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以LiOH·H2O、Ni(OAc)2·4H2O、Co(OAc)2·4H2O和MnO2为原料，在水热反应釜中预处理，然后进行高温固相反应，合成了一系列锂镍钴锰氧化物LiNi0.75-xCoxMn0.25O2(x=0.05,0.10,0.15,0.20,0.25)。通过X射线衍射(XRD)、扫描电子显微镜（SEM）和电化学性能测试对所得样品的结构、形貌、粒径及电化学性能进行了表征。结果表明，当x=0.20时，所合成的正极材料具有很好的α-NaFeO2型层状晶体结构，晶胞参数a=0.286 1 nm，c=1.416 4 nm， V=0.100 4 nm3，以50 mA·g-1的电流密度在3～4.3 V(vs Li/Li+)充放电时，首次放电比容量达172.5 mAh·g-1，首次放电效率高达90.9%，30个循环后其放电比容量依然保持在161.1 mAh·g-1。 相似文献
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LiNi1-xCoxO2 cathode materials for lithium ion batteries were synthesized by the co-precipitation and solid-state reaction methods with LiOH·H2O, Ni(NO3)2·6H2O and Co(NO3)2·6H2O as raw materials. The materials were characterized by XRD, SEM and electrochemical tests. The results showed that synthesized cathode materials were with layered structure similar to α-NaFeO2 and uniform morphology and nearly normal grain size distribution and better electrochemical performance when x was 0.18. The first charge and discharge capacity of the cathode material was 224.3 mAh·g-1 and 194.2 mAh·g-1, respectively. 88.5% of the first discharge capacity remained at the 20th cycle. 相似文献
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