Three-dimensional porous C/CoS nanocomposites for a long-life and high-rate potassium storage

作者：Mu, Meiqi; He, Haishan; Gan, Yunfei; Yu, Jing; Mou, Jirong; Yuan, Jujun^*; Li, Fangkun; Wang, Xingquan; Li, Xiaokang^*; Zhang, Xianke; Liu, Jun

来源：Materials Research Bulletin, 2023, 165: 112337.

DOI：10.1016/j.materresbull.2023.112337

• Potassium ion battery
• CoS
• 3D porous carbon
• Anode
• High stability

The three-dimensional (3D) porous C/CoS nanocomposites were successfully synthesized using a spontaneous template method followed by a subsequent vulcanization process. As potassium ion battery anode, the 3D porous C/CoS nanocomposites exhibited a reversible capacity of 165 mAh g-1 at 5 A g-1 after 2000 cycles and superior rate performance. The excellent electrochemical performance of 3D porous C/CoS nanocomposites is ascribed to its distinctive architecture, which can alleviate the volume variation of CoS in the cyclic processes, improve electronic/ionic conductivity, and provide more chances of contact between electrode material and electrolyte. It is promising that our fabricating method can be expanded for synthesizing other 3D porous C/metal sulfides composites as high-performance PIB anodes.

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