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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 2    April 2007

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Synthesis and characterization of layered
Li(Ni1/3Mn1/3Co1/3)O2 cathode materials
by spray-drying method
LIU Zhi-min(刘智敏), HU Guo-rong(胡国荣), PENG Zhong-dong(彭忠东),
DENG Xin-rong(邓新荣), LIU Ye-xiang(刘业翔)

School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China

Abstract:Spherical Li(Ni1/3Mn1/3Co1/3)O2 was prepared via the homogenous precursors produced by solution spray-drying method. The precursors were sintered at different temperatures between 600 and 1 000 ℃ for 10 h. The impacts of different sintering temperatures on the structure and electrochemical performances of Li(Ni1/3Mn1/3Co1/3)O2 were compared by means of X-ray diffractometry(XRD), scanning electron microscopy(SEM), and charge/discharge test as cathode materials for lithium ion batteries. The experimental results show that the spherical morphology of the spray-dried powers maintains during the subsequent heat treatment and the specific capacity increases with rising sintering temperature. When the sintering temperature rises up to 900 ℃, Li(Ni1/3Mn1/3Co1/3)O2 attains a reversible capacity of 153 mA∙h/g between 3.00 and 4.35 V at 0.2C rate with excellent cyclability.

 

Key words: spherical Li(Ni1/3Mn1/3Co1/3)O2 powder; synthesis; characterization; spray-drying method; lithium ion battery

ISSN 1672-7029
CN 43-1423/U

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