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Development of Novel Organic Materials with High Energy and Power Densities

高能量和功率密度新型有机材料的开发

基本信息

批准号：
07555267
负责人：
OYAMA Noboru
金额：
$ 14.34万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555267/
关键词：
Secondary Battery Organosulfur Compounds Conducting Polymer Copper Current Collector ポリマー電池

项目摘要

Secondary batteries with high energy and power densities is expected for further development of electric vehicles and many other electric instruments. Objective of the present work is developing novel organic materials for high performance secondary batteries. First we examined electron transfer between a thiol (2,5-dimercapto-1,3,4-thiadiazole, DMcT) and a conducting polymer (polyaniline, PAn). As a result, it was found that the reversible electron transfer is possible between them. We have already found that the DMcT-PAn composite can serve as a high energy density cathode material for a secondary battery. However, charging current and discharging current of the battery were not high enough for the practical use. Then, we used a copper current collector for the composite cathode instead of a conventional carbon current collector. In the first few cycles, dissolution of the copper current collector was seen during the charging process. Simultaneously, an increase in the discharge capacity was seen. Since the charge-discharge capacity can exceed the theoretical capacity, which is calculated from amounts of DMcT and PAn, dissolved copper ion (s) must function as cathode active material. This suggests that some complex is formed between copper ion (s) and DMcT.Charging/discharging currents were high enough for the practical use. Although we have no clear evidence for the complex formation at present, we observed some change in the visible spectrum of a Cu (ClO_4)_2 solution upon addition of DMcT.Complex formation of Cu (I) and Cu (II) with DMcT has been reported as well as other transition metal ions. Other thiadiazoles also form complexes with copper and other metal ions. The complexes should be promising as cathode materials for secondary batteries.

具有高能量和功率密度的二次电池有望进一步发展电动汽车和许多其他电子仪器。本工作的目标是开发用于高性能二次电池的新型有机材料。首先，我们研究了硫醇(2，5-二硫代-1，3，4-噻二唑，DMcT)和导电聚合物(聚苯胺，PAN)之间的电子转移。结果发现，它们之间存在可逆的电子转移。我们已经发现，DMcT-PAn复合材料可以作为二次电池的高能量密度正极材料。然而，电池的充放电电流还不够大，不能满足实际使用的需要。然后，我们用铜集电体代替传统的碳集电体作为复合阴极。在最初的几个循环中，在充电过程中可以看到铜集电器的溶解。与此同时，放电容量也有所增加。由于充放电容量可以超过理论容量，这是根据DMcT和PAN的量计算的，因此溶解的铜离子(S)必须作为正极活性物质。这表明铜离子(S)与DMcT之间形成了某种络合物，充放电电流足以满足实际应用的需要。虽然目前还没有明确的证据证明DMcT与铜(ClO_4)_2形成络合物，但我们观察到加入DMcT后，Cu(ClO_4)_2溶液的可见光谱发生了一些变化。其他的噻二唑也与铜和其他金属离子形成络合物。该配合物有望成为二次电池的正极材料。