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Hierarchical porous framework of Si-based electrodes for minimal volumetric expansion
Daniela Molina Piper1, Jae Ha Woo, Seoung-Bum Son
1Department of Mechanical Engineering, University of Colorado at Boulder, 80309, USA.
Advanced Materials (Deerfield Beach, Fla.)
|March 14, 2014
Abstract:
A tunable hierarchical porous framework is fabricated to house the volumetric changes outputted by Si. The nSi@cPAN/cPAN electrodes only expand by 14.3% at full initial lithiation and remain within 23% expansion from its uncycled state after 20 cycles with remarkable cycling stability and high coulombic efficiencies in excess of 99.5%.
