Fastest
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/anode-free-and-silicon-dominant-cells-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Solid-State BatteriesAnode-Free and Silicon-Dominant Cell Patents
- 45.0% of all 855 records sit with just five assignees — filing here is already concentrated at the top, not evenly spread across a crowded field.
- Filing held roughly flat, -4%, from 89 records in 2021 to 85 in 2024, after peaking at 113 in 2022 — this is a plateau, not a retreat.
- H01M covers 94.7% of records but C01B (inorganic compounds), C23C (coating) and B82Y (nanotech) each sit under 15%, marking where claim space is still thin.
855
Published Records
45%
Top-5 Share of All Records
-4%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (89 records) with 2024 (85) — 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 855 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This landscape tracks patent filings at the intersection of anode-free cell architectures and silicon-dominant anode chemistries — designs that remove or minimise the graphite host and rely instead on lithium plating directly onto a current collector, or on silicon absorbing most of the cell's capacity. The search combines these architecture terms with the operating problems that define whether such a cell survives cycling: first cycle efficiency, volume expansion, current collector coating, binder selection, electrolyte consumption and stack pressure control.
855 records fall within scope, spanning 2015 through the 2026-07-31 cut-off. Because publication trails filing by roughly 18 months, the most recent filing years are still filling in and should be read as a floor, not a ceiling.
Filing activity by year
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The Numbers
Filing trends and technology composition
Two views of the same 855 records: how filing activity has moved year over year, and which IPC subclasses carry the claims.
A decade of filing, now plateauing
Annual filings rose from 71 in 2017 to a peak of 113 in 2022, then eased to 85 by 2024 — a -4% move from the 89 filed in 2021. That is a levelling-off after rapid early growth, not a decline; 2025 and 2026 figures are still incomplete due to publication lag.
Concentration in H01M, thin coverage elsewhere
H01M (batteries, cells and fuel cells) touches 94.7% of the 855 records, confirming this is squarely a battery-architecture field. Secondary classes are far thinner: C01B sits at 14.7%, H01G at 6.3%, and C04B, C23C, H01B, C09D and B82Y each fall under 3.5% — evidence that materials-science detail around coatings, ceramics and nanostructuring is comparatively under-claimed relative to the core cell architecture.
Shares are the percentage of the 855 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Anode Free and Silicon Dominant Cells with Eureka
This page is one run against one query. Ask Eureka your own question about anode free and silicon dominant cells and every answer comes back with the patent numbers behind it.
Try EurekaKey Patents
Most-cited prior art and a representative filing
Representative Filing
WO2023282999A1 — Prelithiation of free-standing silicon dominant anode batteries
ENEVATE CORPORATION
Systems and methods for batteries comprising a cathode, an electrolyte, and an anode, where prelithiation reagents are utilized to treat one or more of the anode and cathode. In one embodiment, the prelithiation reagent is a Li-organic complex solution comprising naphthalene and metallic lithium dissolved in an inhibitor-free THF.Filed by Enevate Corporation, published 2023-01-12.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080261116A1 | Method of depositing silicon on carbon materials and forming an anode for use in lithium ion batteries | 278 |
| 2 | US20100173198A1 | Secondary lithium ion battery containing a prelithiated anode | 221 |
| 3 | US20140272592A1 | Composite carbon materials comprising lithium alloying electrochemical modifiers | 197 |
| 4 | US20170170477A1 | Novel materials with extremely durable intercalation of lithium and manufacturing methods thereof | 190 |
| 5 | US20090246636A1 | High energy high power electrodes and batteries | 179 |
| 6 | US20170288211A1 | Elastomer-Encapsulated particles of high-capacity anode active materials for lithium batteries | 155 |
| 7 | US8241793B2 | Secondary lithium ion battery containing a prelithiated anode | 148 |
| 8 | US10147950B2 | Materials with extremely durable intercalation of lithium and manufacturing methods thereof | 115 |
| 9 | US20100120179A1 | Method of producing prelithiated anodes for secondary lithium ion batteries | 115 |
| 10 | US20200020935A1 | Decomposition of silicon-containing precursors on porous scaffold materials | 110 |
Citation counts favour older filings simply because they have had more time to accumulate citations within the searched corpus — treat this as a signal of influence on the field's early direction, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Run it yourself
Put your own technology through the same analysis
Where to run it
For builders
MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →Insights
What the data means for a filing decision
Three patterns worth acting on before drafting a new application in this space.
Concentration
45.0% of 855 records
held by five assignees
The top of the field is already crowded
Five assignees hold 385 of the 855 records in scope, and the top ten combined reach 60.7%. A new entrant filing broad architecture claims in anode-free or silicon-dominant cells is filing into ground the leaders already occupy — differentiation needs to sit in a specific mechanism, not the cell concept itself.
Based on the ranked assignee list of 100 companies.
Momentum
89 → 85 records
2021 to 2024, -4%
Filing has plateaued, not collapsed
After climbing from 71 filings in 2017 to a peak of 113 in 2022, annual output settled back to 85 by 2024 — essentially flat over the three-year span. That reads as a maturing field working through incremental improvements rather than one losing investor interest.
2025-2026 figures are still incomplete due to publication lag.
Composition
14.7% in C01B
vs 94.7% in H01M
Materials claims trail architecture claims
Almost every record touches core battery-cell classification H01M, but the classes that describe how silicon or lithium metal surfaces are actually treated — inorganic compounds, coatings, nanotechnology — each cover under 15% of records. That gap is where mechanism-level claims still have room.
Class shares sum to more than 100% because records carry multiple IPC codes.
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to anode free and silicon dominant cells, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
A small group of specialists and majors account for most output; a long tail files once or twice and stops.
Leader
109 records
single largest filer
One filer well ahead of the pack
The leading assignee holds 109 records, more than double the fifth-place filer's 50 — a gap wide enough to suggest a sustained, dedicated research program rather than opportunistic filing.
Counted in patent families across the full ranking.
Mid-field
50 vs 19 records
5th place vs 10th place
A steep drop after the top five
Filing volume falls sharply between fifth place (50 records) and tenth place (19), meaning the real competitive set for freedom-to-operate analysis is smaller than the full ranked list of 100 companies suggests.
Ranked leaders, not a top-50 or top-100 list by definition.
Collaboration
5 co-assignee pairs
identified in the data
Joint filing is rare and specific
Only five co-assignee pairings appear across the dataset, the strongest linking an established battery major with a university research partner. Co-filing here signals targeted materials collaborations rather than broad industry consortia.
Strongest pair recurs across four shared filings.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Group14 Technologies Inc | 0 | -100% |
| Nanotek Instruments Inc | 0 | — |
| GRAPHENIX DEVELOPMENT INC | 0 | -100% |
| LG Energy Solution Ltd | 0 | -100% |
| Livent USA Corp | 0 | — |
| StoreDot | 0 | — |
| Enevate Corporation | 0 | — |
| Global Graphene Group Inc | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The landscape points to where claim space is thin and where the leaders are still active. Turning that into a filing or freedom-to-operate decision takes a closer look at the specific claims.
Map claim scope against the leaders
Compare draft claims directly against the filings held by the top five assignees before committing to an architecture-level approach.
Explore in Eureka →Probe the under-claimed branches
Coating chemistries, binder systems and stack pressure hardware show low filing density relative to the core cell architecture — worth a targeted prior-art search before drafting.
Run a white space search →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about this landscape
An anode-free cell is one built without a pre-installed anode host material, where lithium plates directly onto a bare current collector during the first charge. This search captures filings that address the practical problems this creates, including uneven plating, first cycle efficiency losses and electrolyte consumption at the collector surface. It is distinct from silicon-dominant designs, which retain an anode host but replace most of the graphite with silicon, though many records in this dataset address both approaches together.
Filing is concentrated: five assignees hold 45.0% of the 855 records in scope, and the leading filer alone holds 109 records against 50 for the fifth-placed company. Beyond the top ten, which together hold 60.7% of records, filing volume drops off quickly across a long tail of single- or few-filing entrants. This pattern suggests a small group of specialists and battery majors are driving most of the technical development, while the wider field experiments at the margins.
Filing rose steadily from 71 records in 2017 to a peak of 113 in 2022, then eased slightly to 85 by 2024 — a -4% move from 2021's 89 records, essentially a plateau rather than a decline. Figures for 2025 and 2026 appear lower still, but that reflects publication lag of roughly 18 months rather than a genuine slowdown, since recent filings have not all published yet. Treat any apparent drop in the last one to two years with caution for this reason.
The core battery-architecture class, H01M, appears in 94.7% of the 855 records, but supporting materials classes are comparatively thin: inorganic compound chemistry (C01B) sits at 14.7%, coating and surface deposition (C23C) at 3.0%, and nanotechnology applications (B82Y) at just 1.5%. That gap points to under-claimed territory in current collector coatings, binder systems tuned for silicon expansion, and prelithiation reagent chemistry — areas where a specific mechanism claim is more likely to clear prior art than a broad architecture claim.
WO2023282999A1, filed by Enevate Corporation and published in January 2023, covers prelithiation methods for free-standing silicon-dominant anodes using a lithium-organic complex solution, specifically naphthalene and metallic lithium dissolved in inhibitor-free THF. It is a representative filing rather than a foundational one, so its practical effect depends on how tightly its claims are drafted around that specific reagent chemistry and process. Anyone using a different prelithiation solvent system or a non-free-standing anode format has a plausible path around it, though a full claim chart against the specific limitations is the only way to confirm freedom to operate.
Answers are grounded in the same dataset. Derived from a Patsnap search on Anode Free and Silicon Dominant Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Research Anode Free and Silicon Dominant Cells in depth with Eureka
Go past this page: query the whole anode free and silicon dominant cells corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.