SOPHIA ANTIPOLIS, France – November 17, 2025 │As global R&D in Li-ion batteries accelerates, silicon anode technology has become a central area of innovation. KnowMade’s Patent Monitoring Service for Silicon Anode Li-ion Batteries helps you stay ahead by tracking the latest breakthroughs and key players in the industry.
Varied Technological Advances and Heightened Strategic Interest in Silicon Anode Technologies
Patent activity during the third quarter of 2025 reflects strong and diverse innovation dynamics in silicon anode Li-ion battery technology, with around 800 new patent families (inventions) published.
During Q3 2025, the leading patent applicants included COSMX, ATL, EVE Energy, and LG Energy Solution (LGES). These companies demonstrate a strong presence across multiple segments of the value chain, reflecting their integrated innovation strategies (Figure 1). Notably, Honda, best known as a global vehicle manufacturer, also appears among the applicants filing patents related to silicon-based anodes and battery cells incorporating silicon anode. Similar to other automakers identified in our previous quarterly patent monitoring reports, this trend underscores the growing strategic importance of upstream battery technologies for vehicle manufacturers.
Figure 1: Distribution of new patent families related to silicon anode Li-ion batteries published in Q3 2025, and notable patent applicants (non-exhaustive list). Note that a patent family can belong to multiple segments.
In Q3 2025, several companies entered the intellectual property (IP) landscape by filing their first patents related to silicon anode Li-ion battery technologies, marking the beginning of their IP activities in this field. These include LIBAMA Power, a U.S. start-up founded in 2017 that developed the “Advanced Metal Anode (AMA) Technology” platform, designed to enhance lithium batteries and other metal-based systems such as sodium-ion, zinc, and aluminum batteries. Another new entrant is RadiSurf, a Danish spin-off from Aarhus University established in 2015, specializing in advanced interface engineering.
Latest Developments in Silicon-Based Anode Materials: Progress by Start-Ups and Leading Companies
RadiSurf’s patent application WO2025/145193 introduces a scalable method to covalently graft polymer brushes onto multifunctional silicon and carbon-based particles using specially designed moieties with anchoring components and polymerization initiation or functional groups (Figure 2). The polymer brushes form stable, tunable interfaces that could enhance the particles’ solubility, passivation, and electrochemical performance. These composite particles could exhibit improved resistance to oxidation, better compatibility with diverse solvents, and potential to maintain electrode integrity during cycling.
Figure 2: Schematic cross section of a decorated Si-particle (RadiSurf, WO2025/145193).
Monitoring recent patent filings from major companies further underscores the growing pace of innovation in silicon-based materials for Li-ion battery anodes. For instance, recently published patent applications from LG Energy Solution and ATL mainly concentrate on advanced silicon-based composite designs (see Figure 3).
In patent application WO2025/143848, LG Energy Solution (LGES) disclosed an anode active material consisting of porous composite particles made of silicon and silicon oxide (SiOx, where 0 < x ≤ 2) which are produced by reducing SiOx with magnesium (Mg), followed by the removal of byproducts through acid treatment. The resulting particles feature pores that are partially or completely filled and coated with carbon.
This structure can enhance the initial coulombic efficiency, capacity, and cycling stability of batteries.
In parallel, ATL proposed a silicon-carbon composite material featuring a porous carbon substrate core embedded with elemental silicon and silicon carbide (SiC) and enclosed by a carbon shell (WO2025/189399). This design may help alleviate volume expansion, improve ion diffusion, and maintain structural stability during cycling.
Figure 3: Notable inventions disclosed by LGES (WO2025/143848) and ATL (WO2025/189399) during Q3 2025.
Gain a Competitive Edge with KnowMade’s Exclusive Silicon Anode Patent Intelligence
Maintaining a competitive edge in this rapidly evolving sector demands up-to-date intelligence, and KnowMade’s Silicon Anode Li-ion Batteries Patent Monitoring Service provides exactly that. Published quarterly, the service combines a structured patent database with in-depth analytical reports, allowing you to follow competitors’ R&D and IP strategies while uncovering new opportunities for technological innovation and business expansion.
A key advantage of this monitoring service is year-round access to our analysts, offering the flexibility to request additional research on specific technologies or company patent portfolios, and to customize the service to your needs by focusing on particular players and/or market segments. For subscription details and further information, please contact us at contact@knowmade.fr.
Press contact
contact@knowmade.fr
Le Drakkar, 2405 route des Dolines, 06560 Valbonne Sophia Antipolis, France
www.knowmade.com
About the author
Arnaud Capgras works at KnowMade in the field of Materials Chemistry and Energy Storage. He holds a Chemistry-Process Engineering Degree from the Chemistry and Chemical Engineering School of Lyon (CPE Lyon, France). He also holds the International Industrial Property Studies Diploma (Patents) from the CEIPI (Strasbourg, France).
About KnowMade
KnowMade is a technology intelligence and IP strategy firm specializing in the analysis of patents and scientific publications. We assist innovative companies, investors, and research organizations in understanding the competitive landscape, anticipating technological trends, identifying opportunities and risks, improving their R&D, and shaping effective IP strategies.
KnowMade’s analysts combine their strong technology expertise and in-depth knowledge of patents with powerful analytics tools and methodologies to transform patent and scientific data into actionable insights to support decision-making in R&D, innovation, investment, and intellectual property.
KnowMade has solid expertise in Semiconductors and Packaging, Power Electronics, Batteries and Energy Management, RF and Wireless Communications, Photonics, MEMS, Sensing and Imaging, Medical Devices, Biotechnology, Pharmaceuticals, and Agri-Food.