【摘 要】
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The pristine CeVO4 and CeVO4/CNT hybrid composite nanostructured samples were facilely synthesized using a simple silicone oil-bath method.From the X-ray diffra
【机 构】
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Department of Electronics and Information Convergence Engineering, Institute for Wearable Convergenc
论文部分内容阅读
The pristine CeVO4 and CeVO4/CNT hybrid composite nanostructured samples were facilely synthesized using a simple silicone oil-bath method.From the X-ray diffraction results,the formation of tetragonal CeVO4 with an additional minor phase of V2O5 was identified.When investigated as an anode material for lithium (Li)-ion batteries,the CeVO4/CNT hybrid composite nanostructure (HCNS) electrode demonstrated improved Li storage performance over the pristine CeVO4.The Li insertion/de-insertion electrochemical reaction with the CeVO4 was analyzed on the basis of cyclic voltammetry study.The cyclic voltammetry analysis revealed that the three-step reduction of V5+ to V3+,V3+ to V2+,and V2+ to V+ processes is involved and among them,only V5+ to V3+ is reversible during the Li-ion insertion into CeVO4.The CeVO4/CNT HCNS electrode exhibited a discharge capacity as high as 443 mA h g-1 (capacity retention of 96.3％) over 200 cycles at 100 mA g-1,whereas the pristine CeVO4 is limited to 138 mA h g-1 (capacity retention of 48％).Even at a high current density of 500 mA g-1,the CeVO4/CNT HCNS electrode delivered an excellent reversible capacity of 586.82 mA h g-1 after 1200 cycles,
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