Anode-Free Battery Patent Landscape 2026
Anode-Free Battery Patent Landscape in 2026
The anode-free battery space is in a growth phase, with 533 patent families on record and a multi-year filing surge led by LG Energy Solution and Contemporary Amperex Technology. The field is moderately concentrated among a handful of energy and automotive incumbents, with the United States firmly established as the primary filing jurisdiction.
LG Energy Solution leads a moderately concentrated field with a widening second tier
LG Energy Solution holds the top position with 58 patent families, nearly 53% more than the second-ranked Contemporary Amperex Technology (Hong Kong) with 38 patent families. Honda Motor (21), Ola Electric Mobility (20), and Battelle Memorial Institute (17) round out the top five, confirming that anode-free battery IP is being developed by a diverse coalition spanning battery makers, automotive OEMs, and research institutions.
The top five filers account for 27% of the combined output of the hundred largest filers. That share indicates a moderately concentrated landscape: a clear leader exists, but no single player commands dominant blocking coverage, leaving meaningful room for challengers and new entrants.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | LG Energy Solution, Ltd. | 58 | |
| 2 | Contemporary Amperex Technology (Hong Kong) Limited | 38 | |
| 3 | Honda Motor Co., Ltd. | 21 | |
| 4 | Ola Electric Mobility Ltd. | 20 | |
| 5 | Battelle Memorial Institute | 17 | |
| 6 | Semiconductor Energy Laboratory Co., Ltd. | 16 | |
| 7 | Hyundai Motor Company | 15 | |
| 8 | Belenos Clean Power Holding AG | 14 | |
| 9 | NAT TAIWAN UNIV OF SCI & TECH | 14 | |
| 10 | Faradion Limited | 13 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Wattrii Inc. | 13 | |
| 12 | TeraWatt Technology Inc. | 12 | |
| 13 | Board of Trustees of the Leland Stanford Junior University | 12 | |
| 14 | Pacific Industrial Development Corporation | 11 | |
| 15 | LG Chem, Ltd. | 11 | |
| 16 | Our Next Energy Inc. | 11 | |
| 17 | Soelect Inc. | 10 | |
| 18 | Contemporary Amperex Technology Co., Ltd. (CATL) | 10 | |
| 19 | Samsung SDI Co., Ltd. | 10 | |
| 20 | Toyota Motor Corporation | 9 |
LG Energy Solution’s scale, reinforced by the adjacent LG Chem presence (11 patent families), suggests a coordinated group-level IP strategy. Contemporary Amperex Technology’s rapid build-up from a standing start signals that the largest Chinese cell maker is actively contesting this space despite the corpus being US-weighted.
Filing counts for 2024–2026 are understated due to typical 12–18-month publication lag; the apparent easing from the 2022 peak should not be interpreted as a slowdown before lag-adjusted data are available. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth remains robust even as annual volume has eased from its 2022 peak
Two charts capture the field’s trajectory and technical scope: annual filing volume from 2017 onward reveals the growth arc, while the IPC class breakdown shows how tightly focused the innovation is on core electrochemical IP.
Annual filing trend
Filings rose sharply from 12 patent families in 2017 to a peak of 118 in 2022, then recorded 107 in 2023 and 93 in 2024. The three-year recent window sits 261% above the prior three-year window, confirming expansion on a multi-year basis. Counts for 2024–2026 are suppressed by publication lag and should be treated as lower bounds.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells, and fuel cells) dominates the IPC mix by a wide margin, reflecting the cell-chemistry focus of most filers. Secondary classes—C23C (coating and surface deposition), C01B (non-metallic elements and inorganic compounds), and H02J (power supply and grid systems)—each appear at single-digit share, indicating that surface engineering, materials synthesis, and system-level integration are under-explored relative to core cell design.
↗ 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.
Methods and systems for diagnosis of failure mecha…
Methods for diagnosing failure mechanisms and for predicting lifetime of metal batteries include monitoring rest voltage and Coulombic Efficiency over relatively few cycles to provide profiles that indicate, by the trends thereof, a particular failure mechanism (e.g., electrolyte depletion, loss of metal inventory, increased cell impedance). The methods… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | High coulombic efficiency cycling of metal batteries | 106 |
| 2 | Rechargeable battery having permeable anode curren… | 96 |
| 3 | Anode-free rechargeable battery | 82 |
| 4 | Materials and methods for components of lithium ba… | 75 |
| 5 | Electrolyte for stable cycling of rechargeable alk… | 68 |
| 6 | Rechargeable battery having permeable anode curren… | 68 |
| 7 | High energy density, high power density, high capa… | 34 |
| 8 | Electrolyte for high efficiency cycling of sodium … | 33 |
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 IP structure means for R&D investment decisions
Four structural signals—maturity, concentration, collaboration, and geography—collectively define where competitive risk is highest and where entry is still viable.
Growth stage: multi-year expansion with annual volume easing from the 2022 peak
The field carries a Growth lifecycle designation. The recent three-year filing window is 261% above the prior three-year window, confirming that the field is still expanding on a multi-year basis. Annual volume has eased from the 2022 peak of 118 patent families, but this moderation is at least partly attributable to publication lag in the most recent years. The technology is past early-stage but has not reached saturation, meaning foundational positions are still being established.
Growth stageModerate concentration with a pronounced leader-challenger gap
The top five filers hold 27% of the combined output of the hundred largest filers, a moderate concentration level that leaves the second tier competitively relevant. LG Energy Solution’s 58 patent families represent a substantial lead over the nearest rival, but the spread across battery makers, automotive OEMs, independent startups, and research institutions means that no single player controls gatekeeping IP across the entire value chain. New entrants with differentiated chemistry or manufacturing approaches can still secure meaningful positions.
Moderate concentrationHyundai Motor–Kia axis dominates co-filing; LG Energy Solution taps UC system expertise
The most active co-filing pair is Hyundai Motor Company and Kia (12 joint patent families), reflecting a tightly coordinated EV powertrain IP strategy within the Hyundai Motor Group. Hyundai also co-filed with Hanyang University (2 families), Korea University, KAIST, POSTECH, and Seoul National University R&DB Foundation (1 each), indicating a deliberate academic engagement program. LG Energy Solution co-filed with the Regents of the University of California (1 family), pointing to early-stage materials research partnerships with leading US universities.
OEM–university partnershipsUS-centric filing with meaningful EPO and PCT coverage; Asia underweighted relative to production share
The United States is the leading jurisdiction with 224 patent records, followed by Europe via the EPO (127) and WIPO PCT (83). India registers 39 records, a notable figure likely driven by Ola Electric Mobility’s domestic filing strategy. China holds only 19 records—strikingly low given that Chinese cell makers are among the top global filers—suggesting that anode-free battery protection strategies are currently skewed toward Western markets. South Korea (6) and Japan (5) are also underweighted relative to those countries’ overall battery manufacturing importance.
US-led, Asia underweightedGo 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 |
|---|---|---|
| Hyundai Motor Company | Kia Corporation | 12 |
| Hyundai Motor Company | Kia Corporation | 3 |
| Hyundai Motor Company | Hanyang University | 2 |
| LG Energy Solution, Ltd. | Regents of the University of California | 1 |
| Hyundai Motor Company | Korea University Industry-Academic Cooperation Foundation | 1 |
| Hyundai Motor Company | Korea Advanced Institute of Science and Technology (KAIST) | 1 |
| Hyundai Motor Company | POSTECH Industry-Academic Cooperation Foundation | 1 |
| Hyundai Motor Company | Seoul National University R&DB Foundation | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Energy Solution and CATL (Hong Kong) set the pace; automotive entrants closing fast
The leader and primary challenger both entered the corpus as new entrants in the recent measurement window, underlining how quickly this sub-field has industrialized from a research curiosity to a core R&D priority for major cell manufacturers.
LG Energy Solution
LG Energy Solution holds 58 patent families, the largest corpus in this landscape. Its technology focus is split between electrode design (H01M 4) and battery-system architecture (H01M 10), with a smaller structural/packaging layer (H01M 50), reflecting end-to-end cell development capability. The applicant momentum data classifies it as a new entrant in the recent filing window with 20 recent patent families, confirming that its position was built rapidly rather than accumulated over many years. The group-level coordination with LG Chem (11 patent families) further reinforces the breadth of its IP perimeter.
patent families: 58Contemporary Amperex Technology (Hong Kong)
Contemporary Amperex Technology (Hong Kong) Limited ranks second with 38 patent families, supplemented by Contemporary Amperex Technology Co. Ltd. (the mainland entity) with an additional 10 patent families. The Hong Kong entity’s momentum is classified as a new entrant with 22 recent patent families—the highest recent count of any tracked applicant—signaling an accelerating, front-loaded IP build rather than a legacy position. Its technology emphasis mirrors LG Energy Solution’s, with H01M 10 (battery systems) as the primary focus and H01M 4 (electrodes) and H01M 50 (structural components) as secondary layers, plus a nascent B60L 50 (electric vehicle propulsion) footprint indicating downstream application intent.
patent families: 38| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Contemporary Amperex Technology (Hong Kong) Limited | 22 | ▲ new entrant |
| LG Energy Solution, Ltd. | 20 | ▲ new entrant |
| Honda Motor Co., Ltd. | 8 | ▲ new entrant |
| Ola Electric Mobility Ltd. | 13 | ▲ new entrant |
| Battelle Memorial Institute | 4 | ▲ new entrant |
| Semiconductor Energy Laboratory Co., Ltd. | 16 | ▲ new entrant |
| Hyundai Motor Company | 15 | ▲ new entrant |
| Belenos Clean Power Holding AG | 12 | ▲ new entrant |
Surface deposition, inorganic materials, and grid integration are under-served adjacent branches
The corpus is overwhelmingly concentrated in H01M core cell chemistry. Several adjacent IPC branches carry low patent counts relative to their potential technical relevance to anode-free performance and commercialization—these are observations of relative sparsity, not validated market opportunities.
C23C · Coating & surface deposition
With 17 patent records and a 3% share of the IPC mix, surface and thin-film deposition methods are a sparse branch in this corpus. Anode-free cells depend critically on the current-collector surface to nucleate and strip lithium uniformly; coating architecture directly determines cycle life and safety. The sparsity may reflect that deposition IP is filed under battery-chemistry framing within H01M rather than C23C, or it may indicate a genuine gap in materials-engineering approaches to the nucleation problem. Teams with thin-film or ALD deposition expertise could explore whether cross-disciplinary filings in C23C add defensible coverage. Entry path: combine surface-engineering know-how with electrochemical characterization data to justify C23C claims alongside H01M co-claims.
Search this in Eureka →H02J · Power supply & grid systems
Only 9 patent records fall under H02J, representing 1% of the IPC mix, despite anode-free batteries being a candidate technology for grid-scale and vehicle-to-grid applications where charge-management protocols are critical to longevity. The near-absence of H02J filings suggests that charging-system architecture—fast-charge algorithms, formation protocols, and BMS designs tailored specifically for anode-free chemistry—is an under-claimed adjacent area. This is an observation of sparsity; whether it represents a viable entry path depends on whether core H01M holders have embedded equivalent claims in their existing families. Entry path: analyze the claim scope of leading H01M families to determine whether formation-protocol and charging-system claims are already captured before investing.
Search this in Eureka →How leading filers differ by IPC technology route
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 6 · Batteries, cells & fuel cells | H01M 2 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| LG Chem, Ltd. | Strong · 40 | Strong · 41 | Absent | Absent | Absent |
| Contemporary Amperex Technology (Hong Kong) Limited | Strong · 28 | Strong · 17 | Moderate · 8 | Absent | Absent |
| LG Energy Solution, Ltd. | Strong · 26 | Strong · 21 | Absent | Absent | Absent |
| Ola Electric Mobility Ltd. | Strong · 18 | Strong · 17 | Absent | Absent | Emerging · 2 |
| Battelle Memorial Institute | Strong · 17 | Strong · 13 | Absent | Absent | Emerging · 1 |
| Belenos Clean Power Holding AG | Strong · 14 | Strong · 13 | Moderate · 4 | Absent | Absent |
| Honda Motor Co., Ltd. | Strong · 19 | Absent | Moderate · 6 | Absent | Absent |
Frequently asked questions
The corpus covers 533 patent families globally. The United States is the leading filing jurisdiction with 224 patent records, followed by Europe via the EPO with 127 and WIPO PCT with 83.
LG Energy Solution holds the largest position with 58 patent families, ahead of Contemporary Amperex Technology (Hong Kong) with 38 patent families and Honda Motor with 21 patent families.
Yes, on a multi-year basis. The recent three-year filing window is 261% above the prior three-year window. Annual volume peaked at 118 patent families in 2022 and has eased since, but counts for 2024–2026 are understated by publication lag and should be treated as lower bounds.
Hyundai Motor Company and Kia are the most active co-filers with 12 joint patent families. Hyundai also co-filed with several Korean universities including Hanyang University, Korea University, KAIST, and POSTECH. LG Energy Solution co-filed with the Regents of the University of California.
C23C (coating and surface deposition) holds only 17 patent records at 3% of the IPC mix, and H02J (power supply and grid systems) holds only 9 records at 1%. Both are adjacent to core cell performance but are sparsely represented relative to the dominant H01M battery-chemistry class.
The United States leads with 224 patent records, followed by Europe (EPO) with 127 and WIPO PCT with 83. India registers 39 records, likely driven by Ola Electric Mobility’s domestic filing activity. China holds only 19 records, which is low relative to Chinese companies’ global cell-manufacturing footprint.
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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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