Advanced Materials (FRG) 2014-06-04

Hierarchical porous framework of Si-based electrodes for minimal volumetric expansion.

Daniela Molina Piper, Jae Ha Woo, Seoung-Bum Son, Seul Cham Kim, Kyu Hwan Oh, Se-Hee Lee

Index: Adv. Mater. 26(21) , 3520-5, (2014)

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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%. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.