Facile fabrication of reticular polypyrrole–silicon core–shell nanofibers for high performance lithium storage†
Abstract
Silicon is the most promising anode material to replace graphite in lithium ion batteries due to its high theoretical capacity of 4200 mAh g−1. However, the enormous volume expansion of bulk Si during the lithiation process results in severe electrode degradation and capacity decay. Extensive research effort has been devoted to fabricating nanostructured Si-based materials to improve the capacity cycling stability. Herein, a facile two-step approach is developed for the fabrication of novel three-dimensional (3D) nanoarchitectures composed of