Investigation on Preparation and Electrical Properties of Graphite/VO_2.5-xComposite Powders AITranslate

1Muhammad Rashad,Muhammad Asif,Iftikhar Ahmed,Zhen He,Li Yin,Zhou Xiao Wei,Yuxin Wang.Quest for carbon and vanadium oxide based rechargeable magnesium-ion batteries[J].镁合金学报（英文）,2020,8(2):364-373. 被引量：3

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Chinese Library Classification Number:TQ135.11[化学工程—无机化工]

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The graphite/VO_2.5-xcomposite powders were successfully prepared by carbothermic reduction at atmospheric pressure.The influence of reduction temperature,reduction time and graphite/V2O5 mass ratio on the phase composition of the reduction product was studied by XRD,and the resistivity of gra-phite/VO_2.5-xcomposite powders was measured.The results show that reduction temperature is a key factor affecting phase composition of the product,while reduction time and graphite/V₂O₅mass ratio have little influence.Under the conditions of reduction time of 60 min and graphite/V2O5 mass ratio of 22∶100,the vanadium-containing phase transition sequence of the reduction product is V₂O₅→V₆O₁₃→VO₂→V₅O₉→V₂O₃with reduction temperature increasing from 450℃to 950℃.The graphite content and vanadium-containing phase composition in the reduction product are the key factors affecting the resistivity of gra-phite/VO_2.5-xcomposite powders,and the appearance of VO₂and V₂O₃is conducive to resistivity reduction of the composite powders.The product reduced at 650℃for 60 min with 40∶100 graphite/V2O5 mass ratio has the minimum resistivity of 0.08Ω·cm.