类立方烷簇(Et_4N)[MoFe_3S_4(Et_2dtc)_5]CH_3CH的质谱

通过电子轰击谱,并借助亚稳技术及同位素丰度的比较分析,提出了(Et_4N)(MoFe_3S_4(Et_2dtc)-6]·CH_3CN质谱的可能断裂形式指出谱中的三个特征峰m/z 586、500及352的元素组成分别为MoFeS_6C_(14)H_(30)N_3,FeS_8C_(15)H_(30)N_3和FeS_4C_(14)H_(20)N_(20)m/z352的母离子为m/z500,而其子离子为m/z288、276和204。并由这些离子继续裂解成一系列较小的碎片离子。     

多核钼、铁、铬醋酸盐的质谱研究

本文报道了络合物Mo_2(CH_3COO)_4、Cr_2(CH_3COO)_和(Fe_nCr_(3-n)O(CH_3COO)_6(H_2O)_3]NO_3·3H_2O(n=3,2,1,0)的质谱,并基于亚稳离子测量和同位素质量组合及丰度分布计算提出了它们的主要断裂过程。     

Effect of Flow-rate Induced Cation Mixing and Particle Size Tuning on the Structure and Electrochemical Properties of LiNi0.8Co0.1Mn0.1O2 Synthesized by Spray Drying

Lithium ion battery cathode material LiNi0.8Co0.1Mn0.1O2(NCM811)was synthe-sized via a spray drying method.The effect of different spray drying flow-rates(200,250,300,and 400 mL·min^-1)on the structural and electrochemical properties of NCM811 are investigated.We find that the contents of Ni,Co,and Mn in the NCM811 cathode materials do not change significantly with the changing flow-rate,but the lattice parameter and morphology of the materials are significantly affected.Under the optimal spray drying flow-rate(250 mL·min^-1),the obtained NCM811 cathode(250NCM811)exhibits the best crystallinity,with the highest ratio of I(003)/I(104)in the XRD pattern.SEM images reveal the spherical morphology of 250NCM811 and the average diameter of about 5 mm.The results of electrochemical test show that the reversible capacity of 250NCM811 reaches 210 mA·g^-1 at 0.2 C(1 C=280 mA·g^-1).After 100 charge-discharge cycles at 1 C,the battery retains more than 94%of its initial capacity.Overall,spray drying flow-rate demonstrates great effect on the electrochemical properties of NCM811.