锂离子电池负极材料CuSn的Li嵌入性质的研究

Investigation of lithium insertion in anode material CuSn for lithium-ion batteries

使用基于混合基表示的第一原理赝势法 ,研究了锂离子电池非碳类负极材料CuSn的Li嵌入时的形成能以及相应的电子结构 .还给出了Li嵌入时的体积变化 ,能带结构、电子态密度以及电荷密度分布等性质 ,并讨论了CuSn作为负极材料的特点 .计算发现 ,Cu Sn化合物在闪锌矿结构时 ,Li嵌入主体材料时的嵌入形成能大致在 3.

An ab initio method with mixed-basis norm-conserving non-local pseudopotentials has been employed to investigate the non-carbon-baring anode material-CuSn for lithium-ion batteries. The lithium intercalation energies and their electronic structures have been calculated. The changes of volume, band structures, electronic density of states and charge density contour plots for lithium intercalation in CuSn are also presented. The characteristics of CuSn as an anode material for lithium ion batteries are also discussed. By calculation, we have found that the insertion formation energy of Li insertion CuSn electrode with zinc-blende-type structures as the host framework is about 3.5eV.