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SAFETY HIGH CAPACITY LITHIUM SECONDARY BATTERY HAVING HIGHLY ELECTROCONDUCTIVE CODEPOSITES FILMS OF CARBON POWDER AND POLYMER AS AN ANODE AND CATHODE.

具有碳粉和聚合物高导电共沉积膜作为阳极和阴极的安全高容量锂二次电池。

基本信息

批准号：
02453081
负责人：
TAKAMURA Tsutomu
金额：
$ 3.26万
依托单位：
RIKKYO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

1. Carbon Powder Codeposites: Several kinds of carbon black powder having different specific surface area were taken as samples. The powder was suspended in the electrolyte containing 1M LiClO_4 and 0.1M pyrrole monomer, the Pt mesh set in the solution being anodized. We have succeeded to obtain a conductive homogeneous codeposite of the carbon and polypyrrole. The cathodic characteristics was found increased over five times as compared to those of polypyrrole alone (Published in DENKIKAGAKU,No.11,1992. Submitted to The Journal of Power Sources).2. Evaluation of the Binder: Polyethylene, Teflon, polystyrene etc. were evaluated as binders of carbon active materials for Li anode. These polymers were kneaded with carbon powder with heat to make sheet electrode which was offered to test the anode characteristics. A new effective evaluation method on SEM was developed(Presented at the 35th International Power Sources Symposium, Published in DENKIKAGAKU No.10,1992).3. Active Carbon Fiber Electrode: Active carbon fiber having very large surface area was coated with polypyrrole film by anodizing it in the electrolyte containing pyrrole monomer. With this codeposited electrode material we have succeeded to increase the cathode capacity up to 220mAh/g whose value has never been attained outside of our laboratory. (Presented at the 1st West Pacific Meeting of Electrochemistry, and at the 33rd Battery Symposium).4. Depression of Freezing and Melting Point of Liquid in Microcapillary: We have found a new phenomena of the depression and separation of the melting and the freezing points of liquid when it is held in microcapillary. The unusual phenomena were elucidated on the basis of the phase nucleation theory(Presented at the 12th IUPAC International Conference and the 1st West Pacific Meeting of Electrochemistry).

1.碳粉共沉积：以几种不同比表面积的炭黑粉末为样品。将粉末悬浮在含有1M LiClO_4和0.1M吡咯单体的电解液中，将Pt网设置在溶液中进行阳极氧化。我们成功地获得了碳和聚吡咯的导电均质复合物。与单独的聚吡咯相比，发现阴极特性增加了五倍以上（发表于DENKIKAGAKU，No.11，1992.发表在《电源杂志》上。粘合剂的评价：评价聚乙烯、聚四氟乙烯、聚苯乙烯等作为锂阳极用碳活性材料的粘合剂。将这些聚合物与碳粉一起加热捏合制成片状电极，用于测试阳极性能。开发了一种新的有效的SEM评价方法（发表于第35届国际电源研讨会，发表于电化学学报1992年第10期）.活性碳纤维电极：在含有吡咯单体的电解液中，通过阳极氧化的方法，在大比表面积的活性炭纤维表面镀上聚吡咯膜。利用这种共沉积的电极材料，我们成功地将阴极容量提高到220mAh/g，其值在我们的实验室之外从未达到过。（在第一届西太平洋电化学会议和第33届电池研讨会上发表）。微毛细管中液体凝固点和熔点的降低：我们发现了微毛细管中液体凝固点和熔点的降低和分离的新现象。根据第12届IUPAC国际会议和第1届西太平洋电化学会议上提出的相成核理论对这一反常现象进行了解释。