Silicon Anode Battery Patent Landscape 2026
Silicon Anode Battery Patent Landscape in 2026
Silicon anode battery IP is highly concentrated, with the top five ranked filers accounting for 76% of combined leading-filer volume and one specialist holding a commanding position. The field is still expanding on a multi-year basis, though annual volume has eased from its 2022 peak and the most recent filing years remain further understated by publication lag.
Nexeon and Sila Nanotechnologies dominate a sharply tiered field
The corpus spans 5,685 patent families in scope. Among the ranked filers, Sila Nanotechnologies leads with 549 patent families, followed by Nexeon with 429 — together the two specialists account for nearly half of the top-ten filers’ combined volume.
The top five ranked filers — Sila Nanotechnologies, Nexeon, LG Energy Solution, LG Chem, and BTR New Material Group — collectively represent 76% of the leading filers’ combined total, signaling sharp concentration among the front-runners. A second tier of challengers (CATL Consumer, General Motors, Samsung SDI, Zhuhai CosMX, and CATL) each hold between 85 and 159 patent families, well behind the top two specialists.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Sila Nanotechnologies | 549 | |
| 2 | Nexeon Limited | 429 | |
| 3 | LG Energy Solution | 232 | |
| 4 | LG Chem | 188 | |
| 5 | BTR New Material Group | 159 | |
| 6 | Amperex Technology Limited (ATL) | 128 | |
| 7 | General Motors Global Technology Operations LLC | 95 | |
| 8 | Samsung SDI | 90 | |
| 9 | Zhuhai CosMX Battery | 87 | |
| 10 | Contemporary Amperex Technology Co. Limited (CATL) | 85 |
The dominance of two dedicated silicon-anode material companies at the top suggests that pure-play specialists have moved earliest and fastest to build defensive IP positions, while diversified battery and chemical manufacturers form a broad but lower-density second tier.
Rankings and the corpus total are measured in patent families; technology-branch, jurisdiction, and route-matrix figures are at the patent-record level — a single family filing in multiple offices or classified under multiple IPC classes will appear more than once, so those counts can exceed the family total and should not be compared directly to it. The most recent 18–24 months of filings are further understated by publication lag.
Multi-year growth with a 2022 peak, anchored in core battery IP
The annual filing trend reveals sustained expansion over the past decade alongside a technology mix that is overwhelmingly concentrated in battery-cell fundamentals, with a set of enabling materials and nanotechnology branches playing supporting roles.
Annual filing trend
Filings climbed from 417 records in 2017 to a peak of 843 in 2022, then eased to 794 in 2023 and 757 in 2024. The 2025–2026 figures are substantially understated by publication lag and should not be read as a real decline. On a multi-year basis the field has grown roughly 25% in the recent window versus the prior comparable window, confirming that the Growth stage characterization is warranted despite the post-2022 moderation in annual volume.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells and fuel cells) dominates at the patent-record level with 7,456 records, dwarfing all adjacent classes. C01B (Non-metallic elements and inorganic compounds, primarily silicon chemistry) is the second most active class at 954 records, reflecting the centrality of silicon material synthesis. B82Y (Nanotechnology applications) contributes 379 records, signaling meaningful but secondary activity in nanoscale engineering of anode materials. All remaining classes each contribute fewer than 210 records, indicating that enabling fields such as coating processes, adhesives, and polymer science remain relatively sparse.
↗ Hover for values · click a bar to ask EurekaFoundational and most-cited patents
The most-cited families that anchor this space. Hover a row and click to open it in Eureka.
A Porous Silicon-Carbon Anode Electrode Material, …
The present disclosure provides a porous silicon-carbon anode electrode material. The anode electrode material has a core-shell structure and the core-shell structure sequentially includes a porous sparse silicon-carbon core, a transition layer, a dense silicon-carbon layer, and a carbon coating layer from inside to outside. Porous carbon of the porous… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Conductive nanocomposite-based electrodes for lith… | 418 |
| 2 | High Capacity Anode Materials for Lithium Ion Batt… | 302 |
| 3 | Method of depositing silicon on carbon materials a… | 278 |
| 4 | Electrochemical Energy Storage Systems and Methods | 218 |
| 5 | Structured silicon anode | 210 |
| 6 | Porous silicon based anode material formed using m… | 208 |
| 7 | Electrode material and compositions including same | 199 |
| 8 | Compositions Including Nano-Particles and a Nano-S… | 196 |
Ranked by total forward citations. Citation counts accrue over time, so this list favours older, broadly-cited patents and may include general-purpose work beyond the specific topic; treat it as foundational context rather than a current-activity ranking.
What the structure means for silicon anode R&D investment
Four structural observations — life-cycle stage, competitive concentration, collaboration patterns, and geographic distribution — together shape where new entrants can most efficiently deploy R&D resources.
Growth stage, annual volume easing from 2022 peak
The field sits in a Growth life-cycle stage: the recent three-year filing window sits well above the prior three-year window, reflecting a 25% multi-year expansion. Annual volume peaked in 2022 at 843 records and has moderated since, though publication lag makes the most recent years appear lower than they will ultimately prove to be. Late-stage entrants face an increasingly dense prior-art landscape in core H01M classes.
Growth stageTop-two specialists hold a large lead over diversified players
The top five ranked filers account for 76% of the leading filers’ combined family total, and the gap between rank-two (Nexeon, 429 families) and rank-three (LG Energy Solution, 232 families) is nearly as large as the gap between ranks three and ten. New entrants competing head-on in electrode design face substantial freedom-to-operate challenges from these leaders’ portfolios. Differentiation in enabling sub-fields or geographic white space offers a more accessible entry path.
High concentrationIndustry-academia partnerships concentrated among Korean players
The most active co-filing pair is BTR New Material Group with Huizhou Dingyuan New Energy (62 joint families), reflecting deep supply-chain integration in China. Samsung SDI and Samsung Electronics (Korea) account for 49 co-filed families, illustrating intra-group coordination. LG Energy Solution co-filed 20 families with the University of California Regents and 8 with Hanyang University, while LG Chem partnered with UNIST (9) and POSTECH (7) — indicating that Korean cell-makers are actively bridging academic silicon-material research into commercial IP. Nexeon and Wacker Chemie collaborated on 12 families, linking a silicon-anode specialist with a specialty-silicon chemical producer.
Ecosystem partnershipsUS leads filings; China and Europe are substantial secondary markets
At the patent-record level, the United States is the leading filing jurisdiction with 2,460 records, followed by China (1,652) and Europe via EPO (1,285). WIPO PCT filings (662) indicate that applicants are broadly seeking international coverage. India (230), Germany (186), and South Korea (146) represent meaningful secondary markets. The US dominance aligns with the presence of specialist companies and significant venture-backed activity; the China volume reflects both domestic innovators and foreign applicants seeking protection in the world’s largest battery-manufacturing market.
US-led, globally spreadGo 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 |
|---|---|---|
| BTR New Material Group | Huizhou Dingyuan New Energy Technology | 62 |
| Samsung SDI | Samsung Electronics | 49 |
| LG Energy Solution | The Regents of the University of California | 20 |
| Amperex Technology Limited (ATL) | Dongguan Amperex Technology Limited | 14 |
| Nexeon Limited | Wacker Chemie AG | 12 |
| LG Chem | UNIST (Ulsan National Institute of Science and Technology) | 9 |
| LG Energy Solution | Hanyang University | 8 |
| BTR New Material Group | Panasonic Corporation | 8 |
| LG Chem | POSTECH (Pohang University of Science and Technology) | 7 |
| LG Chem | Hanyang University ERICA Campus | 6 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Sila Nanotechnologies leads by volume; LG Energy Solution and BTR are the fastest-rising challengers
The top-ten applicants span dedicated silicon-anode specialists, diversified cell-makers, and materials companies, but their momentum trajectories diverge sharply — some leaders are contracting in recent filings while second-tier players are accelerating.
Sila Nanotechnologies
Sila Nanotechnologies holds 549 patent families — the largest portfolio in the ranking — concentrated almost entirely in H01M4 (electrode materials) and H01M10 (secondary batteries). Recent filing momentum shows a trend of –59% versus the prior period, suggesting the company may be consolidating its portfolio rather than expanding it at the same pace. Given its specialist focus, the existing portfolio represents a dense prior-art barrier in core silicon-composite anode design.
families: 549LG Energy Solution
LG Energy Solution ranks third with 232 patent families, split nearly evenly between H01M10 (cell systems) and H01M4 (electrode materials), and is one of the fastest-moving large-scale players with a recent filing trend of +60%. Its active co-filing with the University of California Regents (20 families) and Hanyang University (8 families) points to a deliberate strategy of importing academic research into commercial IP, which may accelerate its position in next-generation silicon-dominant cell chemistries.
families: 232| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Sila Nanotechnologies | 133 | ▼ -59% |
| Nexeon Limited | 91 | ▼ -24% |
| LG Energy Solution | 123 | ▲ +60% |
| BTR New Material Group | 75 | ▲ +134% |
| Amperex Technology Limited (ATL) | 47 | ▼ -24% |
| General Motors Global Technology Operations LLC | 37 | ▲ +37% |
| Samsung SDI | 16 | ▲ new entrant |
| Zhuhai CosMX Battery | 41 | ▲ +71% |
Under-served branches adjacent to the silicon anode core
Several IPC classes appear in the corpus at relatively low patent-record counts compared to the dominant H01M class, pointing to areas where the density of existing IP is lower and where targeted R&D could face less prior-art friction.
C23C · Coating and surface deposition
With 167 patent records, C23C is sparse relative to the 7,456 H01M records. Surface-coating approaches — such as atomic layer deposition or chemical vapor deposition of protective shells on silicon particles — are technically important for suppressing volume-expansion-driven degradation, which is the principal failure mode of silicon anodes. The comparatively low record count suggests that coating-process IP has not been systematically built out to the same depth as electrode-composition IP, and materials or equipment companies with coating expertise may find a realistic path to differentiated filings here.
Search this in Eureka →B82Y · Nanotechnology applications
B82Y accounts for 379 patent records — the third largest class in the corpus but still representing a small share of total records relative to H01M. Nanostructured silicon (nanowires, nanoparticles, porous nanoarchitectures) has demonstrated improved cycle life by accommodating volume expansion, and the most-cited patents in the corpus include work on porous silicon and nanocomposite electrodes. Despite its technical relevance, the record count suggests the nanotechnology branch remains comparatively under-developed relative to bulk electrode formulation, potentially offering entry points for groups with nanofabrication or nano-materials capabilities.
Search this in Eureka →How leaders differ by technology route
Strength of each leader across the main technology routes.
| Player | H01M 4 · Batteries, cells & fuel cells | H01M 10 · Batteries, cells & fuel cells | C01B 33 · Non-metallic elements & inorganic compounds | C01B 32 · Non-metallic elements & inorganic compounds | H01M 50 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| Sila Nanotechnologies | Strong · 502 | Strong · 359 | Emerging · 13 | Emerging · 9 | Emerging · 23 |
| Nexeon Limited | Strong · 425 | Strong · 239 | Emerging · 80 | Emerging · 36 | Absent |
| LG Energy Solution | Strong · 207 | Strong · 209 | Emerging · 24 | Absent | Emerging · 28 |
| LG Chem | Strong · 183 | Strong · 163 | Moderate · 53 | Emerging · 9 | Absent |
| BTR New Material Group | Strong · 157 | Strong · 86 | Emerging · 11 | Emerging · 12 | Absent |
| Amperex Technology Limited (ATL) | Strong · 96 | Strong · 98 | Absent | Emerging · 9 | Absent |
| General Motors Global Technology Operations LLC | Strong · 89 | Strong · 77 | Absent | Absent | Absent |
Frequently asked questions
The corpus contains 5,685 patent families in scope globally, spanning filings from 2017 through 2026, with the most recent years understated due to publication lag.
Sila Nanotechnologies leads all ranked filers with 549 patent families, followed by Nexeon with 429. Both are dedicated silicon-anode specialists rather than diversified battery manufacturers.
At the patent-record level, the United States is the leading jurisdiction with 2,460 records, followed by China (1,652) and Europe via the EPO (1,285). WIPO PCT filings (662) indicate broad multi-jurisdictional coverage strategies among leading applicants.
The field is characterized as Growth: the recent three-year filing window sits roughly 25% above the prior comparable window. Annual volume peaked in 2022 at 843 records and has moderated since, but the most recent years are further understated by publication lag, so this should not be read as a real decline.
The most active co-filing pairs are BTR New Material Group with Huizhou Dingyuan New Energy (62 joint families) and Samsung SDI with Samsung Electronics (49 families). LG Energy Solution has co-filed with the University of California Regents (20 families) and LG Chem with UNIST (9 families), reflecting significant industry-academia collaboration among Korean battery makers.
C23C (Coating and surface deposition) and B82Y (Nanotechnology applications) are the most technically relevant adjacent branches with relatively low record counts — 167 and 379 patent records respectively — compared to the 7,456 records in the dominant H01M class. These observations suggest lower prior-art density in coating processes and nanostructured anode architectures, though a thorough freedom-to-operate analysis is needed before drawing investment conclusions.
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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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