Development of active materials of nonaqeous lithium secondary battery, based on its discharge and charge mechanisms.

金属氧化物、金属硫醚和导电聚合物在非有序溶剂中被调查以开发锂二电池的正活性材料的正活性材料的电荷和电荷机制。这些反应与<Li^+> ion、<ClO（_4^-）>、<BF（_4 ^-）>或<PF_6^-）>的插入和消除的过程有关。在本研究中，&lt;Li^+&gt;离子和&lt;ClO（_4^-）&gt;等扩散行为在活性材料的固态阶段进行了测试，使用可能的步骤方法进行了利用射频补充法准备的稀土和解剖<TiO_2>酶薄薄膜。Anatase<TiO_2>薄膜在400 ° C的温度下加热，增加了它的水晶。锂在电影中的扩散系数<TiO_2>估计，并假定一个尺寸有限扩散。Diffusion coefficient increased with decreasing of crystallinity of <TiO_2>film.因此，类似的是，它必须适合<TiO_2>锂二级电池的活性材料。<MoS_2>这也是一个调查，它有一个分层结构。在这种情况下，将&lt;Li^+&gt;离子<MoS_2>分解成层，结果由于&lt;Li^+&gt;离子的扩散抵抗力而导致大极化。因此，对于电介质来说，不能与&lt;Li^+&gt;离子产生强烈的相互作用，研究了多乙酰和多苯胺中的有机物扩散行为以及&lt;ClO（_4^-）&gt;、&lt;BF（_4 ^-）&gt;和&lt;PF（_6^-）&gt;产生了1x &lt;10^（-14）&gt; &lt;cm^2&gt; &lt;s^（-1）&gt;的顺序。这意味着释放和释放反应是由聚合物中的离子扩散过程限制的。因此，多苯胺的薄膜是由电化学聚合物制备的，并对其进行了检验，以释放和电荷特性。这类电影的电子指标显示了锂二级电池的活性材料的良好性能。这是因为聚合物中阴离子的扩散路径变短。

The discharge and charge mechanisms of metallic oxides, metallic sulfides, and conducting polymers in nonaqueous solvent were investigated in order to develop the positive active material of lithium secondary batteries. These reactions proceeds with the insertion and deinsertion of <Li^+> ion, <ClO(_4^-)> , <BF(_4^-)> , or <PF_6^-)> . In this study, the diffusion behavior of <Li^+> ion and <ClO(_4^-)> etc. in solid phase of active material were examined by using a potential step method.Rutile and anatase <TiO_2> thin films were prepared by rf-supptering method. Anatase <TiO_2> films was heated at 400゜C to increase its crystallinity. Diffusion coefficients of lithium in <TiO_2> films were estimated, assuming one-dimensional finite diffusion. Diffusion coefficient increased with decreasing of crystallinity of <TiO_2> film. Therefore, amorphous like <TiO_2> must be suitable for active material of lithium secondary battery. <MoS_2> were also investigated, which has a layer structure. In this case, solvated <Li^+> ion intercalated into <MoS_2> layer, resulting in large polarization caused by diffusion resistance of <Li^+> ion. Therefore, the solvent for the electrolyte must not strongly interact with <Li^+> ion.Diffusion behavior of anions in polyacetylene and polyaniline were studied and the diffusion coefficients of <ClO(_4^-)> , <BF(_4^-)> , and <PF(_6^-)> were obtained to be the order of 1x <10^(-14)> <cm^2> <s^(-1)> . This means that the discharge and charge reactions are limited by diffusion process of anions in polymer. Therefore, thin film of polyaniline was prepared by electrochemical polymerization and was examined its discharge and charge characteristics. Such film electrode indicates the good performance as active material of lithium secondary battery. This is because the diffusion path for anion in polymer becomes short.