According to foreign media reports, the researchers of the National Institute for Materials Science (NIMS) in Japan claimed that the nanoporous amorphous silicon film anode exhibits excellent cycling stability and its lithium ion High storage capacity: 2962 mAh/g (2.19 mAh/cm2) after 100 times of charge and discharge.
The NIMS team combines nanoporous a-Si thin films with inorganic solid electrolytes to solve the capacity fading problem. The nanoporous structure can adapt to the volume change of silicon, thereby limiting the mechanical failure of the anode (mechanical fracture) ) and atomization (pulverization).
Unlike liquid electrolytes, solid electrolytes do not decompose due to the wide range of electrochemical stability windows. It has been experimentally demonstrated that silicon materials have high capacity, and even when they are charged and discharged 100 times, the attenuation of the capacity is small. .
The study was funded by the New Energy and Industrial Technology Development Organization (NEDO) and Toyota Motor Corporation.