Changshu Yongdeli Spunlaced Non-woven Fabric Co., Ltd. has officially launched its latest innovation: the spunlace preoxidized felt electrode material. This advanced electrode solution is designed to meet the growing demand for high-performance, cost-effective energy storage in all-vanadium redox flow batteries. By integrating cutting-edge fiber processing with a proprietary spunlace technique, this product delivers a dual breakthrough in both performance and cost.
Unmatched Energy Efficiency for High-Power Applications
The spunlace preoxidized felt electrode material demonstrates exceptional energy efficiency under high current conditions. At 350 mA/cm², the material achieves up to 96% energy efficiency, with voltage efficiency reaching 87% and overall energy efficiency exceeding 85%. These figures represent a significant improvement over conventional needle-punched electrodes, translating into reduced energy loss and increased operational savings for energy storage systems.
The enhanced electrocatalytic activity is attributed to the rich oxygen-containing functional groups (oxygen atom content between 5–30%) and optimized pore structure (specific surface area ranging from 5 to 150 m²/g). These features reduce electrochemical polarization and improve the REDOX reaction kinetics of vanadium ions, making the material ideal for high-power energy storage scenarios.
Significant Cost Reduction Without Compromising Performance
One of the most compelling advantages of this new electrode material is its ability to reduce system costs by approximately 30%. This is achieved through a specialized spunlace process that overcomes the brittleness of preoxidized fibers, resulting in uniform fiber dispersion and high-strength felt formation. Compared to traditional needle-punched materials, the spunlace preoxidized felt electrode material is 20–30% lighter and thinner, yet delivers superior mechanical and electrochemical performance.
This reduction in material volume directly contributes to smaller reactor sizes and lower overall system costs, offering a faster return on investment for energy storage developers.
Enhanced Conductivity and Stable Power Output
The spunlace process creates a stable three-dimensional conductive network that minimizes fiber damage and enhances graphitization. The smooth and clean surface of the felt reduces dust and powder content, significantly lowering ohmic internal resistance and improving conductivity. These improvements result in more stable and powerful battery output during high-power charge and discharge cycles.
Additionally, the dense micropores and mesopores formed during activation provide an ideal platform for PECVD applications and support the elimination of ion-exchange membranes, further enhancing system efficiency.
Proprietary Spunlace Technology: A Technical Moat
Changshu Yongdeli’s proprietary spiral low-pressure spunlace process is at the heart of this innovation. By combining imported preoxidized fibers of varying fineness and applying advanced non-destructive opening, carding, and web-laying techniques, the company ensures uniform fiber dispersion and optimal structural integrity.
The variable density design concept—featuring coarse fibers as the framework and fine fibers as dense channels—results in high porosity (up to 99%), excellent permeability, and superior mechanical strength. These properties enable the electrode to resist electrolyte erosion and maintain long cycle life.
The company also employs a self-developed high-efficiency opening machine, pneumatic cotton box for uniform feeding, and a 3.75-meter high-speed carding machine. These technologies enhance the uniformity and stability of the felt, reducing weak points and ensuring consistent performance.
Importantly, Changshu Yongdeli has developed an anti-static combing process that avoids the use of chemical antistatic agents. This eliminates the risk of chemical residue during subsequent carbonization and graphitization, ensuring a cleaner and more sustainable production process.
A New Standard for Vanadium Battery Electrodes
The spunlace preoxidized felt electrode material sets a new benchmark for vanadium battery electrodes. It supports higher current densities, offers better porosity and uniformity, and delivers lower thermal conductivity and internal resistance. These advantages make it the preferred choice for next-generation energy storage systems.
With scalable production capabilities and a commitment to innovation, Changshu Yongdeli is ready to support global energy storage manufacturers seeking reliable, high-performance electrode solutions. The spunlace preoxidized felt electrode material is not just a product upgrade—it’s a strategic leap toward more efficient, cost-effective, and sustainable energy storage.
Post time: Jul-22-2025