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Low Temperature Synthesis and Characterization of Li 1.2‐y Na y V 3 O 8 (0 ≤ y ≤ 1.2) from V 2 O 5 Gel
Author(s) -
JingGang Xie,
Jle Xiao,
Hui Zhan,
YunHong Zhou
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030210305
Subject(s) - chemistry , lithium (medication) , electrochemistry , cyclic voltammetry , analytical chemistry (journal) , cathode , atmospheric temperature range , characterization (materials science) , nuclear chemistry , electrode , nanotechnology , organic chemistry , medicine , physics , materials science , meteorology , endocrinology
Without overnight heating and stirring, Li 1.2 V 3 O 8 and its analogs Li 1.2‐y Na y V 3 O 8 (0 ≤ y ≤ 1.2) were successfully synthesized by adding mixed solution of LiOH and NaVO 3 to V 2 O 5 gel and dehydrating the prepared gel in 150–350°C. The simplicity awards this synthesis process superiority over other low temperature synthesis routes when mass production is concerned. TG‐DTA, XRD and TEM experiments were carried out for physical characterization. By galvanostatic charge‐discharge and cyclic voltammetry tests, these products showed better electrochemical performance than high temperature products as cathode active materials in secondary lithium batteries. After treatment of Li 1.2 V 3 O 8 at 250°C, it exhibited a capacity of 350 mAh/g when cycled at current rate of about 60 mA/g over the voltage range of 3.8–1.7 V vs. Li + /Li. The influence of partial substitution of Li by Na was also extensively studied.