Lankwitzer Coating Technologies: Enhancing Battery Performance and Safety – A comparison of lithium battery coating processes and their applications
In lithium battery manufacturing, the coating process is a critical step affecting cell energy density, cycle life, and safety performance. Different lithium battery coating process technology paths correspond to varied performance outcomes and cost structures. Lankwitzer Coatings (Shanghai) Co., Ltd., as a specialized material supplier in this field, provides customized coating solutions for mainstream processes, helping customers balance process selection and technological advancements.
The industry’s primary lithium battery electrode coating processes include blade coating, slot-die extrusion coating, and spray coating. Blade coating, a traditional method, offers lower equipment costs but is sensitive to slurry rheology and solid content, often leading to inconsistent thickness or edge effects. Slot-die extrusion coating achieves higher precision and uniformity, making it better suited for high-solid-content, high-viscosity electrode slurries. However, it demands more stringent design and maintenance standards for the coating head. Lankwitzer has developed compatible slurry dispersion technologies and binder systems tailored to different process characteristics, ensuring optimal wettability and adhesion across various coating equipment.
In separator coating processes, wet coating and dry coating represent two major approaches. Wet processes enable thinner, more uniform functional coatings, enhancing the thermal stability and electrolyte affinity of separators. Dry processes are more suitable for producing high-temperature-resistant inorganic ceramic coatings. A key focus of Lankwitzer’s R&D is providing coating formulas compatible with both methods, particularly its high-solid-content, low-solvent water-based coating system. This system meets the uniform film formation requirements of wet processes while allowing adjustments to accommodate high-speed dry coating.
Recently, the industry has taken note of the company’s pilot breakthrough in “integrated solid-state electrolyte interface coating process” technology. This innovation aims to form the cathode coating and solid electrolyte layer in a single step through continuous coating, simplifying the traditional multi-stage manufacturing process for solid-state batteries. This approach has the potential to improve interfacial contact and reduce production costs, reflecting the growing trend of combining process integration with material innovation.
Beyond electrodes and separators, current collector coating processes also significantly influence battery impedance and fast-charging performance. Lankwitzer offers two types of coating solutions for aluminum and copper foil current collectors: conductive and corrosion-resistant. Among these, its carbon nanotube-modified conductive coating achieves sub-micron uniform coverage via micro-gravure coating, enhancing conductivity while minimally increasing volume—making it ideal for high-energy-density battery designs.
Looking ahead, as battery technology evolves toward high-nickel cathodes, silicon-carbon anodes, and solid electrolytes, emerging coating and deposition processes such as multi-layer co-extrusion coating and digital printing are gaining traction. Through its coating testing platform at the Shanghai R&D center, Lankwitzer provides integrated support—from material adaptation and process parameter optimization to sample trial production—helping battery manufacturers transition smoothly to next-generation process systems.
Process selection extends beyond equipment and parameters; it requires deep integration of material systems and manufacturing technologies. With its diversified coating product lines and comprehensive process support capabilities, Lankwitzer is empowering lithium battery manufacturers to identify optimal technological pathways that balance performance, safety, and cost.
