Journal of South China University of Technology(Natural Science) >

2010 , Vol. 38 >Issue 4: 30 - 34,44

DOI: https://doi.org/10.3969/j.issn.1000-565X.2010.04.006

Chemistry & Chemical Engineering

Thermodynamic Analysis of Synthesis of Ni 1/3 Co 1/3 Mn 1/3（OH）2 via Coprecipitation

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  • School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
肖新颜（1964-），男，博士，教授，主要从事精细化学工程、环境化工等研究．

Received date: 2009-06-22

  Revised date: 2009-09-07

  Online published: 2010-04-25

Supported by

广东省科技攻关项目（2008B010800031）

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Abstract

The thermodynamic analysis of Me 2＋-NH3-OH--H2O（Me=Ni,Co,Mn） coprecipitation system was carried out,and the precursor Ni 1/3 Co 1/3 Mn 1/3（OH）2, for cathode material LiNi 1/3 Co 1/3 Mn 1/3 O2 was synthesized via a coprecipitation method,with NaOH as the precipitant and NH3·H2O as the complexing agent.The thermodynamic analysis shows that the optimal conditions are pH value of 11 and ammonia concentration 0.1～0.5mol/L,and the loss of Ni 2＋,Co 2＋ and Mn 2＋ reaches the minimum,that is,1×10 -3,1×10 -3 and 1×10 -6 mol/L,respectively.The molar ratio of Ni/Co/Mn in the synthesized precursor is 0.324∶0.349∶0.327,which approximates the desired 1∶1∶1,and the tap density of the synthesized precursor is up to 1.32g/cm3 when pH value is 11 and an ammonia concentration is 0.24mol/L.

Key words： lithium-ion battery; cathode material; precursor; coprecipitation method; thermodynamic analysis

Cite this article

Xiao Xin-yan Ye Yong-qing . Thermodynamic Analysis of Synthesis of Ni 1/3 Co 1/3 Mn 1/3（OH）2 via Coprecipitation[J]. Journal of South China University of Technology(Natural Science), 2010 , 38(4) : 30 -34,44 . DOI: 10.3969/j.issn.1000-565X.2010.04.006

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