Synthesis and Electrochemical Properties of 0.5Li&lt;sub&gt;2&lt;/sub&gt;MnO&lt;sub&gt;3&lt;/sub&gt;•0.5LiMn&lt;sub&gt;0.5&lt;/sub&gt;Ni&lt;sub&gt;0.5&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;

Sheng Zhong; Wei Hu; Qian Zhang

doi:10.4028/www.scientific.net/amr.105-106.664

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JOURNAL ARTICLE

Synthesis and Electrochemical Properties of 0.5Li2MnO3•0.5LiMn0.5Ni0.5O2

Sheng Zhong Wei Hu Qian Zhang

Year: 2010 Journal: Advanced materials research Vol: 105-106 Pages: 664-667 Publisher: Trans Tech Publications

DOI: 10.4028/www.scientific.net/amr.105-106.664

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Abstract

The precursor of Mn0.75Ni0.25CO3 is prepared by carbonate co-precipitation method. And the cathode material 0.5Li2MnO3•0.5LiMn0.5Ni0.5O2 is synthesized with two stages calcining temperatures T1 and T2. T1 represents 400°C, 500°C, 600°C and T2 is selected at 750°C, 850°C, 950°C respectively. XRD Patterns shows that the cathode material has the integrated structures of Li2MnO3 and LiMO2, and it has better crystallization during the rise of calcined temperature at 950°C. The electrochemical performances tests indicates that the initial discharge specific capacity are greater than 220mAh/g at the current density 0.2 mA/cm2 in 2.5-4.6V at room temperature. When cathode material is calcined at 750°C, its discharge specific capacity even reach to 248mAh/g, but the cathode material has more perfect general electrochemical properties during calcined temperature at 950°C.

Keywords:

Calcination Electrochemistry Materials science Cathode Crystallization Precipitation Chemical engineering Current density Electrode Catalysis Physical chemistry Chemistry Organic chemistry Meteorology

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Synthesis and Electrochemical Properties of 0.5Li<sub>2</sub>MnO<sub>3</sub>•0.5LiMn<sub>0.5</sub>Ni<sub>0.5</sub>O<sub>2</sub>

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