According to foreign media reports, researchers at the National Institute for Materials Science (NIMS) have claimed that nanoporous, amorphous silicon film anodes exhibit excellent cycle stability and lithium ions. Extremely high storage capacity: 2962 mAh/g (2.19 mAh/cm2) after 100 charge and discharge cycles.
The NIMS team combines a nanoporous amorphous silicon film with an inorganic solid electrolyte to solve the problem of capacity fading. The nanoporous structure can accommodate the volume change of silicon, thereby limiting the mechanical fracture of the anode (mechanical fracture). ) and pulverization.
Unlike liquid electrolytes, solid electrolytes do not decompose because of their wide electrochemical stability window. It has been experimentally proven that silicon has a high capacity, and even if it is charged and discharged 100 times, the attenuation of capacity is small. .
The research was funded by the New Energy and Industrial Technology Development Organization (NEDO) and Toyota Motor Corporation.
