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| 碳酸盐共沉淀法制备LiNi_(0.8)Co_(0.20-x)Al_xO_2 | |
| 引用本文： | 谢娇娜,李建刚,何向明.碳酸盐共沉淀法制备LiNi_(0.8)Co_(0.20-x)Al_xO_2[J].电池,2010,40(2). |
| 作者姓名： | 谢娇娜 李建刚 何向明 |
| 作者单位： | 1. 北京化工大学化学工程学院,北京,100029 2. 北京化工大学化学工程学院,北京,100029;北京石油化工学院应用化学系,北京,102617 3. 清华大学核能与新能源技术研究院,北京,100084 |
| 基金项目： | 北京市教委人才强教项目 |
| 摘 要： | 用碳酸盐共沉淀法制备了正极材料LiNi0.8Co0.20-xAlxO2(x=0.05、0.10和0.15)。Ni-Co-Al的碱式碳酸盐与LiOH·H2O混合,在700～800℃下煅烧16h,可制得有良好α-NaFeO2二维层状结构的球形LiNi0.8Co0.20-xAlxO2。铝掺杂促进了烧结,但掺杂过多会导致过度烧结和异形晶粒出现,降低性能。在750℃下煅烧制备的材料LiN0.8Co0.15Al0.05O2,0.2C首次放电比容量为162.1mAh/g,第20次循环时的容量保持率为94.6%。 |
| 关 键 词： | 球形 正极材料 铝掺杂 |
Preparation of LiNi0.8Co0.20-xAlxO2 by carbonate co-precipitation process |
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| XIE Jiao-na,LI Jian-gang,HE Xiang-ming.Preparation of LiNi0.8Co0.20-xAlxO2 by carbonate co-precipitation process[J].Battery Bimonthly,2010,40(2). | |
| Authors: | XIE Jiao-na LI Jian-gang HE Xiang-ming |
| Abstract: | LiNi0.8Co0.20-xAlxO2(x=0.05,0.10 and 0.15)cathode materials were prepared by carbonate co-precipitation process.By mixing basic Ni-Co-Al carbonate with LiOH·H2O and calcining at 700～800℃ for 16 h，spherical LiNi0．8Co0．20-xAlxO2 materials with fine α-NaFeO2 2D layered structure were prepared.Al doping enhanced the agglomeration,but excess doping led to excess agglomeration and appearance of abnormal crystal particles,decrease the performance.The 0.2 C initial specific discharge capacity of LiN0.8Co0.15Al0.05O2 material obtained by calcining at 750℃ was 162.1 mAh/g,the capacity retention at the 20th cycle was 94.6%. |
| Keywords: | LiNi0 8Co0 20-xAlxO2 spherical cathode material LiNi0 8Co0 20-xAlxO2 Al doping |
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