S-Doped Carbon-Coated FeS2/C@C Nanorods for Potassium Storage

• 作者: Xin Li Huaping Wang Wenchao Zhang Yuezhan Feng Jianmin Ma
• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Special Issue:Anode Materials for Rechargeable Batteries
• 页码范围: 321-328
• 页数: 8页
• 语种: 英文

摘要

Potassium-ion batteries (PIBs) are promising scalable energy storage system;however,one of the challenges for its potential application is the huge volume variations during cycling due to the insertion/extraction of large size potassium ions.Here,we fabricated the S-doped carbon-coated rod-like FeS2/C@C,which not only effectively alleviate the volume variations upon cycling but also can improve electrical conductivity and maintain the structural integrity.As an anode material for PIBs,the rod-like FeS2/C@C electrodes delivered excellent rate performance (175 mA h g-1 at 0.5 A g-1) and stable cycle performance (262 mA h g-1 after 100 cycles at 0.1 A g-1).The superior excellent performance is associated with the unique structure of FeS2/[e-mail] as-synthesized FeS2/C@C is demonstrated to be a potential anode for PIBs.