烧结温度对锂离子电池正极材料LiCoO2结构与电化学性能的影响

锂钴氧化物;烧结温度对锂离子电池正极材料LiCoO2结构与电化学性能的影响     

Osmotic Coefficients and Activity Coefficients of Nonaqueous Electrolyte Solutions. Part 4. Lithium Bromide, Tetrabutylammonium Bromide, and Tetrabutylammonium Perchlorate in Acetone

Vapor pressure lowering by the addition of lithium bromide (0.03–0.8m), tetrabutylammonium bromide (0.01–0.8m), and tetrabutylammonium perchlorate (0.02–3.6m) to acetone was measured at 25°C with high precision. The experimental data of the corresponding osmotic coefficients are compared to those obtained by the use of Pitzer equations and chemical model calculations. Mean activity coefficients are derived from the osmotic coefficients.     

配位化合物CH2LiX的修正计算

对于一系列配位化合物CH₂LiX(X=F, Cl),根据统计热力学和含Wigner校正的Eyring过渡态理论(TST),计算了热力学函数、平衡常数、速率常数、阿仑尼乌斯指前因子A(100—1700K)。从这些结果来看,不同构型的稳定性是随实验温度变化的。两种构型可能在某一温度共存。这一结果是不同于仅通过电子结构能所作出的推断的。     

A study on mixed conducting property of LixV2O5 (x = 0.4–1.4)

The mixed conducting nature of the lithium vanadate Li_xV₂O₅ (x = 0.4 – 1.4) prepared by solid state reaction has been analyzed by Wagner's polarization method. The increase of electronic conductivity with increase in lithium content has been observed. The low diffusion constant has been observed for lithium ionic motion in high lithium content samples. The conductivity spectra analysis shows the high columbic repulsive forces between mobile lithium ions in high lithium content samples. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

类锂等电子系列高位三激发态2p2np4So能量和到1s2pmp4P态的辐射跃迁

利用多组态相互作用方法及Rayleigh-Ritz变分法,计算了类锂离子2p2np4So(n=2-4)和1s2pmp4P(m=2,3)的能量.运用截断变分方法得到能量的改进量.计算了相对论修正、质量极化效应,从而获得了高精度的能量计算值.同时还计算了该系统之间的辐射跃迁波长、振子强度和辐射跃迁率.计算结果与实验符合得很好.     

黄河小浪底坝区泥化夹层分布及其抗剪试验方法的分析

在大量地质勘探试验研究资料的基础上 ,分析研究了形成泥化夹层的母岩和地质构造力 ,泥化夹层的类型及其粒度成分以及泥化夹层的分布规律。还分析研究了不同试验方法对泥化夹层抗剪强度的影响 ,并着重分析研究了我院研制的控制膨胀饱和固结慢剪的试验成果。     

高氯酸锂与4-叔丁基苯并-15-冠-5配合物的远红外位移

冠醚化合物对金属离子具有特定的络合作用 [1,2 ] .在冠醚萃取分离锂同位素过程中 ,4-叔丁基苯并 -1 5 -冠 -5 (4 -t-BB1 5 C5 )是锂同位素效应较大且最接近实用的多醚之一 .它容易合成[3] ,而且已有若干萃取研究[4～ 6 ] .本文合成了高氯酸锂与 4-叔丁基苯并 -1 5 -冠 -5配合物 ,测定了若干表征值和远红外位移 ,并根据已有的理论框架[7] 算得配合物的相对约化配分函数比 [(s/s′) f ]org和碘苯 -水溶液两相平衡过程中锂同位素分离系数 α.为在冠醚体系的锂同位素分离研究中应用红外光谱取代质谱 ,直接测定和计算(1 +εp)值提供了可能性 .…     

Formation and Thermal Decomposition of Gallium Oxynitride Compounds

The formation of a previously unknown crystalline phase was observed in the system Li–Ga–N–O. During the reactions of Ga₂O₃ with Li₃N and of LiGaO₂ with Li₃N, a new compound with the stoichiometry Li₄GaNO₂ was formed. The stages in thermal decomposition of the new phase were determined. This revised version was published online in July 2006 with corrections to the Cover Date.