High Energy Anode Materials for Lithium Ion Batteries

Lithium ion batteries (LIBs) have been used as a primary energy storage for portable electronics. In LIBs, Li ions shuttle from cathode to anode and vice versa. The capacity of LIB is decided by the capacity of Li ion storage by anode and cathode materials, hence anode and cathode materials play dominant roles in the performance of LIBs. While there has been significant improvement in the capacity of cathode materials, graphite has been used as a prominent anode material for LIBs since their commercialization due to its cyclic performance, natural abundance, low cost, and ecofriendly nature. However, there are several anode materials that have shown higher Li ion storing capacity than graphite, such as Si, Sn, and metal oxides. However, most of these high capacity materials suffer from volume expansion (up to 400%) during lithiation which result in pulverization of electrodes. It poses a serious cyclability issue since their capacity drops during cycling due to pulverization, and sometimes can result in the loss of electrical contacts. A variety of newly designed configurations have been proposed to improve cyclic performance but suffer from high cost of synthesis and scalability for mass production. However, most of the major battery producers, including Samsung, LG, and Panasonic are interested in gradual improvements to their existing products rather than radical shift.

MFNS Tech has worked in the direction of making this gradual change. We have developed a MFNS Tech Composite that is 250% cheaper, 400% smaller, and 300% lighter than current state of the art anode materials in Li-ion batteries. The MFNS Tech Composite is not only higher in capacity than the current battery grade graphite but also is low cost, ecofriendly, and in ready-to-deploy form. The MFNS Tech Composite can be synthesized in a continuous manner, hence is mass producible. The MFNS Tech Composite's capacity can reach 300% of battery grade graphite.