Battery Electrode Slurry Patents: Top Companies & Trends 2026
- Filing has cooled since its 2022 peak. 188 families published that year against 15 so far in the most recent (partial) year, with 2026 filings still understated by publication lag.
- Claims cluster almost entirely under H01M. 1,206 of 1,208 families sit in the batteries and cells subclass, with mixing equipment (B01F) and coating chemistry (C09D) drawing far fewer filers.
- Momentum has reversed at the largest East Asian filers. Recent-year filings at several major assignees are down 33%-100% year over year, even as the overall applicant base stays wide.
Filing growth compares 2021 (148 records) with 2024 (165) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 1,208 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Electrode slurry and dispersion patents sit at the intersection of formulation chemistry and process engineering: how active material, conductive additive, binder and solvent are combined, mixed in sequence, and coated without agglomerates or defects. This dataset tracks 1,208 patent families published between 2015 and mid-2026 that claim slurry composition, dispersion stability, viscosity control, solid content, mixing sequence or coating-defect mitigation, filtered to the relevant IPC classes for batteries, mixing equipment and coatings.
The filing curve peaked in 2022 and has declined since, though the most recent year is always undercounted because publication typically lags filing by around eighteen months. Receiving-office activity is led by Europe, China and the United States, with smaller but active filing through WIPO, India and South Korea, indicating this is a globally contested but not yet consolidated claim space.
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Filing trend and technology composition
Two views of the same 1,208-family dataset: how filing volume has moved year over year, and how those families distribute across the IPC subclasses that touch slurry and dispersion work.
Filings rose to a 2022 peak, then declined
Annual filings climbed from 41 in 2017 to a peak of 188 in 2022, then fell back toward 15 in the most recent partial year. Because publication lags filing by roughly 18 months, the last one to two years will fill in further as pending applications publish, but the shape of the decline from 2022 is already established.
H01M dominates; adjacent classes are thin
Almost every family in this set (1,206 of 1,208) falls under H01M, the batteries and cells subclass, confirming this is fundamentally a battery-electrode dataset rather than a general coatings or mixing one. Polymer chemistry (C08F, C08L) and inorganic materials (C01B) appear in meaningful but secondary numbers, while dedicated mixing equipment (B01F) and coatings (C09D) each account for well under 5% of families, a gap discussed further below.
Shares are the percentage of the 1,208 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Battery Electrode Slurry and Dispersion with Eureka
This page is one run against one query. Ask Eureka your own question about battery electrode slurry and dispersion and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
Positive electrode slurry including oxalic acid, preparation method thereof, positive electrode for secondary battery, and secondary battery
The application claims a positive electrode slurry for a lithium secondary battery that adds oxalic acid alongside an overcharge inhibitor to the active material, conductive material, binder and solvent, with the overcharge inhibitor specified within a narrow weight range relative to total solid content.Abstract condensed from the original filing; see the full-text record for complete claim language.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160126543A1 | Pre-Lithiation of Electrode Materials in a Semi-Solid Electrode | 229 |
| 2 | US20200014025A1 | Continuous and semi-continuous methods of semi-solid electrode and battery manufacturing | 98 |
| 3 | US10497935B2 | Pre-lithiation of electrode materials in a semi-solid electrode | 87 |
| 4 | US20200106094A1 | Pre-lithiation of electrode materials in a semi-solid electrode | 86 |
| 5 | US11139467B2 | Continuous and semi-continuous methods of semi-solid electrode and battery manufacturing | 59 |
| 6 | US20220231274A1 | Continuous and semi-continuous methods of semi-solid electrode and battery manufacturing | 52 |
| 7 | US20140287308A1 | Binder Resin for Nonaqueous Secondary Battery Electrode, Binder Resin Composition for Nonaqueous Secondary Ba… | 50 |
| 8 | US20110315918A1 | Positive Electrode Composition for Nonaqueous Electrolyte Secondary Battery, And Method For Producing Positiv… | 45 |
| 9 | US11652203B2 | Continuous and semi-continuous methods of semi-solid electrode and battery manufacturing | 43 |
| 10 | US20160028107A1 | Method of manufacturing positive electrode for solid-state battery, method of manufacturing solid-state batte… | 39 |
Citation counts favour older filings simply because they have had longer to accumulate citations within the searched corpus; treat them as a signal of influence on subsequent filers, not as a ranking of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for filing strategy
Three patterns stand out once the raw counts are read against publication lag and citation bias.
The wave has crested, not just slowed for the newest year
A 2022 peak followed by a multi-year decline is a different signal than a single soft final year caused by publication lag. Even allowing for undercounting in 2025-2026, the trajectory from 2022 onward points to fewer new entrants filing composition-level slurry claims, likely because the core formulation space is now well mapped.
Influence concentrates on a small cluster of semi-solid electrode filings
The most-cited records in this set are dominated by pre-lithiation and semi-solid electrode manufacturing filings rather than conventional slurry-coating claims, suggesting that semi-solid processing routes have drawn disproportionate downstream attention from later filers.
Dense claim coverage in batteries, thin coverage in equipment and coatings
With B01F (mixing) at 42 families and C09D (coatings) at 40, out of 1,208 total, the process-equipment and coating-defect side of this problem is far less crowded than the battery-composition side, even though defect and viscosity-control keywords sit in the search itself.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to battery electrode slurry and dispersion, with the prior art for and against each one.
Who is filing, and where the pace is changing
The applicant base spans large East Asian battery makers, materials suppliers and a long tail of single- or few-filing entities. Recent-year momentum diverges sharply from historical filing weight.
The largest historical filers are pulling back
Several of the assignees with the deepest filing histories in this set show sharp year-over-year declines in the latest year, including drops of 33%, 85% and 100% at individual companies. That does not necessarily mean less R&D activity; it may reflect a shift toward trade-secret protection for process know-how, or simply that composition-level claim space is already crowded.
Co-filing is limited and mostly intra-group
Co-assignee pairs are few and, where present, tend to link a company with named individual inventors or with a closely affiliated subsidiary rather than reflecting arm's-length joint ventures between competitors.
Europe, China and the US carry most of the filing volume
Europe leads receiving-office counts, followed closely by China and the United States, with WIPO, India and South Korea trailing. That spread indicates applicants are pursuing multi-region protection rather than concentrating on a single home market.
| Assignee | Recent year | YoY |
|---|---|---|
| Contemporary Amperex Technology Co., Ltd. (CATL) | 2 | -33% |
| Samsung SDI Co., Ltd. | 2 | -85% |
| LG Energy Solution, Ltd. | 0 | -100% |
| LG Chem, Ltd. | 0 | — |
| Panasonic Intellectual Property Management Co., Ltd. | 0 | -100% |
| Zeon Corporation | 0 | — |
| 24M Technologies, Inc. | 0 | -100% |
| Hysprint Global Limited | 0 | — |
Where to take this analysis
This landscape frames where slurry and dispersion filing activity sits today. Turning it into a filing or freedom-to-operate decision means going deeper on specific claims and specific competitors.
Check freedom-to-operate against the citation leaders
The semi-solid electrode filings that draw the heaviest citation counts in this set are a natural starting point for a claim-by-claim FTO review before committing to a similar processing route.
Run a claim comparison in EurekaTrack the assignees losing momentum
Several major filers show sharp year-over-year declines; confirming whether that reflects a shift to trade secrecy or a genuine pullback matters for competitive positioning.
Monitor assignee activity in EurekaScope the under-claimed mixing and coating branches
B01F and C09D families are a fraction of the H01M total despite sitting inside the same search scope, which is where an unencumbered first claim is more likely.
Explore white space in EurekaFrequently asked questions
Filing activity in this dataset is spread across large East Asian battery manufacturers and materials suppliers rather than concentrated in a single dominant holder. Several of the largest historical filers, including major Korean and Japanese battery makers, show declining filing counts in the most recent year, which suggests the leaderboard by cumulative family count and the leaderboard by current filing momentum tell different stories. Anyone assessing freedom to operate should look at both the ranking table and the recent-year momentum figures rather than relying on total counts alone.
Filings peaked at 188 families in 2022 and have fallen in every year since, reaching 15 in the latest partial year. Part of that decline is a data artefact: publication typically lags filing by around 18 months, so the most recent one to two years will always look artificially low until pending applications publish. But the decline is visible well before the most recent years, which points to a genuine slowdown in new composition-level filing after the core formulation space had already been well mapped by earlier applicants.
Composition patents claim the formulation itself, such as the ratio of active material, conductive additive, binder, solvent and additives like oxalic acid or overcharge inhibitors, and they dominate this dataset under the H01M battery subclass. Equipment patents claim the physical process, such as mixing sequence, shear rate, or dispersion equipment design, and fall mainly under B01F, which holds only 42 of the 1,208 families here. That imbalance means the equipment and process side of slurry manufacturing is comparatively open compared to the formulation side.
Yes, based on the IPC composition of this dataset. Mixing-sequence and shear-control equipment, conductive-additive dispersion stabilisers, and inline coating-defect detection all sit within the search scope but carry a small fraction of the filings that battery-composition claims do. That does not guarantee an application would grant, but it does indicate these are less crowded areas to search before drafting a first claim, particularly for applicants with a process-engineering rather than a materials-chemistry angle.
Citation counts in a fixed, date-bounded corpus systematically favour older filings simply because they have had more years to accumulate citations from later applicants. The most-cited records in this dataset are pre-lithiation and semi-solid electrode manufacturing patents from the mid-2010s, which reflects their long exposure window as much as their current commercial relevance. Citation rank is a reasonable proxy for historical influence on the field, but it should not be read as a live ranking of which technology route is winning today.
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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.
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.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.