Solid-State Battery Binder Patent Landscape 2026
Solid-State Battery Binder Patent Landscape in 2026
The solid-state battery binder space is a nascent but accelerating field: filings are still rising on a multi-year basis, with Asahi Kasei holding the largest single position and a wave of Korean and Chinese entrants entering since 2021. Concentration is high among a small group of filers, yet the overall corpus remains limited enough that well-directed R&D could establish meaningful prior art quickly.
Asahi Kasei leads a highly concentrated, early-stage field
Asahi Kasei holds the top position among ranked applicants, followed by LG Energy Solution and Yonsei University’s industry-foundation entity. The top five filers together account for sixty-nine percent of the hundred largest filers’ combined total, reflecting a sharply concentrated competitive structure.
A clear two-tier gap separates the leader from the rest: Asahi Kasei’s count is followed immediately by LG Energy Solution, with all remaining filers holding a single patent record each. This tier gap signals that first-mover advantage is already being established, but the window for challengers remains open given the field’s youth.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Asahi Kasei Corporation | 4 | |
| 2 | LG Energy Solution | 3 | |
| 3 | UI (University Industry Foundation) Yonsei University | 2 | |
| 4 | Jiangsu Yite New Material Co Ltd | 1 | |
| 5 | Wuhan Tianshi Kefeng New Energy Technology Co Ltd | 1 | |
| 6 | QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINES… | 1 | |
| 7 | Wuhan University of Technology | 1 | |
| 8 | Korea Petrochemical Ind Co Ltd | 1 | |
| 9 | Yonsei University Industry-Academic Cooperation Foundation | 1 | |
| 10 | ELECTRONICS & TELECOMM RES INST | 1 |
The leaders’ positions imply that binder chemistry for solid-state cells is being treated as a core IP asset rather than a commodity input. Asahi Kasei’s emphasis on rubber-treatment chemistry alongside battery-cell classification suggests a differentiated materials approach, while LG Energy Solution’s entry signals that large battery manufacturers are beginning to internalize binder IP.
Filings from the most recent eighteen to twenty-four months are likely under-represented due to standard patent publication lag; the true recent activity level is higher than the raw counts suggest. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity surged from 2021 onward; battery-cell classification dominates the technology mix
Two patterns define the structural picture: a clear inflection in annual filings beginning in 2021, and an overwhelming concentration of records under the battery and fuel-cell IPC class, with polymer-chemistry branches playing a secondary but meaningful role.
Annual filing trend
Filings were absent from 2017 through 2020, then jumped to four records in 2021 before a quieter 2022 and a renewed climb to five records in 2024. The 2025 and 2026 counts should be treated as provisional given publication lag; the underlying growth trajectory remains upward on a multi-year basis with a fifty-percent recent growth rate.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells and fuel cells) covers all twelve records, confirming that applicants anchor their binder claims to electrochemical device function. Adhesive chemistry (C09J) appears in four records and addition-polymer chemistry (C08F) in two, indicating that a subset of filers is pursuing upstream polymer-science coverage. Polymer-composition classification (C08L) appears in only one record, marking it as the most sparsely populated adjacent branch.
↗ 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.
All solid state battery binder using conjugated di…
This all solid state battery binder contains a conjugated diene-based polymer that includes a polymer block having a vinyl aromatic monomer unit as a main component, and that has a weight average molecular weight of 40,000-2,000,000. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | All solid state battery binder using conjugated di… | 17 |
| 2 | 一种用于固态电池的粘结剂的制备方法及应用 | 7 |
| 3 | All solid state battery binder using conjugated di… | 4 |
| 4 | 固态电池粘结剂及其制备方法 | 2 |
| 5 | Composition for all-solid-state battery binder, el… | 1 |
| 6 | Sulfide-based all-solid-state battery binder conta… | 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.
What the structure means for R&D investment decisions
The combination of a growth-stage lifecycle, high concentration, active academic-industry collaboration, and broad geographic spread creates a specific risk-reward profile for new entrants and incumbents alike.
Growth stage: filings rising from a near-zero base
The field is classified as Growth, with annual filing volume still rising and the most recent years understated by publication lag. The jump from zero filings before 2021 to consistent activity afterward marks a genuine inflection, not a statistical artifact. Entrants joining now are still in a formative window rather than a crowded mature market.
Growth stageTop five hold sixty-nine percent of the ranked hundred’s total
The top five filers account for sixty-nine percent of the hundred largest filers’ combined total, with a sharp drop-off after the third-ranked applicant. This concentration means that a new entrant filing even two or three well-scoped patent families could materially shift the competitive balance. The small absolute corpus also means that freedom-to-operate analysis is tractable today but will become more complex quickly as new entrants continue to file.
High concentrationLG Energy Solution and Yonsei University anchor the collaboration network
The most active co-filing pair is LG Energy Solution with the Yonsei University industry foundation, with two joint records, plus one additional co-filing between LG Energy Solution and the Yonsei University industry-academic cooperation foundation. Wuhan University of Technology and Wuhan Tianshi Kefeng New Energy Technology also co-filed one record together. The pattern shows that academic-industry partnerships, particularly in Korea, are a primary route to IP generation in this field.
Academic-industry pairsChina and South Korea share the lead jurisdiction; Europe and Japan are secondary
China and South Korea each account for three patent records, with Europe (EPO) and Japan at two each, and Taiwan and WIPO at one each. The dual Asia lead reflects where solid-state battery manufacturing investment is concentrated. Europe and Japan filings suggest that at least some applicants are pursuing broad international protection, making those jurisdictions worth monitoring for freedom-to-operate purposes.
Asia-led, global reachGo 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 |
|---|---|---|
| LG Energy Solution | UI (University Industry Foundation) Yonsei University | 2 |
| LG Energy Solution | Yonsei University Industry-Academic Cooperation Foundation | 1 |
| Wuhan University of Technology | Wuhan Tianshi Kefeng New Energy Technology Co Ltd | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Asahi Kasei leads on volume; LG Energy Solution enters with momentum
The two leading filers take distinct approaches: the incumbent materials company anchors binder IP in rubber-treatment and battery-cell chemistry, while the battery manufacturer enters directly via cell-level classification.
Asahi Kasei Corporation
Asahi Kasei holds four patent records, the highest count among ranked applicants. Their technology emphasis spans H01M 10 and H01M 4 (battery cell and electrode classifications) as well as C08C 19 (rubber treatment), indicating that their binder approach is grounded in proprietary polymer-processing chemistry. As a long-standing specialty materials company, their early positioning in this niche is consistent with a deliberate IP strategy to protect binder formulations before broader commercialization.
patent records: 4LG Energy Solution
LG Energy Solution holds three patent records and entered as a new entrant in the most recent period, making it the fastest-rising challenger by momentum. Their filings are concentrated in H01M 10 and H01M 4, mirroring the battery-system perspective of a cell manufacturer rather than a materials supplier. Their active co-filing with Yonsei University suggests that university partnerships are accelerating their binder IP development.
patent records: 3| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| LG Energy Solution | 3 | ▲ new entrant |
| UI (University Industry Foundation) Yonsei University | 2 | ▲ new entrant |
| Electronics and Telecommunications Research Institute (ETRI) | 1 | ▲ new entrant |
| Yonsei University Industry-Academic Cooperation Foundation | 1 | ▲ new entrant |
| Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences | 1 | ▲ new entrant |
| Korea Petrochemical Ind Co Ltd | 1 | ▲ new entrant |
Under-served polymer-composition branch warrants monitoring
The IPC branch analysis reveals one notably sparse adjacent area relative to the dominant battery-cell classification. This sparsity is an observation about current filing patterns rather than a confirmed commercial gap.
C08L · Polymer compositions
C08L covers the formulation and blending of polymer systems and appears in only one patent record in this corpus, giving it a five-percent share of the adjacent branches. For a binder technology where the polymer matrix composition is central to electrochemical performance, this low coverage is notable. An entrant with expertise in multi-component polymer blending for solid electrolyte interfaces could file claims at the material-composition level that are currently unoccupied, provided the technical differentiation from existing H01M-anchored claims can be demonstrated.
Search this in Eureka →C08F · Addition polymers (vinyl and related)
C08F addition-polymer chemistry appears in only two records, both held by Jiangsu Yite New Material Co Ltd, with no other filers active in this branch. Vinyl-type and fluoropolymer binders are relevant to solvent-free electrode processing for solid-state cells, a processing challenge that is distinct from the electrochemical binder function covered under H01M. The single-filer concentration here means the branch is both sparse and currently controlled by one Chinese materials company, making it worth watching for follow-on filings or licensing signals.
Search this in Eureka →How leading filers 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 | C08C 19 · Rubber treatment | C09J 153 · Adhesives | C08F 220 · Addition polymers (vinyl etc.) |
|---|---|---|---|---|---|
| Asahi Kasei Corporation | Strong · 4 | Strong · 4 | Moderate · 2 | Moderate · 1 | Absent |
| LG Energy Solution | Strong · 3 | Strong · 3 | Absent | Absent | Absent |
| UI (University Industry Foundation) Yonsei University | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
| Wuhan Tianshi Kefeng New Energy Technology Co Ltd | Strong · 1 | Strong · 1 | Absent | Strong · 1 | Absent |
| Wuhan University of Technology | Strong · 1 | Strong · 1 | Absent | Strong · 1 | Absent |
| Jiangsu Yite New Material Co Ltd | Strong · 1 | Strong · 1 | Absent | Absent | Strong · 1 |
| Korea Petrochemical Ind Co Ltd | Strong · 1 | Strong · 1 | Absent | Absent | Absent |
Frequently asked questions
The current evidence covers 12 patent families in scope. This is a small corpus, consistent with the field’s early-growth stage and the recency of serious commercial interest in solid-state cell manufacturing.
Asahi Kasei Corporation holds four patent records, the highest count among all ranked applicants. LG Energy Solution is second with three records, and the Yonsei University industry foundation is third with two records.
Filings were absent from 2017 through 2020. Activity began in 2021 with four records and has continued since, with 2024 seeing five records. The most recent years are likely understated due to publication lag.
China and South Korea each account for three patent records. Europe (EPO) and Japan each have two records. Taiwan and WIPO (PCT) each have one record. The dual Asia lead reflects where solid-state battery development is most active.
Yes. The most active co-filing relationship is between LG Energy Solution and the Yonsei University industry foundation, with two joint records. LG Energy Solution and the Yonsei University industry-academic cooperation foundation co-filed one additional record. Wuhan University of Technology and Wuhan Tianshi Kefeng New Energy Technology also co-filed one record together.
Polymer-composition chemistry (C08L) has only one patent record in this corpus and is the most sparsely filed adjacent branch. Addition-polymer chemistry (C08F) has two records, both held by a single Chinese materials company. Both branches are under-represented relative to the dominant battery-cell classification (H01M), which covers all twelve records.
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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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