不同铝源Al_2O_3包覆Li_(1.15)Ni_(0.17)Co_(0.11)Mn_(0.57)O_2电化学性能研究  

Performance of Li_(1.15)Ni_(0.17)Co_(0.11)Mn_(0.57)O_2 cathode materials coating with Al_2O_3 by different kinds of alumina sources as lithium-ion batteries

作　　者：张莉莉[1] 陈静娟[1,2] 项宏发[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]安庆师范学院化学化工学院,安徽安庆246011

出　　处：《电源技术》2016年第11期2115-2117,2176,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(21006033;51372060)

摘　　要：分别采用硝酸铝[Al(NO_3)_3]、异丙醇铝(C_9H_(21)AlO_3)及纳米氧化铝(nano-Al_2O_3)为原料,通过不同方法对富锂层状氧化物正极材料Li_(1.15)Ni_(0.17)Co_(0.11)Mn_(0.57)O_2进行包覆改性,研究了不同铝源为原材料进行Al_2O_3包覆对Li_(1.15)Ni_(0.17)Co_(0.11)Mn_(0.57)O_2的结构和电化学性能的影响。采用X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)及电化学测试等方法来表征包覆前后Li_(1.15)Ni_(0.17)Co_(0.11)Mn_(0.57)O_2材料的表面形貌和电化学性能。研究结果表明,Al(NO_3)_3为铝源的包覆提高了电池的首次比容量、循环性能及倍率性能,以C_9H_(21)AlO_3为铝源的包覆层对电池的循环性能有比较好的提升。Al2O3-coated Li1.15Ni0.17Co0.11Mn0.57O2 lithium-rich layered cathode materials were prepared by different methods with alumina sources of aluminium nitrate （Al（NO3）3）, aluminium isopropoxide （C9H21AlO3） and nano-alumina （nano-Al2O3）, respectively and the effect of coating cathode materials with different alumina sources on the structure and electrochemical performance of Li1.15Ni0.17Co0.11Mn0.57O2 were compared. The pristine material and Al2O3--coated Li1.15Ni0.17Co0.11Mn0.57O2 were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and electrochemical test. The result shows that AI （NO3）3 as raw material to coat Al2O3 on the cathode material can improve the specific capacity, cycle performance and rate performance,while the Al2O3 coating layer formed from C9H21AlO3 can enhance the cycle performance.

关 键 词：锂离子电池 富锂层状氧化物正极材料 AL2O3 包覆 

分 类 号：TM912[电气工程—电力电子与电力传动]