Preparation of a Sulfur-Doped Graphene-Wrapped FeS 2 Microsphere Composite Material for Lithium-Ion Batteries

作者：Yating Zhang, Yating Zhang, Zhanrui Zhang, Yongling Zhang, Yongling Zhang, Peng Wang, Pengfei Han, Keke Li, Wei Liu · 发表于：Energy & Fuels · 年份：2021 · DOI：10.1021/acs.energyfuels.1c02999 · 被引用次数：21 · 研究领域：Advancements in Battery Materials、Extraction and Separation Processes、Metal Extraction and Bioleaching

Pyrite (FeS 2 ) is considered a promising anode material for lithium-ion batteries (LIBs) relying on its high theoretical specific capacity and low cost. However, the application of FeS 2 as anodes has been greatly limited due to its low electrical conductivity and huge volume expansion during cycling. In this work, a facile approach was developed to prepare an FeS 2 and sulfur-doped graphene (SG) composite (FeS 2 /SG). The product exhibits good electrochemical performance in terms of a high capacity of 1033.4 mAh·g –1 at 0.1 A·g –1 after 60 cycles and good rate performance because of its conductive network and porous structure. Therefore, the FeS 2 /SG composite can be considered a candidate material for LIB anodes considering such desirable electrochemical performances and the economic synthesis route.