Prelithiation Compensation Patents: Top Companies & Trends 2026
- 59.1% of the field sits with five filers. The top five assignees account for 110 of the 186 records in scope, a concentration that leaves little room to file broad composition claims without crossing existing art.
- Filing kept climbing through 2024. Volume grew from 9 records in 2021 to 11 in 2024, a 22% rise over that span, even as the 2022 peak of 28 records has not been matched since.
- Powder metallurgy is the second-heaviest class. B22F appears on 19.4% of records behind H01M's 97.8%, meaning the stabilised lithium metal powder route is claimed almost as often as the electrochemical cell art itself.
Filing growth compares 2021 (9 records) with 2024 (11) — 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 186 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Prelithiation compensates for the irreversible lithium loss that silicon anodes suffer on their first charge cycle, and patent activity in this space concentrates on three practical levers: stabilized lithium metal powder coatings, solution-processed prelithiation chemistries, and the dry-room and safety handling that any lithium-metal additive forces into a cell line. The search set spans 2015 through the 2026 cut-off and pulls records that combine prelithiation or lithium-loss-compensation language with claims tied to first-cycle efficiency, safety, uniformity or dry-room requirements.
Filings are not evenly spread. A small group of assignees holds a majority of the 186 records, IPC coverage is dominated by battery-cell classifications with a distinct secondary cluster in powder metallurgy, and citation weight sits on a handful of older foundational filings. The sections below unpack each of those patterns.
Filing trends and technology composition
Two views of the same 186-record set: how filing volume has moved year over year, and which IPC subclasses carry the claim language.
Filing trend, 2017–2026
Annual filings rose from 6 records in 2017 to a peak of 28 in 2022. Growth from 2021 (9) to 2024 (11) came to 22% over three years; 2025 and 2026 figures are still filling in as publication lags filing by roughly 18 months, so the most recent years should not be read as a slowdown.
IPC subclass coverage
H01M (batteries, cells and fuel cells) touches 97.8% of the 186 records, as expected for this topic. The next-largest class, B22F (powder metallurgy), covers 19.4% — a strong signal that stabilized lithium metal powder processing is a distinct, heavily claimed sub-route rather than a footnote. Smaller classes in coatings, alkali-metal compounds and alloys each sit under 5% and mark narrower, less-contested claim territory.
Shares are the percentage of the 186 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Prelithiation Compensation for Silicon Anodes with Eureka
This page is one run against one query. Ask Eureka your own question about prelithiation compensation for silicon anodes and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art
US20190013513A1 — Anode structure with binders for silicon and stabilized lithium metal powder
A simple solution processing method is developed to achieve uniform and scalable stabilized lithium metal powder coating on a Li-ion negative electrode. A solvent and binder system is developed around a 1% polymer-binder concentration in xylene, using a mixture of poly(styrene-co-butadiene) rubber and polystyrene, producing a long-sustained, uniformly dispersed stabilized lithium metal powder suspension and coating.Filed by Elevated Materials US LLC, published 2019-01-10.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5595837A | Process for prelithiation of carbon based anodes for lithium batteries | 150 |
| 2 | US20150364795A1 | Prelithiation solutions for lithium-ion batteries | 95 |
| 3 | US20060057463A1 | Composite materials of nano-dispersed silicon and tin and methods of making the same | 94 |
| 4 | US20190181440A1 | Prelithiated and methods for prelithiating an energy storage device | 79 |
| 5 | US20090035663A1 | Stabilized lithium metal powder for li-ion application, composition and process | 56 |
| 6 | US20090061321A1 | Stabilized lithium metal powder for li-ion application, composition and process | 55 |
| 7 | WO2008045557A1 | Stabilized lithium metal powder for li-ion application, composition and process | 54 |
| 8 | WO2009029270A1 | Stabilized lithium metal powder for lithium-ion applications, composition and production process | 42 |
| 9 | US20150017543A1 | Method for prelithiation, method for fabricating lithium secondary battery comprising the method, and lithium… | 34 |
| 10 | WO2016073438A1 | Pre-lithiation of electrode materials in a semi-solid electrode | 31 |
Citation counts are drawn from within this searched corpus and skew toward older filings; treat them as a measure of influence on later drafting, not as a ranking of current commercial relevance.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns worth acting on before drafting new claims in this space.
The core claim space is crowded at the top
Five assignees hold 110 of the 186 records in scope. A new entrant filing broad composition or coating claims for stabilized lithium metal powder is filing directly against this cluster, not around it.
A long tail of single- and few-filing entrants
Beyond the leading ten firms, which together hold 79.6% of records, the remaining assignees each hold small slices — evidence of experimentation outside the dominant coating and solution-processing routes rather than a settled field.
Powder metallurgy is a real second track
Nearly one in five records touches B22F powder-metallurgy classification alongside H01M, confirming that particle production and handling of stabilized lithium metal powder is claimed as heavily as cell-level chemistry.
Foundational art still anchors drafting
The most-cited record, on prelithiation of carbon-based anodes, predates the silicon-anode surge and still carries the heaviest citation weight in the set — a reminder that citation counts favour age over current relevance.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to prelithiation compensation for silicon anodes, with the prior art for and against each one.
Who is filing, and where the gate sits
The ranking below reflects all 56 assignees the data endpoint returns for this search, not a curated top-50 or top-100 — every one of them holds at least one record in scope.
One firm sets the pace
The leading assignee holds 26 of the 186 records, well ahead of fifth place at 18 and tenth place at 5 — a steep drop-off that marks where the field moves from concentrated to fragmented.
A small cluster of joint filers
Ten co-assignee pairs appear in the data, with the strongest pairing appearing on 9 shared records — evidence of a tight inventor-assignee cluster working the stabilized lithium metal powder route together.
US and EPO dominate the venue mix
The United States receives the largest share of filings at 61, followed by the EPO at 48 and the WIPO/PCT route at 30 — filers are protecting this technology primarily in the two largest lithium-ion markets before broader PCT coverage.
| Assignee | Recent year | YoY |
|---|---|---|
| FMC Corp | 0 | — |
| Enevate Corp | 0 | — |
| Contemporary Amperex Technology Co., Ltd. (CATL) | 0 | — |
| Livent USA Corp | 0 | — |
| YAKOVLEVA MARINA | 0 | — |
| GAO YUAN | 0 | — |
| LG Energy Solution Ltd | 0 | — |
| LG Chem Ltd | 0 | — |
Where to take this next
The dataset points to specific follow-up work rather than a single conclusion.
Map the leader's full claim scope
With 26 records, the leading assignee's portfolio needs a claim-by-claim read before any new filing in the stabilized lithium metal powder space, not just a count of its size.
Explore assignee portfolios in EurekaTrack the 2022 peak against later filings
Volume peaked at 28 records in 2022 and growth since (9 in 2021 to 11 in 2024, +22%) suggests continued but slower activity — worth revisiting once 2025-2026 publications catch up.
Set up filing-trend alerts in EurekaTest the under-claimed branches for freedom to operate
Coating deposition, alloy-based reservoirs and alkali-metal compound routes each sit under 5% of records — a search-and-clear here is far cheaper than one against the H01M/B22F core.
Run a white-space search in EurekaCommon questions on this landscape
Both, and the split matters for drafting. A large share of records in this set carry B22F powder-metallurgy classification alongside H01M battery-cell classification, meaning claims frequently cover how the stabilized lithium metal powder itself is made and handled, not just how it is used in a finished electrode. A freedom-to-operate search that only checks cell-level H01M art will miss powder-production and coating claims that sit in the B22F cluster.
Highly concentrated at the top and thin below it. The five leading assignees hold 110 of the 186 records in scope, 59.1% of the field, and the ten leading assignees hold 79.6%. Beyond that point the ranking runs through 56 assignees total, most holding only a handful of records, so the practical risk of an FTO clash is almost entirely with the leading group rather than the long tail.
Filings grew from 9 records in 2021 to 11 in 2024, a 22% increase over that three-year span, after peaking at 28 records in 2022. Because publication typically lags filing by around 18 months, the drop-off visible in 2025 and 2026 in the raw counts reflects incomplete data rather than an actual slowdown, so those two years should not be read as a trend signal yet.
Start with the highest-citation records in this set, since they anchor the language later filings build on: a 1990s-era process patent on prelithiation of carbon-based anodes carries 150 citations, and a stabilized-lithium-metal-powder composition and process filing carries 56. Read those alongside a recent representative filing on binder systems for stabilized lithium metal powder coatings, since binder chemistry claims are where much of the current drafting activity sits.
The thinnest coverage relative to the core H01M/B22F cluster sits in alkali-metal compound stabilizer chemistry, metal-rolling-based powder consolidation, and coating-layer surface deposition for powder passivation — each under 5% of the 186 records in scope. These are narrower claim territories than the dominant powder-metallurgy and cell-chemistry routes, and a first claim there would need to specify a distinct compound class or process step rather than relying on the broad language already established by the leading assignees.
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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.