Engineering Empty Space between Si Nanoparticles for Lithium-Ion Battery Anodes Wu, Hui ; Zheng, Guangyuan ; Liu, Nian ; Carney, Thomas J. ; Yang, Yuan ; Cui, Yi Abstract Publication: Nano Letters Pub Date: February 2012 DOI: 10.1021/nl203967r Bibcode: 2012NanoL..12..904W