EurekAlert December 23, 2019
In conventional liquid electrolytes, the use of polymeric binders is necessary to hold the active material particles in the electrode together and maintain their adhesion to the surface of metal current collectors. The repeated huge volume change of Si causes the particle isolation and thus leads to losing the active material, which results in a continuous capacity loss. Researchers in Japan have shown that in solid electrolytes, an Si anode composed only of commercial Si nanoparticles prepared by spray deposition exhibits excellent electrode performance, which has previously been observed only for film electrodes prepared by evaporation processes. This new result therefore suggests that a low-cost and large-scale production of high-capacity anodes for use in all-solid-state Li batteries is possible. Si has a theoretical capacity of ~4,200 mAh/g, which is approximately 11 times higher than that of the graphite commonly used as the anode-active material in commercial Li-ion batteries…read more. TECHNICAL ARTICLE
Graphical abstract. Credit: ACS Appl. Energy Mater. 2019, 2, 10, 7005-7008, September 24, 2019Â