SOPHIA ANTIPOLIS, France – August 29, 2025 │As global research and development in Li-ion batteries accelerates, silicon anode technology is becoming a major focus as a key innovation area. KnowMade’s Patent Monitoring Service for Silicon Anode Li-ion Batteries enables you to stay ahead of the curve by tracking cutting-edge advancements and leading industry stakeholders.
Diversified Inventions and Rising Strategic Interest in Silicon Anode Technologies
The Q2 2025 results reveal robust and diversified innovation activity in the field of silicon anode Li-ion battery technology, with around 990 newly published patent families (inventions).
The leading patent applicants that stand out during this quarter are LG Energy Solution (LGES), COSMX, ATL and CATL. These organizations display a strong footprint across several segments of the value chain, highlighting their integrated approaches to innovation.
Notably, General Motors, BYD and Toyota, primarily recognized as global automotive manufacturers, are also listed among the patent holders in the anode segment and other battery components (such as electrolytes). Furthermore, two of them are present in the anode material segment as well. This underlines the rising strategic relevance of upstream battery technologies for vehicle makers (see Figure 1 below).
Figure 1: Distribution of new patent families related to Silicon Anode Li-ion Batteries published in Q2 2025, and notable patent applicants (non-exhaustive list). Note that a patent family can belong to multiple segments.
In Q2 2025, several players entered the IP landscape by filing their first patents focused on silicon anode Li-ion battery technology, marking the beginning of their IP activity in this field. Among them are SiLi-ion, an American start-up founded in 2019 that leverages technology licensed from the University of Minnesota and the University of California, Riverside, and the German battery manufacturer CustomCells.
Recent Inventions in Silicon-Based Anode Materials: Start-up and Key Players Advances
SiLi-ion’s patent application WO2025/129140, co-filed with the University of California and published this quarter, addresses critical limitations of silicon-based anodes in lithium-ion batteries, notably their poor cycling stability caused by extreme volume changes during lithiation, which leads to mechanical degradation and repeated formation of unstable solid electrolyte interphases (SEI). To overcome these challenges, the inventors propose an innovative anode material (see Figure 2 below) composed of micron-sized assemblies of ultrasmall silicon nanoparticles (less than ~12 nm) interspersed with nanopores (less than ~10 nm). These super-assembled structures are produced via solvent dispersion followed by evaporation-induced assembly, which maintains structural integrity and mitigates mechanical stress and SEI breakdown. This design aims to enhance the longevity and commercial viability of high-capacity silicon anodes.
Figure 2: Preparation of hierarchically structured ultrasmall silicon particlepore assemblies in accordance with the present technology.
Tracking also recent patent filings from leading companies highlights the intensifying innovation activity in silicon-based materials for Li-ion battery anodes. For example, newly published patent applications from CATL and COSMX primarily focus on advanced silicon-carbon composite designs (see Figure 3).
CATL has developed a silicon-carbon composite with an engineered structure involving primary particles (i.e. silicon-based material embedded in a carbon skeleton) and a one-dimensional conductive agent distributed between them. This configuration could reduce battery charging time and improve both the rate performance and cycle performance of the battery.
Meanwhile, COSMX is developing silicon-carbon particles with concave parts on their surfaces. The aim of this material is to increase the reaction surface area, enhance SEI adhesion, and provide mechanical buffer zones that accommodate expansion during charge-discharge cycles.
Figure 3: Notable inventions disclosed by CATL (WO2025/107546) and COSMX (CN119890255) during this Q2 2025.
Track R&D and IP Strategies with KnowMade’s Expert Analysis
Staying competitive in this fast-moving sector requires timely intelligence, and KnowMade’s Silicon Anode Li-ion Batteries Patent Monitoring Service delivers just that. Issued every quarter, the service combines a structured database with detailed analytical reports, enabling you to track competitors’ R&D and IP strategies while identifying fresh opportunities for technological advancement and business growth. The added value of this monitoring service lies in year-round access to the analyst, providing opportunities to request additional research on specific technologies or companies’ patent portfolios, and to tailor the service to your needs by including the specific players and/or specific segments you wish to monitor. For subscription inquiries and more information, contact us at contact@knowmade.fr.
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About KnowMade
KnowMade is a Technology Intelligence and IP Strategy consulting company specialized in analysis of patents and scientific information. The company helps innovative companies and R&D organizations to understand their competitive landscape, follow technology trends, and find out opportunities and threats in terms of technology and patents.
KnowMade’s analysts combine their strong technology expertise and in-depth knowledge of patents with powerful analytics tools and methodologies to turn patents and scientific information into business-oriented report for decision makers working in R&D, Innovation Strategy, Intellectual Property, and Marketing. Our experts provide prior art search, patent landscape analysis, scientific literature analysis, patent valuation, IP due diligence and freedom-to-operate analysis. In parallel the company proposes litigation/licensing support, technology scouting and IP/technology watch service.
KnowMade has a solid expertise in Compound Semiconductors, Power Electronics, Batteries, RF Technologies & Wireless Communications, Solid-State Lighting & Display, Photonics, Memories, MEMS & Solid-State Sensors/Actuators, Semiconductor Manufacturing, Packaging & Assembly, Medical Devices, Medical Imaging, Microfluidics, Biotechnology, Pharmaceutics, and Agri-Food.