Lithium-ion battery cathode material Li1+xV3O8 is synthesized by a citric acid/tartaric acid assisted sol -gel method and sintered at 350 degrees C, 450 degrees C and 550 degrees C for 3 h for the formation of Li1+xV3O8 phase. The synthesized samples were fully characterized by FTIR, TG/DTA, XRD, SEM, EIS and charge-discharge tests. Li(1+)xV(3)O(8) material synthesized by tartaric acid assisted route and sintered at 450 degrees C for 3 h shows best electro-chemical performance. It shows a high initial capacity of 249 mAh g(-1) and still reserves a discharge capacity of 260 mAh g(-1) after 50 cycles. Moreover, in the case of tartaric assisted products, no capacity decadence is observed in 50 cycles. XRD together with TG/DTA measurements reveal that compared with citric acid assisted products, the adoption of tartaric acid as chelating agent effectively lowers the crystallization temperature of amorphous Li1+xV3O8. Therefore, precursors obtained by tartaric acid route calcinated at 450 degrees C for 3 h exhibit lower crystallinity and smaller grain size, which contributes to the better electrochemical performance of the cathode electrodes. From EIS measurements, the bulk resistance is reduced, which favors the intercalation and de-intercalation of lithium ions while cycling. (C) 2012 Elsevier B.V. All rights reserved.