A yolk-shelled Co9S8/MoS2-CN nanocomposite derived from a metal-organic framework as a high performance anode for sodium ion batteries

作者：Wang, Yuyu; Kang, Wenpei^*; Cao, Dongwei; Zhang, Minghui; Kang, Zixi; Xiao, Zhenyu; Wang, Rongming^*; Sun, Daofeng

来源：Journal of Materials Chemistry A, 2018, 6(11): 4776-4782.

DOI：10.1039/c8ta00493e

• REDUCED GRAPHENE OXIDE
• LITHIUM-ION
• HIERARCHICAL NANOTUBES
• MOLYBDENUM-DISULFIDE
• STORAGE PERFORMANCE
• HYDROGEN EVOLUTION
• ENERGY-STORAGE
• CARBON
• NANOSTRUCTURES
• NANOPARTICLES

Sodium-ion batteries (SIBs) are considered as a promising energy storage device, and anode materials are proved to essentially affect their electrochemical performance. In this work, a yolk-shell structured Co9S8/MoS2 polyhedron with N-doped carbon composite (Co9S8/MoS2-CN) was designed and synthesized through a step by step process using ZIF-67 as the precursor. And this composite is demonstrated to be an excellent electrode candidate material for SIBs due to the magnificent yolk-shelled structures, in situ CN coating and the synergistic effect of the binary sulfides. The Co9S8/MoS2-CN composite electrode shows highly stable cycling performance and delivers a reversible discharge capacity of 438 mA h g(-1) within 150 cycles at a current density of 1.0 A g(-1), which is much higher than that of Co9S8-CN or MoS2 electrodes. Even at a high current density of 2.0 A g(-1), it can also deliver an impressively stable capacity of 421 mA h g(-1) within 250 cycles.

• 出版日期2018-3-21
• 单位中国石油大学（华东）