Lithium-Ion Battery Cathode Material Patent Landscape
Lithium-Ion Battery Cathode Material Patent Landscape in 2026
The lithium-ion battery cathode material space encompasses 905 patent families, led by Central South University with 44 patent families, in a moderately fragmented field where the top five filers hold 15% of the top hundred filers’ combined total. Annual filings peaked in 2018 and have eased since, signalling a maturing field where incremental differentiation and adjacent technical routes are gaining relative importance.
Chinese universities and industrial players dominate a moderately fragmented applicant field
Central South University leads all applicants with 44 patent families, followed by Enovix Corporation and Sachem Inc. (32 each), and Zhejiang University and Hefei Guoxuan High-Tech Power Energy (26 each). The ranking is dominated by Chinese academic institutions and domestic battery manufacturers, with a handful of US-based commercial entrants in the top tier.
The top five filers account for 15% of the hundred largest filers’ combined total, indicating a moderately fragmented competitive structure with no single organization holding a commanding share. A meaningful second tier — BTR New Material Group, GM Global Technology Operations, Tsinghua University, BYD, and Molecular Rebar Design — is clustered within the 18–23 patent-family range, suggesting active competition across multiple innovation vectors.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Central South University | 44 | |
| 2 | Enovix Corporation | 32 | |
| 3 | Sachem Inc. | 32 | |
| 4 | Zhejiang University | 26 | |
| 5 | Hefei Guoxuan High-Tech Power Energy Co., Ltd. | 26 | |
| 6 | BTR New Material Group Co., Ltd. | 23 | |
| 7 | GM Global Technology Operations LLC | 22 | |
| 8 | Tsinghua University | 21 | |
| 9 | BYD Co., Ltd. | 19 | |
| 10 | Molecular Rebar Design LLC | 18 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Honeycomb Battery Co. | 17 | |
| 12 | AIR PROD & CHEM INC | 17 | |
| 13 | Beijing Easpring Material Technology Co., Ltd. | 17 | |
| 14 | Regents of the University of California | 17 | |
| 15 | Advanced Lithium Electrochemistry Co., Ltd. | 16 | |
| 16 | Guizhou Zhenhua E-Chem Inc. | 16 | |
| 17 | Nano One Materials Corp. | 15 | |
| 18 | SHAANXI UNIV OF SCI & TECH | 14 | |
| 19 | South China University of Technology | 14 | |
| 20 | Wuhan University of Technology | 14 |
The breadth of academic institutions at the top of the ranking (Central South University, Zhejiang University, Tsinghua University, Shaanxi University of Science and Technology, South. China University of Technology, Wuhan University of Technology) implies that foundational materials science remains a significant driver of new IP, while industrial applicants such as Hefei Guoxuan, BTR New Material Group, and BYD translate that research into commercially oriented filings.
Filings from 2024 and 2025 are subject to publication lag and are likely under-counted; the recent low annual totals should not be interpreted as a steeper decline than the trend line warrants. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filings peaked in 2018 and have moderated; H01M electrochemistry is dominant but nanomaterials and inorganic chemistry are active adjacent branches
The filing trend and technology composition charts together reveal a field that expanded sharply to a 2018 peak, has since moderated, and is concentrated in electrochemistry patent classes while drawing meaningful activity from nanotechnology and inorganic compounds.
Annual filing trend
Annual patent family filings rose from 171 in 2017 to a peak of 191 in 2018, then declined through 2022 (62 families). A partial recovery appeared in 2023 (85 families) before counts fall again in 2024–2025, though those years are likely under-counted due to publication lag and should not be read as continuation of a structural decline. The overall multi-year window shows a net contraction of 33% from the recent period versus the prior comparable period.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells and fuel cells) accounts for the large majority of records, reflecting the core electrochemistry focus of the field. C01G (compounds of other metals) and B82Y (nanotechnology applications) form the next largest branches, indicating sustained activity in transition-metal precursor chemistry and nano-engineered cathode structures. C01B (non-metallic elements and inorganic compounds) and C22B (metal extraction and refining) represent thinner but technically significant branches, the latter reflecting growing interest in precursor sourcing and recycling.
↗ 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.
Method for producing precursor of lithium ion batt…
A method for producing a precursor of a lithium ion battery cathode active material from lithium ion battery waste includes: an acid leaching step of leaching metals in battery powder obtained from lithium ion battery waste with an acid to obtain a metal-containing solution containing cobalt ions and/or nickel ions; a cobalt extraction step of extracting… (excerpt from the patent abstract)
Open this patent in Eureka →| # | Patent | Citations |
|---|---|---|
| 1 | Lithium-ion rechargeable battery based on nanostru… | 277 |
| 2 | Flotation method for recovering lithium-ion batter… | 256 |
| 3 | 锂离子电池用石墨烯/金属氧化物复合负极材料及制备 | 142 |
| 4 | Ferric phosphate and methods of preparation thereof | 133 |
| 5 | Composite graphite particles for rechargeable lith… | 108 |
| 6 | Microstructured electrode structures | 107 |
| 7 | Electrode Composition for Battery | 106 |
| 8 | 一种石墨烯/硅锂离子电池负极材料及制备方法 | 101 |
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 readings — maturity, concentration, collaboration, and geography — shape where new entrants or incumbents can most efficiently deploy R&D resources in cathode material innovation.
Past-peak field with selective renewal
Annual filings have eased back from the 2018 peak, placing this field in a declining phase on an annual-volume basis, even though a partial recovery was visible in 2023. For R&D planners, this signals that broad-scope cathode chemistry filings face higher prior-art density; differentiation through narrower, performance-specific claims or adjacent process and recycling IP is more likely to yield freedom to operate. The 2024–2025 figures are publication-lag affected and should not be used to confirm the rate of decline.
Lifecycle: DecliningFragmented enough for targeted entry
With the top five filers holding 15% of the hundred largest filers’ combined total, no single entity controls the space. The gap between the leader (Central South University, 44 patent families) and the second-tier cluster (18–32 families) is meaningful but not insurmountable. New entrants with focused claims in under-served branches — such as C22B metal refining or B01J catalytic processing — face a less crowded prior-art environment than in the core H01M electrochemistry classes.
Moderate fragmentationCo-filing is limited and mostly domestic
The most active co-filing pair is Beijing Easpring Material Technology and Jiangsu Dangsheng Material Technology with 3 joint patent families, reflecting close corporate-family coordination. Zhejiang University and Zhejiang University of Technology co-filed 2 families. Central South University has single-family collaborations with Hunan Zhengyuan Energy Storage Materials and Devices Research Institute and with Shenzhen Guotuo Intelligent Machinery. All observed co-filing is China-domestic; cross-border academic-industry collaboration is not evident in the current evidence.
Domestic co-filing onlyChina is the primary filing jurisdiction; US and Europe are distant second-tier markets
China leads all jurisdictions by a wide margin, followed by the United States and Europe (EPO). WIPO PCT filings and South Korea represent a thinner but strategically meaningful layer for applicants seeking broader protection. The concentration in China reflects both the nationality of most top applicants and the scale of domestic battery manufacturing. Applicants targeting global supply-chain positions should assess whether their China-first filings have been extended to US, EPO, and PCT routes given the relatively low counts in those offices.
China-dominantGo 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 |
|---|---|---|
| Beijing Easpring Material Technology Co., Ltd. | Jiangsu Dangsheng Material Technology Co., Ltd. | 3 |
| Zhejiang University | Zhejiang University of Technology | 2 |
| Central South University | Hunan Zhengyuan Energy Storage Materials and Devices Research Institute | 1 |
| Central South University | Shenzhen Guotuo Intelligent Machinery Co., Ltd. | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Central South University and Enovix Corporation lead with distinct strategic emphases
The top two applicants illustrate the academic-vs-commercial divide in this landscape: Central South University brings broad cathode and cell chemistry coverage, while Enovix Corporation focuses on integrated cell design with a crossover into capacitor-adjacent energy storage.
Central South University
Central South University holds 44 patent families, the largest position in this corpus, with technology emphasis concentrated in H01M 4 (electrode materials), H01M 10 (battery systems), and B82Y 30 (nanotechnology). Its momentum is flagged as a new entrant in the recent filing window, meaning its visible recent-period filings (2 families) are low relative to its cumulative total — consistent with a university whose earlier bulk of filing activity predates the recent window. The breadth of its IPC coverage positions it as a foundational IP holder across both cathode composition and nano-engineering.
families: 44Enovix Corporation
Enovix Corporation holds 32 patent families and is flagged as a new entrant in the recent filing window with 3 recent-period families, indicating its portfolio is accumulating from a low prior base. Its technology emphasis spans H01M 4 (electrode materials), H01M 10 (battery systems), and H01G 4 (capacitors), suggesting an integrated cell-architecture approach that extends beyond pure cathode chemistry into energy storage device design — a differentiated angle relative to the predominantly materials-science-focused academic leaders.
families: 32| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Central South University | 2 | ▲ new entrant |
| Enovix Corporation | 3 | ▲ new entrant |
| Hefei Guoxuan High-Tech Power Energy Co., Ltd. | 3 | ▲ new entrant |
| GM Global Technology Operations LLC | 6 | ▲ new entrant |
| Beijing Easpring Material Technology Co., Ltd. | 3 | ▼ -77% |
Under-served branches in metal refining, catalytic processing, and capacitor-adjacent design
Several IPC classes adjacent to the dominant H01M electrochemistry core show relatively sparse coverage, which — where technically plausible — may represent areas where new filings face lower prior-art density.
C22B · Metal extraction and refining
C22B appears in the corpus with a 2% share of records relative to the H01M core, reflecting activity in cathode precursor sourcing and battery recycling. As critical-mineral supply chains tighten and end-of-life cathode recovery becomes commercially imperative, this branch has plausible technical value for applicants working on closed-loop lithium, cobalt, nickel, and manganese recovery. Entry paths include novel hydrometallurgical or pyrometallurgical processes for precursor preparation or black-mass recycling that are distinct from existing H01M-focused claims.
Search this in Eureka →B01J · Chemical and physical processes and catalysis
B01J holds a 1% share of records in this corpus, indicating sparse coverage in catalytic and reactor-engineering aspects of cathode synthesis. Techniques such as sol-gel, co-precipitation optimization, and surface-catalytic coating methods for high-nickel NMC or LMFP cathodes could be protected here with lower prior-art competition than in the H01M core. Applicants with process chemistry expertise in reaction engineering have a realistic entry path through claims focused on synthesis reactor design or catalytic surface-treatment steps.
Search this in Eureka →How leading applicants differ across technology routes
Strength of each leader across the main technology routes.
| Player | H01M 4 · Batteries, cells & fuel cells | H01M 10 · Batteries, cells & fuel cells | B82Y 30 · Nanotechnology applications | C01G 53 · Compounds of other metals | B82Y 40 · Nanotechnology applications |
|---|---|---|---|---|---|
| Central South University | Strong · 48 | Strong · 31 | Emerging · 7 | Absent | Emerging · 2 |
| Enovix Corporation | Strong · 27 | Strong · 26 | Moderate · 6 | Absent | Absent |
| Shaanxi University of Science and Technology | Strong · 24 | Strong · 15 | Moderate · 7 | Absent | Absent |
| BTR New Material Group Co., Ltd. | Strong · 24 | Strong · 15 | Absent | Absent | Absent |
| Molecular Rebar Design LLC | Strong · 20 | Strong · 14 | Absent | Absent | Absent |
| Sachem Inc. | Strong · 32 | Absent | Absent | Absent | Absent |
| Hefei Guoxuan High-Tech Power Energy Co., Ltd. | Strong · 27 | Absent | Emerging · 4 | Absent | Absent |
Frequently asked questions
The analysis covers 905 patent families. The most recent filing years (2024–2025) are subject to publication lag and are likely under-counted in that total.
Central South University leads with 44 patent families, followed by Enovix Corporation and Sachem Inc. with 32 each, and Zhejiang University and Hefei Guoxuan High-Tech Power Energy with 26 each.
Annual filing volume peaked in 2018 at 191 families and has eased since. The field is in a declining phase on an annual-volume basis, with a partial recovery visible in 2023. The most recent years are under-counted due to publication lag and should not be used to confirm the pace of decline.
China is the dominant filing jurisdiction, followed by the United States and Europe (EPO). WIPO PCT and South Korea form a thinner but strategically relevant layer for applicants seeking multi-market protection.
C22B (metal extraction and refining) and B01J (chemical and physical processes and catalysis) each hold relatively sparse positions in this corpus — 2% and 1% of records respectively — making them adjacent branches where new filings may face lower prior-art density, particularly for precursor refining and catalytic synthesis processes.
Co-filing activity is limited and entirely China-domestic in the current evidence. Beijing Easpring Material Technology and Jiangsu Dangsheng Material Technology are the most active co-filers with 3 joint families. Zhejiang University and Zhejiang University of Technology co-filed 2 families, and Central South University has single-family collaborations with two regional partners.
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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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