蒋世芳,孟焕菊,张宇栋,刘双,陶占良,陈军.锂离子电池正极材料LiNi0.8Co0.15Al0.05O2的制备及电化学性能[J].稀有金属材料与工程,2019,48(2):678~682.[Jiang Shifang,Meng Huanju,Zhang Yudong,Liu Shuang,Tao Zhanliang,Chen Jun.The preparation and electrochemical properties of LiNi0.8Co0.15Al0.05O2 lithium ion batteries cathode material[J].Rare Metal Materials and Engineering,2019,48(2):678~682.]
锂离子电池正极材料LiNi0.8Co0.15Al0.05O2的制备及电化学性能
投稿时间:2017-06-05  修订日期:2017-08-07
中文关键词:  三元共沉淀法  高温处理  Ni0.8Co0.15Al0.05(OH)2  LiNi0.8Co0.15Al0.05O2
基金项目:国家重点研发计划(No.2016YFB0901502)、国家自然科学基金(No.51271094)及中央高校基本科研业务费资助
中文摘要:
      本文首先以AlO2-为铝源,采用三元共沉淀法制备前驱体Ni0.8Co0.15Al0.05(OH)2。对前驱体进行500℃高温处理,随后与过量的锂盐混合均匀,在氧气气氛下700℃煅烧12h制得LiNi0.8Co0.15Al0.05O2(NCA)材料。采用X射线衍射仪(XRD)测试可知所得的NCA材料呈典型的α-NaFeO2层状结构,属于R-3m空间点群。扫描电子显微镜(SEM)测试显示NCA呈5~6 μm的球状颗粒。材料在电流倍率为0.1C下首次放电容量为167.1 mAh/g,循环200圈以后容量保持率为96.2%。倍率测试表明,0.1C、10C下NCA的容量分别为184.0 mAh/g、112.7 mAh/g,到恢复到0.1C时,容量仍可达179.7 mAh/g,具有比较好的倍率性能。
The preparation and electrochemical properties of LiNi0.8Co0.15Al0.05O2 lithium ion batteries cathode material
英文关键词:Co-precipitation method  high-temperature process  Ni0.8Co0.15Al0.05(OH)2  LiNi0.8Co0.15Al0.05O2
英文摘要:
      In this article, the Ni0.8Co0.15Al0.05(OH)2 precursor was prepared by co-precipitation method, which AlO2- as Al source used. The precursor was processed at 500 oC, followed by mixing with excess LiOH?H2O and calcined at 700 oC for 12h under O2 atmosphere. Finally, LiNi0.8Co0.15Al0.05O2(NCA) materials have been synthesized. X-ray diffraction (XRD) showed that the NCA material is a typical α-NaFeO2 layered structure and belongs to the R-3m space group. According to scanning electron microscopy (SEM), they were uniform spheroidal particles with 5~6 μm diameters. The results of electrochemical tests showed that the first discharge capacity of NCA is 167.1 mAh/g at 0.1C rate, and the capacity retention rate is 96.2% after 200 cycles. Rate capacity test indicated that its capacity at 0.1C and 10C is 184.0 mAh/g, 112.7 mAh/g, respectively. When restored to 0.1C, the capacity can reach 179.7 mAh/g, and has a good rate performance.
作者单位E-mail
蒋世芳 南开大学化学学院 1290680691@qq.com 
孟焕菊 南开大学化学学院  
张宇栋 南开大学化学学院  
刘双 南开大学化学学院  
陶占良 南开大学化学学院 taozhl@nankai.edu.cn 
陈军 南开大学化学学院  
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