分隔件及包含其之电化学装置;SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING THE SAME

摘要

本发明系有关于一种用于电化学装置之分隔件以及具有其之电化学装置。本发明分隔件包括多孔性基板；第一多孔性涂布层，形成于多孔性基板之一表面上，包含无机颗粒及第一黏结剂聚合物之混合物；以及第二多孔性涂布层，形成于多孔性基板另一面上，包含藉由乾燥溶剂、非溶剂及第二黏结剂聚合物之混合物所获得之产物。;因形成于本发明分隔件一面上之多孔性有机-无机涂布层，其具有优异热安全性；并且因藉由涂布并乾燥黏结剂聚合物及非溶剂之混合物所形成之黏结剂薄膜于其另一面上所制成之多孔性涂布层，其具有较佳黏着性。此外，分隔件可减少厚度以降低电化学装置阻抗及提高其电容。; a first porous coating layer formed on one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on the other surface of the porous substrate and comprising a product obtained by drying a mixture of a solvent, a non-solvent and a second binder polymer. ;Such separator of the present invention can have good thermal safety due to a porous organic-inorganic coating layer formed on one surface thereof, and superior adhesiveness due to a porous coating layer made of a binder thin film formed by applying and drying a mixture of a binder polymer and a non-solvent on the other surface thereof. Also, the separator can have a decreased thickness to reduce the resistance of electrochemical device and improve the capacity thereof.