Nanoscale Design for High Energy Batteries

Yi Cui
Department of Materials Science and Engineering
Stanford University

Si and S have an ultrahigh capacity of lithium storage and suitable voltage as anodes and cathodes, respectively, for future high energy batteries. The combination of Si-S can generate  four times  specific energy of the  existing C-LiCoO2 system. However, Si and S has many materials challenges to be overcome. The development of nanotechnology in the past two decades has generated great capability of controlling materials at the nanometer scale and has enabled exciting opportunities to design materials to overcome these challenges.  In this talk, I will show how to develop fundamental principles through single nanostructure measurement and how to design rationally nanostructured materials to address all those materials challenges. I will show the excitingly high performance on both Si and S electrodes.