Ligand Stripped Vanadium Trifluoride Nanocrystals with Churros Structure as Novel Anode Material in Lithium Ion Batteries

Herein, the churros-like nanocrystal of vanadium trifluoride (VF3) is prepared using a high temperature nanoparticle synthesis method and applied into the anode material in lithium ion batteries. A novel shape nanostructure is firstly observed from our synthesis and the surface ligand is stripped in order to obtain clean surface, which can reduce the irreversible decomposition in anode application. When applied into anode as conversion-based charge storage, a high discharge capacity of 607 mAh g-1 at 0.1 C rate, which is the highest value in the reported VF3 anode materials. Also, a gradual increase of discharge capacity into 633 mAh g-1 at the 500th cycle under 0.2 C rate is observed, which is attributed to the typical conversion reaction mechanism of our materials. From galvanostatic charge-discharge patterns and electrochemical impedance spectroscopy, it is observed that very limited increase in overall resistance is observed even after 500 cycles. These highly advanced anode performances of our churros like VF3 nanocrystals is ascribed to a high accessible lithium ion and well-dispersed nanocrystal morphology in maintaining nanocrystal shape after long-term charge-discharge. © 2025, Korean Electrochemical Society. All rights reserved.​

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