کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6471493 | 1424127 | 2017 | 9 صفحه PDF | دانلود رایگان |
- Different polycrystalline V2O5/Na0.33V2O5 nanostructures were synthesized via simple co-precipitation technique.
- The various molar ratios of NaOH precipitator determine the morphology, structural and electrochemical properties of V/Na.
- The equimolar ratio of reactant and precipitator shows the formation of â¼96% of pure crystalline phase of V2O5.
- Li+ ions intercalation and deintercalation process enhanced the specific capacitance.
This work essentially offers a new kind of V2O5/Na0.33V2O5 as electrochemical active material for the development of Li+ ion redox supercapacitors. Here, polycrystalline mixed phase of V2O5/Na0.33V2O5 (V/Na) nanostructures are synthesized via simple co-precipitation technique. The various molar ratio of precipitator (NaOH) in the synthesis process displays different nanostructures of V/Na. The structural and morphological properties of V/Na samples are studied using physico-chemical analysis methods. The electrochemical properties of V/Na nanostructured samples are performed using cyclic voltammetry, galvanostatic charge/discharge test and electrochemical impedance spectroscopy techniques in 1Â M LiClO4 aqueous electrolyte. The sample V/Na synthesized using equimolar ratio of vanadium salt and precipitator displayed nanopellet morphology, which exhibited the highest capacitance value of 334Â Fgâ1 at 1Â Agâ1 discharge current density. Moreover, these polycrystalline V/Na nanostructured electrodes show excellent electrochemical properties with comparable stability after 1000 charge/discharge cycles.
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Journal: Electrochimica Acta - Volume 230, 10 March 2017, Pages 492-500