Lithium-Sulfur Battery Electrolyte Patent Landscape 2026
Lithium-Sulfur Battery Electrolyte Patent Landscape in 2026
The lithium-sulfur battery electrolyte field is in a growth stage, with a 67% rise in filings over the recent window and Lyten holding a commanding lead at 39 patent families — nearly double its nearest rival. Activity is concentrated among a small set of corporate and university filers, with China dominating filings by jurisdiction and the core battery-cell IPC class absorbing the vast majority of coverage.
Lyten leads a concentrated but rapidly expanding field
Lyten heads the top five filers account for 43% of the combined output of the hundred largest filers, signaling meaningful but not extreme concentration.
A clear two-tier structure is visible: Lyten and LG Energy Solution sit well above the third-ranked Tsinghua University, which in turn leads a large second tier of academic institutions and smaller companies clustered in the single-digit range. The gap between the top two corporate filers and the rest suggests that first-mover advantage is already forming.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Lyten Inc. | 39 | |
| 2 | LG Energy Solution Ltd. | 23 | |
| 3 | Tsinghua University | 19 | |
| 4 | Central South University | 13 | |
| 5 | Beijing Institute of Technology | 6 | |
| 6 | Beijing Qichen Zoukai Technology Co., Ltd. | 5 | |
| 7 | China Jiliang University | 5 | |
| 8 | University of Pittsburgh of the Commonwealth System of Higher Education | 5 | |
| 9 | Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 4 | |
| 10 | HUAZHONG UNIV OF SCI & TECH | 4 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Suzhou Dejia Energy Technology Co., Ltd. | 4 | |
| 12 | CHINA PETROLEUM & CHEMICAL CORP | 4 | |
| 13 | Sinopec Research Institute of Petroleum Processing Co., Ltd. | 4 | |
| 14 | Chengdu New Keli Chemical Science Co., Ltd. | 3 | |
| 15 | The Trustees of Columbia University in the City of New York | 3 | |
| 16 | SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD … | 3 | |
| 17 | KUNMING UNIV OF SCI & TECH | 3 | |
| 18 | Inner Mongolia University for the Nationalities | 3 | |
| 19 | Hefei Guoxuan High-Tech Power Energy Co., Ltd. | 3 | |
| 20 | Zhengzhou University | 2 |
Lyten’s position reflects a deliberate IP-accumulation strategy — its 39 families represent roughly 20% of all 195 patent families in scope. LG Energy Solution’s 23 families indicate sustained corporate investment, while the strong university presence (Tsinghua, Central South, Beijing Institute of Technology) signals that foundational research is still feeding the pipeline.
The most recent 18–24 months of filings are likely under-counted due to publication lag; current totals for 2024–2025 should be interpreted as a floor rather than a ceiling. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing volume expanding; battery-cell chemistry dominates the technology mix
Annual filing volumes and IPC composition together reveal both the pace of competitive entry and the degree to which the field remains anchored to core battery chemistry versus emerging adjacent disciplines.
Annual filing trend
Filings were moderate in 2017–2018, dipped in 2019–2020, then surged to 34 in both 2021 and 2022. The 2023 count of 27 and the 2024 count of 34 indicate sustained activity, while the low 2025 figure reflects publication lag rather than a real drop. The overall multi-year growth rate of 67% confirms a field in expansion.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells and fuel cells) accounts for the overwhelming majority of records, confirming that electrolyte innovation is pursued almost exclusively through core battery-chemistry claims. Adjacent classes — man-made filament spinning (D01D), heterocyclic compounds (C07D), and woven fabrics (D03D) — each appear in only a handful of records, marking them as sparse but potentially differentiated entry points.
↗ 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.
Lithium sulfur battery electrolyte solution and li…
A lithium sulfur battery electrolyte solution according to the present invention comprises a first component, a second component, and an organic solvent, and when the first component is a lithium polysulfide, the second component is lithium bis(fluorosulfonyl)imide, and the concentration of lithium bis(fluorofulsonyl) imide is denoted by A, a relational… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Electrolyte additives for lithium sulfur rechargea… | 80 |
| 2 | Electrolyte additives for lithium-sulfur batteries | 52 |
| 3 | 一种伪高浓度酯类锂硫电池电解液及锂硫电池 | 45 |
| 4 | 锂硫电池电解液及包含这种电解液的锂硫电池 | 34 |
| 5 | Nonaqueous electrolyte secondary battery | 33 |
| 6 | 锂硫电池电解液及其制备方法以及使用所述电解液的电池 | 31 |
| 7 | Electrolyte additives for lithium sulfur rechargea… | 29 |
| 8 | 一种稀释的混合锂盐的锂硫电池电解液 | 23 |
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 strategy
The combination of a growth-stage lifecycle, a two-tier applicant structure, active university-industry collaboration, and strong. China-side filing activity together define the strategic landscape for new entrants and incumbents alike.
Growth stage with sustained filing momentum
The field is classified as Growth, with annual filings rising 67% over the recent window and no indication that volume has eased from its 2021 peak on a multi-year basis. This positions lithium-sulfur electrolyte IP as an area where early and sustained filing can still establish meaningful positions. New entrants have a narrowing but real window to stake claims before the field matures.
Growth stageModerate concentration with a pronounced leader gap
The top five filers hold 43% of the combined output of the hundred largest filers, and Lyten alone accounts for a disproportionate share. LG Energy Solution is the only other entity in the 20+ family range. Below that, most applicants hold fewer than ten families, suggesting that the field remains accessible to entrants willing to build focused portfolios. The risk is that Lyten’s lead may be sufficient to restrict freedom to operate in core electrolyte formulation claims.
Moderate concentrationTsinghua University anchors the most active co-filing network
The most active co-filing pairs all involve Tsinghua University: it co-filed four patent families each with Jiangsu Huadong Institute of Li-Ion Battery, Sinopec Research Institute of Petroleum Processing, and China Petroleum and Chemical Corporation, and two families with an Ordos carbon-neutrality research entity. Suzhou University also co-filed once with its Zhangjiagang Industrial Technology Research Institute. This pattern suggests that university-to-industry technology transfer, particularly through Tsinghua, is a primary mechanism for moving research into commercial IP.
University-industry linksChina dominates filings; US and PCT offer secondary reach
China accounts for 124 patent records, the United States for 51, and WIPO (PCT) for 18, with the European Patent Office at 10. South Korea, Taiwan, and a handful of other jurisdictions each hold fewer than five records. The China-heavy profile reflects both the concentration of academic applicants and the commercial ambitions of Chinese battery manufacturers. For non-Chinese players, PCT and EPO filing routes remain the primary mechanism for multi-market protection.
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 |
|---|---|---|
| Tsinghua University | Jiangsu Huadong Institute of Li-Ion Battery Co., Ltd. | 4 |
| Tsinghua University | Sinopec Research Institute of Petroleum Processing Co., Ltd. | 4 |
| Tsinghua University | China Petroleum and Chemical Corporation (Sinopec) | 4 |
| Tsinghua University | Ordos Carbon Neutrality Research and Application Co., Ltd. | 2 |
| Soochow University | Soochow University Zhangjiagang Industrial Technology Research Institute | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Lyten leads on volume; LG Energy Solution holds the closest corporate challenge
Two corporate filers stand clearly above the field. Lyten is the dominant force by family count and momentum, while LG Energy Solution brings deep electrochemistry expertise from its broader battery portfolio.
Lyten
Lyten holds 39 patent families — the largest portfolio in this space — concentrated entirely in the core H01M battery-cell and electrode subclasses (H01M 10 and H01M 4), with additional coverage in H01M 50 structural components. Its momentum is classified as a new entrant with a strongly ascending trajectory (36 families in the recent period), indicating that most of this portfolio was built rapidly and recently. This suggests an aggressive IP-capture strategy rather than an incremental build.
families: 39LG Energy Solution
LG Energy Solution holds 23 patent families focused on H01M 10 and H01M 4, reflecting its established position in commercial lithium-ion and next-generation cell chemistry. Its recent-period trend shows a 72% decline from prior levels, which may reflect portfolio consolidation or a strategic shift rather than reduced interest. As the only major Korean industrial filer in the top tier, it represents the primary established-manufacturer counterweight to Lyten’s startup-driven accumulation.
families: 23| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Lyten Inc. | 36 | ▲ new entrant |
| LG Energy Solution Ltd. | 5 | ▼ -72% |
| Tsinghua University | 11 | ▲ new entrant |
| Beijing Institute of Technology | 4 | ▲ new entrant |
Sparse fiber and heterocyclic chemistry branches adjacent to the dominant class
Outside the dominant H01M battery-chemistry cluster, a small number of records appear in fiber-manufacturing and organic-chemistry IPC classes. These branches are underserved relative to the core and may represent areas where differentiated approaches have yet to attract sustained filing.
D01D · Man-made filament spinning
Only four patent records appear in this class, representing roughly 2% of the technology composition. The technical connection is plausible: electrospun or melt-spun fiber membranes and separators are relevant to electrolyte confinement in lithium-sulfur cells. The University of Pittsburgh’s applicant-tech profile already shows four D01D5 records alongside its battery-chemistry filings, suggesting a viable entry path via separator or gel-polymer electrolyte fabrication approaches. Any entrant would need to demonstrate clear novelty relative to the Pittsburgh work.
Search this in Eureka →C07D · Heterocyclic compounds
Only two patent records appear in the heterocyclic-compounds class. Heterocyclic solvents and ionic-liquid electrolyte components — such as imidazolium or pyrrolidinium salts — are chemically relevant to lithium-sulfur electrolyte formulation, particularly for polysulfide suppression. The extremely low filing count in C07D suggests that this synthetic-chemistry angle has not yet attracted dedicated IP coverage from any major filer. Whether this reflects a deliberate gap or simply an absence of viable approaches requires further technical investigation; on the evidence available, it is an observation of sparsity rather than a confirmed opportunity.
Search this in Eureka →How leaders differ by technology route across IPC subclasses
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 | D01D 5 · Man-made filament spinning |
|---|---|---|---|---|---|
| Lyten Inc. | Strong · 39 | Strong · 38 | Moderate · 17 | Absent | Absent |
| LG Energy Solution Ltd. | Strong · 22 | Strong · 20 | Absent | Absent | Absent |
| Tsinghua University | Strong · 19 | Emerging · 3 | Absent | Absent | Absent |
| University of Pittsburgh of the Commonwealth System of Higher Education | Strong · 5 | Strong · 3 | Moderate · 2 | Emerging · 1 | Strong · 4 |
| Central South University | Strong · 13 | Absent | Absent | Absent | Absent |
| Beijing Institute of Technology | Strong · 6 | Absent | Absent | Absent | Absent |
| Shenzhen Qichen New Energy Technology Co., Ltd. | Strong · 5 | Absent | Absent | Absent | Absent |
Frequently asked questions
The corpus contains 195 patent families in scope. This represents the deduplicated family-level count across all jurisdictions included in the analysis.
Lyten holds 39 patent families, the largest portfolio in this space, followed by LG Energy Solution with 23 families and Tsinghua University with 19 families. Lyten’s portfolio was built primarily in the recent filing window, reflecting a new-entrant accumulation strategy.
China is the leading jurisdiction by patent records, followed by the United States and WIPO (PCT). The Europe Patent Office holds a smaller but non-trivial share. Note that a single patent family can be filed in multiple jurisdictions, so record counts across offices can exceed the total family count.
The recent filing window shows 67% growth. The field is classified as Growth-stage. The most recent 18–24 months of data are subject to publication lag and current figures for 2024–2025 should be treated as a floor.
Tsinghua University leads university filers with 19 patent families and is also the most active co-filer, with joint filings alongside Jiangsu Huadong Institute of Li-Ion Battery, Sinopec Research Institute of Petroleum Processing, and China Petroleum and Chemical Corporation. Central South University (13 families) and Beijing Institute of Technology (6 families) are the next most active academic filers.
Yes, several adjacent IPC classes have very sparse coverage: man-made filament spinning (D01D, four records), heterocyclic compounds (C07D, two records), chemical filament and fibre features (D01F, two records), and woven fabrics (D03D, two records). These observations of sparsity suggest that fiber-based electrolyte membranes and heterocyclic solvent chemistry have not yet attracted concentrated IP activity, though whether they represent viable entry points requires technical due diligence beyond the filing counts alone.
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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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