Transition metal selenides have become highly promising negative electrode materials for sodium ion batteries due to their high theoretical specific capacity and low cost advantages.However,due to kinetic and thermodynamic limitations,transition metal selenides usually undergo significant volume changes during use,resulting in rapid capacity decay,significant stability decline.In order to solve these problems,carbon cloth-supported NiSe2/MoSe2 heterojunction nanosheet array(NiSe2/MoSe2@CC)were prepared by solvothermal and calcination technology.The morphology and components of the synthesized materials were studied by XRD,SEM and XPS.The results show that NiSe2-MoSe2 heterojunction nanosheets were grown in situ on carbon cloth,which greatly improved the charge transfer capability of the material.When applied to the anode material of sodium-ion batteries,NiSe2/MoSe2@CC shows high specific capacity and good cycling stability.The reversible capacity of the synthesized electrode material can still be maintained at 648.6 mAh·g-1 after 100 cycles at a current density of 0.1 A·g-1.
关键词
NiSe2/MoSe2异质结/碳布/钠离子电池/负极材料
Key words
NiSe2/MoSe2 heterojunction/carbon cloth/Na-ion batteries/anode material
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