke Ruineng Industrial (2 joint families) and Zhongqi Xinneng (Tianjin) Battery Technology with Tianjin Lishen Battery (2 joint families). The ecosystem remains nascent, with most applicants filing independently.
Ready to map your own dual-ion battery patent landscape?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
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.