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材料导报  2020, Vol. 34 Issue (6): 6039-6043    https://doi.org/10.11896/cldb.19040213
  无机非金属及其复合材料 |
原料对强化固相反应合成的LiNi1/3Co1/3Mn1/3O2粉末电化学性能的影响
徐枫1, 严红革1, 陈吉华1, 张正富2, 范长岭1
1 湖南大学材料科学与工程学院,长沙 410082;
2 昆明理工大学材料科学与工程学院,昆明 650093
Impact of Raw Materials on Electrochemical Properties of LiNi1/3Co1/3Mn1/3O2 Powders Prepared by Enhanced Solid State Reaction
XU Feng1, YAN Hongge1, CHEN Jihua1, ZHANG Zhengfu2, FAN Changling1
1 School of Materials Science and Engineering, Hunan University, Changsha 410082, China;
2 Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
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摘要 分别以碳酸盐和氧化物为原料,利用强化固相反应直接合成LiNi1/3Co1/3Mn1/3O2超微粉末。采用X射线衍射仪和扫描电子显微镜表征了以不同原料合成的产物粉末在结构和形貌上的差异,并分别在常温(25℃)和高温(55℃)下对产物进行了电化学性能测试。结果表明:以碳酸盐为原料的产物LC-BM20相比于以氧化物为原料的产物LO-BM20具有更为完整的晶体结构和更细小的粒径分布;当温度为25℃时,LC-BM20在0.1C(1C=270mA/g)倍率下的首周库伦效率高达91.9%,在6C倍率下的放电比容量仍保持在133.0mAh/g,在1C倍率下循环100次后的容量保持率达到88.2%;当温度为55℃时,LO-BM20的性能更优异,在0.1C倍率下的首次放电比容量达到197.0mAh/g,在1C倍率下循环100次后的容量保持率达到82.9%。
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徐枫
严红革
陈吉华
张正富
范长岭
关键词:  LiNi1/3Co1/3Mn1/3O2  强化固相反应  高能球磨  机械力活化  电化学性能    
Abstract: The ultrafine LiNi1/3Co1/3Mn1/3O2 powders were directly synthesized using carbonates or oxides via an enhanced solid state reaction. The microstructures, morphologies and electrochemical properties at 25/55 ℃ of product powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical workstation. The results shows that the well-ordered product powders with a finer size distribution are synthesized using carbonates. At 25 ℃, the initial coulomb efficiency of LC-BM20 reaches 91.9% at 0.1C (1C=270 mA/g) rate, discharge capacity of 133.0 mAh/g is delivered at 6C rate. After cycling 100 times, the capacitance retention still maintains 88.2% at the rate of 1C. At 55 ℃,LO-BM20 shows better electrochemical properties, the initial discharge capacity of LO-BM20 is 197.0 mAh/g at 0.1C. After cycling 100 times, the capacitance retention still maintains 82.9% at the rate of 1C.
Key words:  LiNi1/3Co1/3Mn1/3O2    enhanced solid state reaction    high-energy ball milling    mechanical activated    electrochemical properties
               出版日期:  2020-03-25      发布日期:  2020-03-12
ZTFLH:  TM912  
基金资助: 国家自然科学基金(U1202272)
作者简介:  徐枫,2014年6月毕业于湖南大学,获得工学学士学位。于2014年9月至今在湖南大学攻读博士学位,主要研究方向为粉体材料;严红革,湖南大学教授、博士研究生导师。主要从事先进铝合金、镁合金及其复合材料等领域的研究。主持国家自然科学基金项目和其他部省级纵向课题10余项,发表学术论文150余篇。
引用本文:    
徐枫, 严红革, 陈吉华, 张正富, 范长岭. 原料对强化固相反应合成的LiNi1/3Co1/3Mn1/3O2粉末电化学性能的影响[J]. 材料导报, 2020, 34(6): 6039-6043.
XU Feng, YAN Hongge, CHEN Jihua, ZHANG Zhengfu, FAN Changling. Impact of Raw Materials on Electrochemical Properties of LiNi1/3Co1/3Mn1/3O2 Powders Prepared by Enhanced Solid State Reaction. Materials Reports, 2020, 34(6): 6039-6043.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19040213  或          http://www.mater-rep.com/CN/Y2020/V34/I6/6039
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