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Acta Metall Sin  2005, Vol. 41 Issue (12): 1280-1284     DOI:
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EFFECT OF SYNTHESIZING TEMPERATURE ON THE STRUCTURE AND PROPERTY OF HEXAGONAL Li-Ni-Co-Mn-O SOLID SOLUTION
TANG Aidong; HUANG Kelong
Institute of Functional Material Chemistry; School of Chemistry and Chemical Engineering; Central South University; Changsha 410083
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TANG Aidong; HUANG Kelong. EFFECT OF SYNTHESIZING TEMPERATURE ON THE STRUCTURE AND PROPERTY OF HEXAGONAL Li-Ni-Co-Mn-O SOLID SOLUTION. Acta Metall Sin, 2005, 41(12): 1280-1284 .

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Abstract  The cathode material for lithium batteries Li1.15-xNi1/3Co1/3Mn1/3O2+δ has been synthesized by sol-gel technique. The effects of synthesizing temperature on the structure, micro-morphology and electrochemical properties of these materials were investigated using X-ray diffraction, scanning electron microscopy and charge-discharge cycling tests. The material synthesized at 600 ℃ has a hexagonal layered structure. The intensity of the diffraction peaks and the particle size of the material synthesized at 920-980 ℃ increased with synthesizing temperature. The ratio values of I_003/I_104 and unit cell volume of the material synthesized at 950 ℃ are larger than those of the material synthesized at 920 and 980 ℃. The maximum charge/discharge capacity and the minimum electrode polarization were obtained for the material synthesized at 950 ℃, which has the initial discharge capacity of 180 mA•h/g in the range of 2.5-4.5 V at a specific current of 28 mA/g.
Key words:  Li1.15-xNi1      3Co1/3Mn1/3O2+δ      solid solution      
Received:  04 April 2005     
ZTFLH:  TM912.9  
  O646.54  

URL: 

https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I12/1280

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