NMC Battery Cathode Material Patent Landscape 2026
- Filing peaked in 2018 at 14 families and has declined since, with the 2022 midpoint at only 6 — this is a maturing claim space, not a growing one.
- Coating chemistry, not bulk composition, carries the most-cited art: the top two cited records by a wide margin are lithium tetraborate glass coatings, filed by the same assignee family.
- Co-assignment is almost absent — just 2 pairs across 55 families, meaning most of this space was filed solo rather than through joint development.
Filing growth compares 2021 (8 records) with 2024 (6) — 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 55 records in scope (CR5), not by the ranked leaders only.
What's being claimed, and when
NMC cathode filings in this dataset cluster around three technical routes: high-nickel formulations such as NMC811, single-crystal cathode architectures that avoid intergranular cracking, and post-synthesis cathode coating treatments aimed at interface stability and safety. The IPC spread is narrow — nearly every record sits inside H01M, with a secondary cluster in C01G compounds — which tells you this is a chemistry-and-process space, not a device space.
Filing rose to a peak in 2018 and has fallen in the years since, with the 2022 midpoint at roughly half the peak. Because publication lags filing by about 18 months, the last one or two years in any chart will understate real activity — treat the tail as a floor, not a ceiling.
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Filing trend and technology composition
Two views of the same 55-family dataset: when the claims were filed, and which IPC subclasses they sit in.
Filing trend, 2017–2026
Activity climbed from 2 families in 2017 to a peak of 14 in 2018, then eased back to 6 at the 2022 midpoint and toward 0 in the latest, still-incomplete year — consistent with a technology whose core claim space was staked out early rather than one still being opened up.
IPC subclass distribution
All 55 records sit in H01M (batteries, cells and fuel cells); a secondary group of 10 also touches C01G (compounds of other metals), with single-digit counts in crystal growth, ceramics, metal extraction and surface coating — evidence that most invention is happening inside electrode chemistry rather than in adjacent materials science.
Shares are the percentage of the 55 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on NMC Battery Cathode Material with Eureka
This page is one run against one query. Ask Eureka your own question about nmc battery cathode material and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this corpus
Lithium ion batteries, solid-solution cathodes thereof, and methods associated therewith
Methods of determining ion exchange mechanism in a solid-solution cathode of a Li-ion battery include observing changes in nickel manganese cobalt oxide (NMC) particles of a composite electrode over time using operando optical microscopy, developing a multiphysics computational model of the observed changes, and determining the ion exchange mechanism from the model. A related method reduces first-charge heterogeneous reactions by increasing electrical conductivity and/or Li diffusivity in an NMC cathode.Filed by Purdue Research Foundation, published 2024-10-24 — a university-held filing focused on characterization method and conductivity/diffusivity improvement rather than a specific composition claim.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20170338471A1 | High capacity and stable cathode materials | 58 |
| 2 | US20190207209A1 | Electrodes with silicon oxide active materials for lithium ion cells achieving high capacity, high energy den… | 51 |
| 3 | US20200185709A1 | Lithium tetraborate glass coating on cathode materials for improving safety and cycling ability | 28 |
| 4 | US20200411901A1 | Lithium ion cells with high performance electroyte and silicon oxide active materials achieving very long cyc… | 20 |
| 5 | WO2019040533A1 | Lithium tetraborate glass coating on cathode materials for improving safety and cycling stability | 14 |
| 6 | US20200373560A1 | Stabilized High Nickel NMC Cathode Materials for Improved Battery Performance | 13 |
| 7 | WO2019126549A1 | Electrodes with silicon oxide active materials for lithium ion cells achieving high capacity, high energy den… | 10 |
| 8 | US11094925B2 | Electrodes with silicon oxide active materials for lithium ion cells achieving high capacity, high energy den… | 10 |
| 9 | CN110959207A | 实现高容量、高能量密度和长循环寿命性能的锂离子电池的具有硅氧化物活性材料的电极 | 9 |
| 10 | US20230059571A1 | Cathode material stabilization | 8 |
Citation counts are drawn from documents inside this search corpus and skew toward older filings — read them as a marker of influence on later filers, not of present-day commercial relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers say about where this field stands
Four signals from the dataset that matter more than the raw count of 55 families.
Activity is past its peak
Filing peaked in 2018 and declined through the 2022 midpoint; the latest year reads as zero, but that reflects publication lag, not a sudden stop. Treat the last 18 months as undercounted.
Coating and silicon-oxide chemistry lead influence
The two most-cited records address high-capacity cathode materials and silicon oxide active materials rather than bulk NMC stoichiometry — later filers are building on interface and additive chemistry, not on the base composition.
This is a solo-filer's field
Only two joint-assignee pairs appear in the whole corpus, the strongest being a national research organisation paired with a major automaker. Most applicants are prosecuting alone, which usually means freedom-to-operate analysis has to be done assignee-by-assignee rather than by tracing a partnership network.
US and EPO dominate the filing venue mix
United States receives the largest share of filings, with Europe and the PCT route well behind and China, Taiwan and Canada trailing further still — a filer expecting Asia-first competition should note the venue mix skews toward the US and Europe in this corpus.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to nmc battery cathode material, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Netherlands Organisation for Applied Scientific Research (TNO) | Toyota Motor Corporation | 4 |
| Ford Global Technologies, LLC | Worcester Polytechnic Institute | 2 |
Two pairs only: a national applied-research organisation with a major automaker (4 shared families), and a Tier-1 automotive supplier with a research university (2 shared families).
Who holds the claims, and who has gone quiet
Recent-year momentum matters as much as historical share here: several of the assignees with the deepest filing history show zero activity in the latest year.
Two long-standing filers have stopped
Battelle Memorial Institute and A123 Systems both show 0 filings in the latest year with a -100% year-on-year change, after being active contributors historically — a sign of programme wind-down or a shift to trade-secret protection rather than continued patenting.
Even the co-filing pair has gone quiet
Toyota Motor Corporation and the Netherlands Organisation for Applied Scientific Research (TNO) — the strongest co-assignee pair in the dataset — both register zero filings in the latest year, alongside the SUNY Research Foundation.
A long tail behind the historical leaders
The assignee ranking is built from all 55 families with no single entity dominating the count; expect a small group of historically active filers followed by a long tail of single- or few-filing entrants rather than one dominant incumbent.
| Assignee | Recent year | YoY |
|---|---|---|
| Zenlabs Energy, Inc. | 0 | — |
| Battelle Memorial Institute | 0 | -100% |
| A123 Systems, LLC | 0 | -100% |
| THE RES FOUNDATION FOR THE STATE UNIV OF NEW YORK | 0 | — |
| Netherlands Organisation for Applied Scientific Research (TNO) | 0 | — |
| Toyota Motor Corporation | 0 | — |
| Nanoone Materials Corp. | 0 | — |
| Rivian IP Holdings, LLC | 0 | — |
Where to take this analysis
The dataset points to a field with occupied core claims and a thinning filing rate — the open questions are about specific sub-claims, not about the overall composition space.
Map the coating-chemistry claim boundaries
The two most-cited records both concern glass and oxide coatings on cathode particles. Before filing a new coating composition, check how tightly those claims are drawn around specific glass formers and thicknesses.
Explore coating claims in Eureka →Track the assignees that have gone quiet
Several historically active filers show zero activity in the latest year. That can mean a programme paused, moved to trade secret, or simply not yet published — worth monitoring before assuming the space is open.
Set up assignee monitoring in Eureka →Test white space around characterization methods
Method-of-determination claims, like the operando optical microscopy approach in the representative filing, sit outside the densest composition clusters and may offer cleaner filing room.
Run a white-space search in Eureka →Common questions about NMC cathode patents
NMC811 refers to a nickel-manganese-cobalt cathode composition with an 8:1:1 ratio of nickel, manganese and cobalt, favouring nickel to raise energy density while reducing cobalt content. In this dataset it appears as a specific search term alongside broader high-nickel cathode language, which means claims can be drawn either narrowly around the 8:1:1 ratio or more broadly around high-nickel formulations generally. A filer working near this composition should check both the narrow numeric-ratio claims and the broader high-nickel language, since either could block a given formulation.
The filing trend in this corpus peaked in 2018 at 14 families and fell to 6 by the 2022 midpoint, with the most recent year showing almost nothing. Part of that drop is a real slowdown, and part is publication lag — patent applications typically publish around 18 months after filing, so the last one to two years understate actual activity. The pattern is more consistent with a field where the core composition space was staked out early, pushing later invention into narrower areas like coatings and processing rather than base chemistry.
The ranking in this dataset is built from 55 total patent families with no single entity taking an overwhelming share, which is typical of a field with a handful of historically active filers and a long tail of smaller contributors. Several long-standing filers, including Battelle Memorial Institute and A123 Systems, show zero activity and a -100% year-on-year change in the latest period, suggesting a shift in strategy or a paused programme rather than continued heavy investment. Anyone assessing freedom to operate should look at each assignee's filing history individually rather than assume one company controls the space.
Citation evidence points that way. The most-cited records in this corpus are lithium tetraborate glass coating patents and silicon oxide active material patents, both scoring well above other records in the dataset, which indicates later filers are building on interface and additive chemistry more than on raw stoichiometry. That does not mean bulk composition claims are undefended — H01M is the dominant IPC subclass across all 55 families — but it does suggest coating and interface treatments are where the influential prior art concentrates.
Based on the sub-areas least represented among the dense citation clusters and IPC subclasses in this dataset, characterization methods such as operando optical microscopy of ion exchange, multiphysics degradation modeling, and lithium-diffusivity enhancement techniques appear less crowded than composition and coating claims. Grain-boundary engineering for single-crystal cathodes is another area with limited representation relative to the core H01M cluster. These are directional signals from citation and IPC density, not a guarantee of allowability, and any filing decision should be paired with a full novelty search.
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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.