LMO Battery Electrolyte Patents: Leaders & White Space 2026
- Filing activity peaked in 2020 at 5 records and has since flattened rather than continued rising, suggesting the core additive chemistries claimed around 2018-2020 are still the reference art.
- 22 families total sit inside this IPC-and-keyword window, which is a small, tightly bounded corpus compared with general lithium-ion electrolyte filing.
- United States receives 14 of the filings far ahead of South Korea, Europe or PCT routes, showing where applicants have chosen to seek enforceable rights first.
What this landscape covers
This landscape isolates patent families at the intersection of lithium manganese oxide (LMO/LiMn2O4) cathode chemistry and electrolyte-side engineering — additives for manganese dissolution suppression, high-voltage electrolyte formulations, and related formulation claims. The search combines title/abstract terms for LMO with title/claims/description terms for electrolyte additives and formulations, restricted to the core lithium-battery IPC subclasses (H01M10/0567, H01M10/0525, H01M10/0569).
The scope deliberately excludes general electrolyte work that does not name LMO chemistry, and excludes LMO cathode claims that do not touch the electrolyte. That makes the 22-family result set small but precise: it is a view of how applicants have tried to solve LMO's characteristic manganese-dissolution and high-voltage-stability problems specifically through electrolyte formulation, not through cathode coating or doping routes.
Filing trend and technology composition
Two views of the same 22-family corpus: how filing volume has moved year over year, and which IPC subclasses the families sit in alongside the core battery classification.
A flat-to-declining trend after a 2020 peak
Filings rose from zero in 2017 to a peak of 5 in 2020, then eased back toward the 2022 midpoint of 2 per year. Because publication lags filing by roughly 18 months, the most recent years in this chart understate actual filing activity, but the shape through the confirmed years does not show renewed acceleration.
Concentrated in core battery classification, with a materials-chemistry secondary class
All 22 records classify under H01M (batteries, cells and fuel cells), as the search requires. A subset of 4 also carry a C01G classification for compounds of other metals, pointing to families that claim electrolyte formulation alongside a specific manganese or metal-oxide compound rather than treating the additive purely as a generic formulation ingredient.
Shares are the percentage of the 22 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Lithium Manganese Oxide Battery Electrolyte with Eureka
This page is one run against one query. Ask Eureka your own question about lithium manganese oxide battery electrolyte and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records in this corpus
Wide operating temperature range secondary lithium-ion batteries
A wide operating temperature range secondary lithium-ion battery designed is provided. The battery incorporates a cathode with lithium-based materials, including lithium manganese oxide, lithium cobalt oxide, lithium nickel manganese cobalt oxide, or lithium iron phosphate, and an anode with materials such as silicon, silicon oxide, carbon nanotubes, lithium metal, graphene, or graphite. A porous polymer separator, with porosity ranging from approximately 30% to 90%, ensures efficient ion transport. The non-aqueous electrolyte is composed of two or more lithium salts, including LiPF6, and a solvent mixture of carbonates and carboxylate esters with an asymmetric molecule structure.Filed by Hong Kong Applied Science and Technology Research Institute, published 2025-09-04 — one of the most recent entries in this dataset.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6942949B2 | Rechargeable lithium electrochemical cell | 58 |
| 2 | US5744262A | Stable high-voltage electrolyte for lithium secondary battery | 42 |
| 3 | US20040029017A1 | Rechargeable lithium electrochemical cell | 35 |
| 4 | US20050233207A1 | Electrolyte for lithium ion battery to control swelling | 27 |
| 5 | US20210313578A1 | Method and system for clay minerals as cathode, silicon anode, or separator additives in lithium-ion batteries | 8 |
| 6 | KR1020150062154A | Electrochemical device with improved safety | 5 |
| 7 | KR100708210B1 | Nonaqueous electrolyte for secondary battery | 5 |
| 8 | US20210336268A1 | Method and system for functional conductive polymer initiated cathode electrolyte interface for silicon anode… | 4 |
| 9 | WO2021113448A1 | Method and system for sulfur and sulfur-containing chemicals as cathode additives for silicon anode-based lit… | 2 |
| 10 | US11456457B2 | Method and system for aromatic macrocyclic compounds (phthalocyanines) as cathode additives for inhibition of… | 2 |
Citation counts inside a bounded corpus like this one favour older filings that have had more years to accumulate forward references; treat them as a measure of past influence rather than of which claims matter most today.
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 this niche
A small, bounded corpus still tells a clear story about where activity has concentrated and where the frontier of citation has settled.
Growth already flattened before 2022
The corpus peaked at 5 families in 2020 and eased to 2 by the 2022 midpoint. That is not a technology in early ramp; it reads as a niche that saw a burst of formulation activity and has since settled into steady, low-volume filing.
The US is the primary enforcement venue
Applicants have concentrated filings at the USPTO far more than at any other office, with South Korea, Europe and PCT routes each receiving a handful. A freedom-to-operate check for this chemistry should start with US grants before extending to other jurisdictions.
Foundational claims are two decades old
The most-cited record in this set is a 2000s-era rechargeable lithium electrochemical cell patent, and the next several most-cited records are similarly older filings. Newer families have not yet accumulated comparable citation counts, which is expected in a bounded, citation-favours-age corpus rather than evidence that no newer work matters.
Most families treat the additive as generic formulation
Only a minority of families pair the core H01M classification with a C01G compounds-of-metals class, meaning most electrolyte-additive claims in this space are written broadly rather than tied to a specific named compound family.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to lithium manganese oxide battery electrolyte, with the prior art for and against each one.
Who is active, and where the door is still open
Recent-year momentum across the tracked assignees shows no filer posting growth in the latest year; several show 0 activity or a full year-over-year drop, consistent with the flattened overall trend rather than a single company pulling back.
No assignee shows recent-year growth
Every organisation tracked in the recent-momentum view, including established battery and materials players, recorded zero filings in the latest year, and one shows a full -100% year-over-year decline. That is consistent with a corpus that peaked in 2020 and has not reaccelerated.
A long tail rather than a dominant leader
With only 22 families in total and momentum flat across every tracked filer, this space does not show one company controlling the claim space. That leaves room for a well-drafted formulation claim to stand apart rather than compete directly against a dominant incumbent's portfolio.
Public research institutes are active alongside industry
The tracked assignee list includes chemical companies, an industrial technology research institute, and a national science and industrial research council, indicating this niche draws both applied corporate R&D and publicly funded materials research rather than being purely proprietary.
| Assignee | Recent year | YoY |
|---|---|---|
| Xinqiangneng Battery Company | 0 | -100% |
| Council for Scientific and Industrial Research (CSIR), South Africa | 0 | — |
| LG Chem, Ltd. | 0 | — |
| Industrial Technology Research Institute (ITRI) | 0 | — |
| Nano and Advanced Materials Institute Limited (NAMI) | 0 | — |
| Hbrite Inc. | 0 | — |
| E-Square Technology Co., Ltd. | 0 | — |
Where to take this analysis
The dataset points to a few concrete next steps depending on whether the goal is freedom-to-operate, drafting, or monitoring.
Check US grants first
With 14 of the tracked filings routed through the USPTO, any freedom-to-operate review for LMO electrolyte formulations should start there before extending the search to South Korea, Europe or PCT filings.
Run a US-focused search in EurekaDraft around thin secondary classification
Only 4 of 22 families pair H01M with a C01G compound classification, suggesting formulation claims tied to a specific named additive compound face less crowded prior art than generic formulation language.
Explore claim gaps in EurekaTrack momentum for a reacceleration signal
Every tracked assignee shows zero filings in the latest year. A monitoring watch on this assignee list would catch the first sign of renewed investment before it shows up in a broader search.
Set up assignee monitoring in EurekaCommon questions about this landscape
This landscape tracks 22 patent families that combine LMO or LiMn2O4 cathode chemistry with electrolyte-side claims such as manganese dissolution suppression additives, high-voltage electrolyte formulations, or general electrolyte formulation language, filtered to the core lithium-battery IPC subclasses. The most-cited records in this set date back to the early-to-mid 2000s, including patents on rechargeable lithium electrochemical cells and stable high-voltage electrolyte formulations, which remain the reference points that later filings are measured against. Newer filings, including a 2025 publication on wide operating temperature range batteries, extend the same problem into solvent mixture and salt blend claims.
Based on the confirmed years in this dataset, filing peaked at 5 families in 2020 and eased to 2 by 2022, which is a flat-to-declining pattern rather than sustained growth. Publication lag of roughly 18 months means the most recent one to two years in any patent trend are understated, so the true 2024-2026 picture may be a little higher than shown. Even allowing for that lag, the shape through 2022 does not show the kind of acceleration seen in adjacent battery chemistries.
The United States is by far the dominant receiving office in this corpus, with 14 of the tracked filings, compared with 3 in South Korea, 2 at the EPO, 2 via PCT, and 1 in Denmark. That distribution means a US prior-art and granted-claims search should be the first step in any freedom-to-operate review for this chemistry, with South Korean and European filings as a secondary check. Applicants clearly prioritised US enforceability over broad multi-jurisdiction coverage in this niche.
The tracked assignee list includes a mix of battery manufacturers, materials companies, and public research institutes, but none of them show growth in the latest tracked year — every one recorded zero filings, and at least one shows a full year-over-year decline from a prior filing. With only 22 families total, no single assignee dominates the space; it reads as a long tail rather than a concentrated leader-and-followers structure. That makes it a reasonable space to enter with a differentiated formulation claim rather than one where a single incumbent's portfolio must be designed around first.
The classification data shows that only 4 of the 22 families pair the core battery IPC class with a compounds-of-metals classification, meaning most electrolyte additive claims are drafted in generic formulation language rather than tied to a specific named compound. That leaves room for claims narrowly tied to specific manganese-scavenger compounds, asymmetric carboxylate ester co-solvents, or wide-temperature-range solvent and salt blends, all of which appear only thinly in the current corpus. A first claim in one of these branches would sit on less-crowded prior art than a broad high-voltage-electrolyte formulation claim.
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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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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.