Study on ionic conduction of solid-liquid composite electrolyte

在这项研究中，该复合物含有陶瓷离子和有机溶剂，已被测试为锂离子电池的电子。两个尺寸的粘土（smectite）被用作离子导体和丙烷碳酸酯，被用作溶剂。在粘土的铝氧化物层之间的客人疗法是由锂离子在氯化锂溶液中浸泡的。该复合体成为粘性流体，在粘土和溶剂之间产生强有力的相互作用，然后其锂离子的导电性通过Impedance方法得到了衡量。该复合体在房间温度中的10 -3-D1 Scm的导电性。在纯粹的液体电解质中，相同的行为顺序得到了实现。这一事实指标表明，复合材料中的粘土颗粒不会防止平滑的离子条件，但更容易增强，只是在复合材料的准备之后，没有离子物种出现在溶液中。“实验结果显示了这样一种高的离子活性，这表明锂从粘土基质中提取出溶液的机理，并将其作为一部分。”However，由于电子化的必要性，锂的固定数量应该可以在粘土矩阵中使用。通过粘土和溶剂的行为誓言并没有安排在平行但在系列中。This system is an理想的单离子导体及其高conductivity becomes an advantage for practical battery use.测试单元包含此复合电极与lithium anode and LiCoO D22 cathode show reversible capacity of 70 mAhg D1-1 D1 in the first cycle， the rapid loss observed in the following ones。在另一方，两张电解质的三明治锂片展示了关于锂沉积和溶解的良好循环行为。这是一个问题，因此，我们考虑到从阴极表面的界面优化的茎。在复合材料和阴极之间的接触的改进可能导致安全锂离子电池的发展。

In this study, the composite that contains ceramic ionic and organic solvent is tested as an electrolyte of lithium ion battery. Two-dimensional clays (smectite) were used as ionic conductor and propylene carbonate was used as solvent. The guest cation between aluminosilicate layers of the clay was ion-exchanged by lithium with being soaked in lithium chloride solution. The composite became sticky fluid due to strong interaction between clay and solvent, then its lithium ion conductivity was measured by impedance method.The conductivity of 10ィイD1-3ィエD1Scm at room temperature was obtained for the composite. In pure liquid electrolyte, the same order of conductivity is achieved. This fact indicates that the clay particles in the composite do not prevent from smooth ionic conduction but rather enhance it. Just after preparation of the composite, no ionic species exist in the solvent. The experimental result showing such quite high ionic conduction implies the mechanism that lithium comes out from clay matrix into solvent and takes part in conduction. However, from necessity of electroneutrality, fixed amount of lithium should be accommodated in clay matrix. The conduction oath through clay and solvent is arranged not in parallel but in series. This system is an ideal single ionic conductor and its high conductivity becomes an advantage for practical battery use.The test cell containing this composite electrolyte with lithium anode and LiCoOィイD22ィエD2 cathode show reversible capacity of 70mAhgィイD1-1ィエD1 in the first cycle, the rapid loss was observed in the following ones. On the other hand, the electrolyte sandwiched two lithium sheets show good cycling behavior about lithium deposition and dissolution. This problem is, therefore, considered o stem from interfacial optimization at cathode surface. The improvement of the contact between the composite and cathode may lead to the development of safer lithium ion battery.