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Synthesis and Electrochemical Performance of Ti 4+ Doped LiV 3 O 8
Author(s) -
SUN Junli,
JIAO Lifang,
LIU Li,
WEI Xin,
YANG Lin,
LIU Sichen,
YUAN Huatang,
WANG Yongmei
Publication year - 2009
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.200990145
Subject(s) - chemistry , scanning electron microscope , electrochemistry , calcination , cyclic voltammetry , analytical chemistry (journal) , cathode , doping , diffraction , particle size , sol gel , current density , electrode , nanotechnology , materials science , composite material , chromatography , organic chemistry , optics , catalysis , physics , optoelectronics , quantum mechanics
Layered LiTi y V 3−0.8 y O 8 cathode materials with y =0, 0.04, 0.06, 0.08 were prepared by a sol‐gel process following a calcination at 350°C in air for 16 h, and show differences in morphological properties (shape, particle size and specific surface area) and electrochemical properties (first charge profile, reversible capacity and rate capability). The LiTi y V 3−0.8 y O 8 powders were characterized by means of X‐ray diffraction (XRD), charge/discharge cycling, cyclic voltammetry (CV), and scanning electron microscopy (SEM). LiTi y V 3−0.8 y O 8 was crystallized to a well layered structure. Its initial specific discharge capacity was higher than that of pristine material. When y =0.04, the sample showed the highest initial discharge capacity of 348.9 mAh·g −1 at a current density of 60 mA·g −1 in the voltage range 1.8–4.0 V, and also higher discharge capacity and better cycle ability.