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本文综述了Li、Li-C电极表面化学、形态研究的特点,论述了FTIR、XPS和AFM在研究Li、Li-C电极的表面化学和形态中的应用及优缺点。 相似文献
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Cd F molecule, which plays an important role in a great variety of research fields, has long been subject to numerous researchers. Due to the unstable nature and heavy atom Cd containing in the Cd F molecule, electronic states of the molecule have not been well studied. In this paper, high accurate ab initio calculations on the Cd F molecule have been performed at the multi-reference configuration interaction level including Davidson correction(MRCI + Q). Adiabatic potential energy curves(PECs) of the 14 low-lying Λ–S states correlating with the two lowest dissociation limits Cd(~1S_g) + F(~2P_u) and Cd(~3P_u) + F(~2P_u) have been constructed. For the bound Λ–S and ? states, the dominant electronic configurations and spectroscopic constants are obtained,and the calculated spectroscopic constants of bound states are consistent with previous experimental results. The dipole moments(DMs) of 2 Σ+ and 2Π are determined, and the spin–orbit(SO) matrix elements between each pair of X2Σ+, 22Σ+, 12Π, and 22Π are obtained. The results indicate that the sudden changes of DMs and SO matrix elements arise from the variation of the electronic configurations around the avoided crossing region. Moreover,the Franck–Condon factors(FCFs), the transition dipole moments(TDMs), and radiative lifetimes of low-lying states-the ground state X2Σ+are determined. Finally, the transitional properties of 22Π–X2Σ+and 22Σ+–X2Σ+are studied. Based on our computed spectroscopic information of Cd F, the feasibility and challenge for laser cooling of Cd F molecule are discussed. 相似文献
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提出了合金吸气剂除杂-气相色谱法测定混合气体中氪、氙含量的方法。样品通过减压进样装置进入气相色谱仪,选用管径为3.18 mm、长度为100 cm的不锈钢管为除杂柱,填装合金吸气剂,以消除氮气、氢气等杂质气体对氪、氙测定的干扰。结果显示:氪、氙的体积分数分别在4.55×10^(-4)%~2.65×10^(-3)%,5.60×10^(-5)%~3.29×10^(-4)%内与其对应的峰面积呈线性关系,检出限(3S/N)分别1.71×10^(-6)%,1.65×10^(-6)%;对混合标准气体重复测定6次,峰面积的相对标准偏差均不大于1.0%;按照试验方法与文献报道的气相色谱-质谱法对6个混合气体样品进行测定,相对偏差的绝对值均不大于1.0%。 相似文献
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硫酸钙及硫酸铵气溶胶对二次有机气溶胶生成的影响 总被引:1,自引:0,他引:1
二次有机气溶胶(SOA)是大气光化学反应的产物, 也是城市和郊区大气中细粒子的主要成分. 本研究致力于考察高浓度无机气溶胶颗粒对SOA生成的影响. 实验系统采用2 m3的温控烟雾箱, 以干燥的CaSO4和(NH4)2SO4为无机种子气溶胶, 研究了间二甲苯/NOx/空气体系光氧化生成SOA的过程. 实验结果显示间二甲苯和NOx在紫外光照下会产生大量SOA, SOA产率可用单产物模型表征. CaSO4气溶胶的存在对SOA产率曲线没有明显的影响, 而(NH4)2SO4气溶胶的存在使气相半挥发性氧化产物的生成量增加36%, 显著地增加了SOA的产率. (NH4)2SO4粒子在含水有机物作用下显现的弱酸性可能是导致这一影响的主要原因. 该实验结果有助于更详尽地阐明中国颗粒物污染严重城市SOA的生成机理, 从而为进一步修正空气质量模型提供依据. 相似文献
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锂离子电池有机电解液成膜添加剂研究进展 总被引:8,自引:0,他引:8
综述了锂离子电池有机电解液成膜添加剂的作用原理,从气体、液体、固体成膜添加剂三个方面综述了目前成膜添加剂的研究现状。重点论述了每一种添加剂的作用原理以及在碳负极上的还原机理,同时对它们的优缺点也作了适当的评述。 相似文献
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