公开(公告)号：US06692873B1

公开(公告)日：2004-02-17

申请号：US09629951

申请日：2000-08-01

申请人： Chi-kyun Park ,  Archana Kakirde ,  Peikang Liu ,  Venkatesan Manivannan ,  Chul Chai ,  Dong-joon Ihm ,  Jon-ha Lee ,  Kwon-sun Roh

发明人： Chi-kyun Park ,  Archana Kakirde ,  Peikang Liu ,  Venkatesan Manivannan ,  Chul Chai ,  Dong-joon Ihm ,  Jon-ha Lee ,  Kwon-sun Roh

IPC分类号： H01M216

CPC分类号： H01M2/145 ,  H01M2/1653 ,  H01M2/1673 ,  H01M10/04 ,  H01M10/052 ,  Y10T29/49115

摘要： An electrode active material forming composition, a separator forming composition and a manufacturing method of a lithium secondary battery using the compositions are provided. The method for manufacturing a lithium secondary battery including the steps of (a) coating electrode active material compositions each comprising a electrode active material, a binder and a solvent on an electrode current collector to form a cathode and an anode, (b) forming a separator on both surfaces of the anode using a composition for forming a separator comprising a polymer resin, a plasticizer, a filler and a solvent; (c) disposing and fixedly adhering the cathode on the separator to form a battery structure, (d) drying the battery structure under a vacuum condition, and (e) impregnating an electrolytic solution into the resultant structure, wherein the plasticizer of the composition for forming the separator is at least one material selected from the group consisting of an ethylene glycol derivative, a cyclic carbonate, a non-cyclic carbonate and propylene glycol carbonate. Therefore, since a plasticizer can be removed under a vacuum condition, the time required for manufacturing a battery can be reduced and the manufacturing process becomes simplified, thereby improving the productivity. Also, since an organic solvent extraction process using an organic solvent is not necessary, unlike in the conventional art, the cost required for a recovery facility of an organic solvent can be reduced. Further, uniform pores are formed in electrodes and a separator, the porosity characteristics are excellent, and adhesion between the separator and the electrodes is excellent, thereby exhibiting excellent high-rate, lifetime, and low-temperature characteristics.

摘要翻译： 提供电极活性物质形成组合物，隔膜形成用组合物和使用该组合物的锂二次电池的制造方法。 一种锂二次电池的制造方法，包括以下步骤：（a）在电极集电体上涂布均包含电极活性物质，粘合剂和溶剂的电极活性物质组合物，形成阴极和阳极，（b） 使用用于形成包含聚合物树脂，增塑剂，填料和溶剂的隔膜的组合物的阳极的两个表面上的隔板; （c）将阴极设置并固定在隔板上以形成电池结构，（d）在真空条件下干燥电池结构，和（e）将电解液浸渍到所得结构中，其中用于 形成隔膜的是至少一种选自乙二醇衍生物，环状碳酸酯，非环状碳酸酯和丙二醇碳酸酯的材料。 因此，由于可以在真空条件下去除增塑剂，所以可以减少制造电池所需的时间，并且制造过程变得简化，从而提高生产率。 此外，由于不需要使用有机溶剂的有机溶剂萃取方法，与常规技术不同，可以降低有机溶剂的回收设备所需的成本。 此外，在电极和隔膜中形成均匀的孔，孔隙率特性优异，隔板和电极之间的粘附性优异，因此表现出优异的高速率，寿命和低温特性。

公开(公告)号：US06503661B1

公开(公告)日：2003-01-07

申请号：US09629950

申请日：2000-08-01

申请人： Chi-kyun Park ,  Archana Kakirde ,  Peikang Liu ,  Venkatesan Manivannan ,  Chul Chai ,  Dong-joon Ihm ,  Jon-ha Lee

发明人： Chi-kyun Park ,  Archana Kakirde ,  Peikang Liu ,  Venkatesan Manivannan ,  Chul Chai ,  Dong-joon Ihm ,  Jon-ha Lee

IPC分类号： H01M618

CPC分类号： H01M10/0525 ,  H01M6/168 ,  H01M6/181 ,  H01M6/188 ,  H01M10/0565

摘要： A composition for forming polymer electrolyte and a lithium secondary battery employing the polymer electrolyte prepared using the composition are provided. The composition for forming polymer solid electrolyte having a polymer resin, a plasticizer, a filler and a solvent, wherein the filler is synthetic zeolite having an affinity for an organic solvent or moisture. Therefore, the mechanical strength and ionic conductivity can be improved by adding synthetic zeolite as a filler when forming polymer electrolyte. Also, use of such polymer electrolyte makes it possible to prepare lithium secondary batteries having good high-current discharge characteristics and excellent discharge capacity characteristics even under repeated charge/discharge conditions.

摘要翻译： 提供了一种用于形成聚合物电解质的组合物和使用该组合物制备的使用聚合物电解质的锂二次电池。 用于形成具有聚合物树脂，增塑剂，填料和溶剂的聚合物固体电解质的组合物，其中填料是对有机溶剂或水分具有亲和性的合成沸石。 因此，当形成聚合物电解质时，通过加入合成沸石作为填料可以改善机械强度和离子传导性。 此外，通过使用这样的高分子电解质，即使在重复的充放电条件下也能够制备具有良好的高电流放电特性和优异的放电容量特性的锂二次电池。