| 层状正极材料Li[Co_(1/3)Ni_(1/3)Mn_(1/3)]O_2的合成及电化学性能表征 |
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| 引用本文： | 任齐都,马培华,邓小川,李法强.层状正极材料Li[Co_(1/3)Ni_(1/3)Mn_(1/3)]O_2的合成及电化学性能表征[J].盐湖研究,2010,18(2). |
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| 作者姓名： | 任齐都 马培华 邓小川 李法强 |
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| 作者单位： | 1. 中国科学院青海盐湖研究所,青海,西宁,810008;中国科学院研究生院,北京,100039
2. 中国科学院青海盐湖研究所,青海,西宁,810008 |
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| 摘 要： | 以Co(NO3)2.6H2O、Ni(CH3COO)2.4H2O和Mn(CH3COO)2.4H2O为原料,在氩气保护下用共沉淀法制备了分散均匀的前驱体Co1/3Ni1/3Mn1/3]C2O4.xH2O,用TG/DSC对前驱体的热分解做了表征。前驱体与碳酸锂在乙醇-水的混合体系中均匀分散,50℃下真空干燥后于500℃下预烧,将得到的混合物压片,然后在空气中于700~1 000℃下煅烧12~24 h得到三元正极材料。将得到的样品进行XRD、电池充放电循环、循环伏安等表征和测试。结果表明,700~1 000℃合成的样品有好的晶型(六方晶系,α-NaFeO2),特别是900℃下合成的正极材料有较好的晶型、高的首次充放电容量,并具有良好的电化学性能。
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| 关 键 词： | 锂电池 正极材料 TG/DSC XRD 循环伏安法 |
Research on Preparing Kinetics and Electrochemical Characterization of Layered Li[Co1/3Ni1/3Mn1/3]O2 Cathode Material |
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| REN Qi-du,MA Pei-hu,DENG Xiao-chuan,LI Fa-qiang.Research on Preparing Kinetics and Electrochemical Characterization of Layered Li[Co1/3Ni1/3Mn1/3]O2 Cathode Material[J].Journal of Salt Lake Research,2010,18(2). |
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| Authors: | REN Qi-du MA Pei-hu DENG Xiao-chuan LI Fa-qiang |
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| Institution: | 1(1.Qinghai Institute of Salt Lakes; Chinese Academy of Sciences; Xining; 810008; China; 2.Graduate University of Chinese Academy of Sciences; Beijing; 100039; China); |
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| Abstract: | Co(NO3)2·6H2O,Ni(CH3COO)2·4H2O and Mn(CH3COO)2·H2O were selected as the starting materials to synthesize the homogeneous transition-metal oxalate Co1/3Ni1/3Mn1/3]C2O4·xH2O by co-precipitation method under the propection of argon atmosphere.TG/DSC analysis was used to confirm precursor thermal decomposition process.The mixture of precursor and lithium carbonate mixed in ethanol/water system was dried at 50 ℃ in vacuum dryer,and then presintered at 500 ℃ for 6h.After cooled to ambient,the mixture was pressed... |
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| Keywords: | TG/DSC XRD |
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