کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296522 | 973784 | 2014 | 5 صفحه PDF | دانلود رایگان |
• By the introduction of V5 + ion, Ni–V multiple metal oxide showed higher anodic current in lower voltage than nickel oxide.
• Two step reaction, surface film formation above 1.0 V and formation of lithium oxide and nano size metal particles below 1.0 V, was indicated.
• From the result of surface observation by SEM, two step reaction mechanism was conformed.
Electrochemical properties of nano-size Ni–V, Ni–Fe and Mg–Fe multiple metal oxides, prepared from layered double hydroxides as precursors, for the anode electrode of lithium battery has been investigated using cyclic voltammetry, AC-impedance and ex-situ by SEM observation. In the CV curves of N–V multiple metal oxide, it became clear that the reaction voltage of vanadium–nickel oxide system shifted to lower voltage than non-dope NiO. AC-impedance and the morphology observation results that the electrochemical reaction of multiple metal oxides with lithium ion proceeds via the two-step reaction: the surface film formation above 1.0 V and the subsequent conversion reaction below 1.0 V.
Journal: Solid State Ionics - Volume 268, Part B, 15 December 2014, Pages 268–272