Lithium-Metal Battery Patent Landscape 2026
Lithium-Metal Battery Patent Landscape in 2026
The lithium-metal battery field is in an active growth phase, with filing volume expanding significantly over the multi-year window and the top five filers holding a commanding share of activity among the hundred largest filers. LG Energy Solution leads by a wide margin, but Korean and Chinese battery specialists form a tightly contested second tier, and filings are concentrated in the United States as the primary prosecution jurisdiction.
LG Energy Solution leads a concentrated field of Korean and Chinese specialists
LG Energy Solution holds the top position in the ranking, ahead of Contemporary Amperex Technology (Hong Kong) Limited and Samsung SDI, which are tied for second. The top five filers together account for forty percent of the combined output of the hundred largest filers, signalling a moderately concentrated competitive structure.
A visible tier gap separates the top three from the rest: the leader’s count is nearly twice that of the sixth-ranked Samsung Electronics. Below the top six, the ranking transitions to a long tail of automotive OEMs, specialty startups, and academic institutions.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | LG Energy Solution Ltd | 954 | |
| 2 | Contemporary Amperex Technology (Hong Kong) Limited | 515 | |
| 3 | Samsung SDI Co Ltd | 515 | |
| 4 | Honeycomb Battery Co | 445 | |
| 5 | Contemporary Amperex Technology Co Ltd | 397 | |
| 6 | Samsung Electronics Co Ltd | 353 | |
| 7 | GM Global Technology Operations LLC | 212 | |
| 8 | PolyPlus Battery Co Inc | 172 | |
| 9 | KOREA ADVANCED INST OF SCI & TECH | 140 | |
| 10 | Ningde Amperex Technology Ltd | 134 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | University of Michigan | 89 | |
| 12 | SES AI Corporation | 86 | |
| 13 | Evonik Operations GmbH | 82 | |
| 14 | University of California | 82 | |
| 15 | SK On Co Ltd | 81 | |
| 16 | Hyundai Motor Co Ltd | 77 | |
| 17 | LG Chem Ltd | 74 | |
| 18 | Pure Lithium Corp | 68 | |
| 19 | Nanotek Instruments Inc | 67 | |
| 20 | Toyota Motor Corporation | 66 |
The dominance of Korean battery specialists at the top, complemented by Chinese CATL-affiliated entities in the second tier, indicates that both incumbent cell manufacturers and their corporate spin-offs are the primary IP generators. This structure raises freedom-to-operate risk for new entrants in core cell chemistry.
Filings from the most recent eighteen to twenty-four months are under-counted due to patent publication lag; the apparent plateau in 2024–2025 data should not be read as a slowdown. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Sustained multi-year growth driven overwhelmingly by core cell and electrode chemistry
Annual filing volume has grown substantially since 2017, and the technology mix is heavily weighted toward H01M (batteries, cells, and fuel cells), leaving adjacent branches with comparatively thin coverage.
Annual filing trend
Filings rose from 524 in 2017 to a recorded peak of 1,249 in 2024, a pattern consistent with a field still in the growth phase. The drop to 945 in 2025 and 86 in 2026 reflects publication lag rather than a genuine contraction; those years are materially under-counted. The forty-five percent growth recorded in the recent window confirms the multi-year upward trajectory.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M dominates the technology composition by a wide margin, reflecting the primary focus on cell-level innovation. Adjacent branches — including C01B (non-metallic elements and inorganic compounds), H01G (capacitors), H02J (power supply and grid systems), and B82Y (nanotechnology applications) — each account for roughly one to two percent of records, indicating that interface chemistry, system integration, and nanomaterial enablers remain comparatively sparse relative to core cell work.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Electrolyte for lithium metal battery, lithium met…
An electrolyte for a lithium metal battery, the electrolyte including: a solvated ionic liquid including a glyme solvent and a lithium salt, wherein an amount of the lithium salt is about 3 moles per liter or greater, and wherein a lithium metal battery including the electrolyte has an initial solution resistance of less than about 1 ohm and a bulk… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Separator for a high energy rechargeable lithium b… | 508 |
| 2 | Nano graphene reinforced nanocomposite particles f… | 502 |
| 3 | Conductive nanocomposite-based electrodes for lith… | 419 |
| 4 | Composite solid electrolyte for protection of acti… | 388 |
| 5 | Graphene foam-protected anode active materials for… | 360 |
| 6 | Solid polymer electrolytes | 348 |
| 7 | Secondary cell | 341 |
| 8 | Layered arrangements of lithium electrodes | 339 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural observations — maturity stage, concentration, collaboration patterns, and geographic focus — together define where the defensible white space lies and where competitive pressure is highest.
Growth stage: annual volume still expanding on a multi-year basis
The field is classified as Growth, with a forty-five percent increase recorded in the recent window. Annual volume reached its highest recorded level in 2024 at 1,249 patent families, and the lifecycle assessment indicates that filings are still rising on a multi-year basis. This stage implies that core technology positions are still being staked out and that entry costs — in terms of both R&D and prosecution — remain high but not yet prohibitive.
Growth phaseModerate concentration with a steep drop after the top six
The top five filers represent forty percent of the hundred largest filers’ combined output, and the leader holds roughly twice the count of the sixth-ranked applicant. Below the top six, the field fragments into a long tail of automotive OEMs, startups, and universities. For a new entrant, this structure means that competing head-on in core cell chemistry is difficult, but differentiated positions in adjacent branches remain achievable.
Moderate concentrationSamsung SDI–Samsung Electronics is the most active co-filing pair, with 167 joint families
The most prolific collaboration pair is Samsung SDI and Samsung Electronics, with 167 co-filed patent families, suggesting deep intra-group integration of device and cell IP. LG Energy Solution co-files actively with Korea Advanced Institute of Science and Technology (60 families) and Seoul National University R&D Foundation (13 families), reflecting a corporate-academic bridge strategy. CATL’s domestic affiliate Shenzhen Times Future Energy Technology is its primary co-filer (12 families), pointing to a more internalized Chinese IP ecosystem.
Intra-group + academicUnited States is the lead prosecution jurisdiction; China and EPO are strong secondary markets
The United States leads all jurisdictions by a substantial margin, followed by China and Europe (EPO). South Korea and Germany represent significant secondary filings, consistent with the nationality of leading applicants and the importance of European automotive supply chains. The presence of WIPO (PCT) filings indicates that major applicants are pursuing broad international protection strategies.
US-first, global reachGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Samsung SDI Co Ltd | Samsung Electronics Co Ltd | 167 |
| LG Energy Solution Ltd | Korea Advanced Institute of Science and Technology (KAIST) | 60 |
| LG Chem Ltd | Korea Advanced Institute of Science and Technology (KAIST) | 44 |
| Samsung SDI Co Ltd | 汉阳大学校产学协力团 | 19 |
| Samsung Electronics Co Ltd | Corning Inc | 17 |
| Samsung SDI Co Ltd | Seoul National University R&D Foundation | 15 |
| LG Energy Solution Ltd | Seoul National University R&D Foundation | 13 |
| Contemporary Amperex Technology Co Ltd (CATL) | Shenzhen Times Future Energy Technology Co Ltd | 12 |
| LG Energy Solution Ltd | 浦项工科大学校产学协力团 | 9 |
| Samsung Electronics Co Ltd | Massachusetts Institute of Technology (MIT) | 9 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Energy Solution leads; CATL-affiliated entities and Samsung SDI are accelerating challengers
The leader and top challenger differ in trajectory: LG Energy Solution has a slight recent decline while Samsung SDI shows a sharp multi-year acceleration, and both concentrate heavily on H01M core cell and electrode technology.
LG Energy Solution
LG Energy Solution holds the top position with 954 patent families, maintaining a broad portfolio across H01M 10 (cell systems), H01M 4 (electrodes), and H01M 50 (cell components). Its recent filing momentum shows a modest six percent decline versus the prior period, suggesting a possible portfolio consolidation or a shift toward continuation activity rather than new family creation. It is the most active corporate-academic co-filer, partnering with KAIST and Seoul National University.
families: 954Samsung SDI
Samsung SDI is tied for second place with 515 patent families and shows the most dramatic momentum among established players, with recent filings running at 4.9 times the prior three-year level. Its technology emphasis mirrors the leader’s — concentrated in H01M 10, H01M 4, and H01M 50 — but the acceleration signals a deliberate push to close the gap with LG Energy Solution. Its intra-group collaboration with Samsung Electronics (167 joint families) also gives it a unique device-integration IP angle.
families: 515| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Contemporary Amperex Technology Co Ltd (CATL) | 330 | ▲ +41% |
| LG Energy Solution Ltd | 252 | ▼ -6% |
| Samsung SDI Co Ltd | 172 | ▲ 4.9× vs prior 3-yr |
| LG Chem Ltd | 13 | ▼ -94% |
| Samsung Electronics Co Ltd | 28 | ▼ -69% |
| Contemporary Amperex Technology (Hong Kong) Limited | 137 | ▲ 5.1× vs prior 3-yr |
| GM Global Technology Operations LLC | 74 | ▬ +1% |
| PolyPlus Battery Co Inc | 17 | ▼ -23% |
Under-served branches adjacent to the dominant H01M core
Several IPC branches adjacent to core cell technology have low patent-record counts relative to H01M, representing areas where coverage is sparse. Whether these represent actionable opportunities depends on technical alignment and entry path.
B82Y · Nanotechnology applications
With only approximately one percent share of records, nanotechnology-enabled lithium-metal approaches — such as nanostructured lithium-metal anodes, nano-coating of current collectors, and nanoscale solid electrolyte interfaces — are sparsely covered relative to the overall field. Given that nano-engineering of the anode-electrolyte interface is widely recognized as a key path to suppressing dendrite growth, this branch has plausible technical value. A targeted entry via nano-coating processes (overlapping C23C) or nanomaterial synthesis (overlapping C01B) could define a defensible adjacent position.
Search this in Eureka →H02J · Power supply & grid systems
Power management, battery management systems, and grid-integration protocols for lithium-metal cells account for roughly two percent of records. As lithium-metal chemistries move toward automotive and stationary storage deployment, the need for chemistry-specific charging algorithms and cell-balancing IP will grow. The current sparsity relative to H01M suggests that system-level integration IP is underdeveloped, which could be an entry point for automotive OEMs or power-electronics firms with existing H02J portfolios.
Search this in Eureka →How leaders differ by technology route across H01M sub-classes
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | H01M 2 · Batteries, cells & fuel cells | H01M 6 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| LG Energy Solution Ltd | Strong · 562 | Strong · 440 | Moderate · 174 | Absent | Absent |
| Samsung SDI Co Ltd | Strong · 488 | Strong · 371 | Moderate · 120 | Emerging · 62 | Emerging · 14 |
| Contemporary Amperex Technology Co Ltd (CATL) | Strong · 579 | Moderate · 271 | Moderate · 133 | Absent | Absent |
| LG Chem Ltd | Strong · 385 | Strong · 294 | Moderate · 101 | Moderate · 82 | Absent |
| Samsung Electronics Co Ltd | Strong · 338 | Strong · 213 | Moderate · 96 | Emerging · 49 | Absent |
| Nanotek Instruments Inc | Strong · 285 | Strong · 299 | Absent | Emerging · 33 | Emerging · 10 |
| PolyPlus Battery Co Inc | Strong · 163 | Strong · 125 | Strong · 105 | Moderate · 74 | Moderate · 71 |
Frequently asked questions
The corpus covers 8,256 patent families in scope globally.
LG Energy Solution leads the ranking with 954 patent families, ahead of Contemporary Amperex Technology (Hong Kong) Limited and Samsung SDI, both at 515 patent families.
Yes. The field is classified as Growth, with a forty-five percent increase in the recent filing window. Annual recorded filings rose from 524 in 2017 to a peak of 1,249 in 2024. The apparent drop in 2025 and 2026 data reflects patent publication lag, not a genuine decline.
The United States leads all jurisdictions, followed by China and Europe (EPO). South Korea and Germany are significant secondary filing destinations.
The most-cited work addresses separator design for high-energy rechargeable lithium batteries (508 citations), nano graphene-reinforced nanocomposite particles for lithium battery anodes (502 citations), and conductive nanocomposite-based electrodes (419 citations), indicating that separator materials and nanostructured electrode composites are foundational reference points.
The sparsest adjacent branches relative to the dominant H01M core include B82Y (nanotechnology applications), H02J (power supply and grid systems), H01G (capacitors), and C01B (non-metallic elements and inorganic compounds), each accounting for roughly one to two percent of patent records. These represent areas where new entrants with relevant technical capabilities may find less crowded IP territory.
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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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