RETRACTED ARTICLE: Theoretical Limits of Energy Density in Silicon-Carbon Composite Anode Based Lithium Ion Batteries

• DOI: 10.1038/srep27449
• Publication Date: 2016-06-17T08:58:07Z
• Authors: Ranjan Dash; Sreekanth Pannala
• Keywords: Carbon fibers; Power density; Gravimetric analysis

Abstract Silicon (Si) is under consideration as a potential next-generation anode material for the lithium ion battery (LIB). Experimental reports of up to 40% increase in energy density Si based LIBs (Si-LIBs) have been reported literature. However, this achieved when Si-LIB allowed swell (volumetrically expand) more than graphite LIB (graphite-LIB) and beyond practical limits. The volume expansion electrodes should be negligible applications such automotive or mobile devices. We determine theoretical bounds composition Si–carbon composite (SCC) maximize volumetric by constraining external dimensions during charging. porosity SCC adjusted accommodate lithiation. calculated threshold value was then used possible densities with (SCC-LIBs) improvement over graphite-LIBs. level gravimetric SCC-LIBs constrained predicted less 10% ensure has similar power characteristics