Amorphous CoMoS₄ Nanoparticles Attached to CNTs@PDA as High-Performance Anode Materials for Lithium-Ion Batteries
2022
Cai, JiangTao | Ding, Yunyun | Zhu, Youyu | Hou, Liuhua | Zhao, Shiyong | Zhang, Yating
It is necessary to design an anode material for lithium-ion batteries (LIBs) with good lithium storage capacity. In the present work, the CNTs@PDA/CoMoS₄ composite materials were prepared through self-polymerization of dopamine (PDA) and coating on carbon nanotubes and then deposition of CoMoS₄ by a hydrothermal method. Benefited from the formation of the coordination bond between the hydroxyl groups of PDA and the metal ions of CoMoS₄, the combination between the CNTs@PDA matrix and CoMoS₄ nanoparticles is effectively enhanced. As a result, CoMoS₄ nanoparticles grow uniformly on the surface of CNTs@PDA, which reduces the diffusion length of Li⁺ and improves the electronic transmission efficiency. The CNTs@PDA/CoMoS₄ as an anode material exhibits outstanding electrochemical properties in terms of a high capacity of 1025.2 mA h·g–¹ after 100 cycles at 0.1 A·g–¹. Meanwhile, its capacity is 490.3 mA h·g–¹ after 200 cycles at 1 A·g–¹. The desirable electrochemical properties combined with the stable structure and the facile synthesis route make CNTs@PDA/CoMoS₄ composites a potential candidate for high-performance LIBs.
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