POROUS FILM MATERIAL COMPRISING AT LEAST ONE CARBONACEOUS SEMIMETAL OXIDE PHASE, AND USE THEREOF AS A SEPARATOR MATERIAL FOR ELECTROCHEMICAL CELLS
申请人:Hildebrandt Nicole
公开号:US20110003189A1
公开(公告)日:2011-01-06
The present invention relates to a novel porous film material which comprises at least one carbonaceous semimetal oxide phase, and to a process for production thereof. The invention also relates to the use of these porous film materials as a separator layer or for production of such separator layers in electrochemical cells, particularly in lithium cells and especially in lithium secondary cells.
The inventive porous film material comprises:
a) at least one carbonaceous (semi)metal oxide phase A of silicon, of aluminum, of titanium or of zirconium, which has hydrocarbon groups bonded covalently to the (semi)metal of said (semi)metal oxide phase A;
b) optionally one or more organic polymer phases B,
said carbonaceous (semi)metal oxide phase A forming essentially continuous phase domains in which the pore phase present in the film material and the optionally present organic polymer phase(s) B are intercalated, the mean distance between two phase boundaries of adjacent domains of identical phases being not more than 50 nm, preferably not more than 10 nm, particularly not more than 5 nm and especially not more than 2 nm.
本发明涉及一种新型多孔薄膜材料,其包括至少一种碳半金属氧化物相,并涉及其生产方法。本发明还涉及将这些多孔薄膜材料用作电化学电池中的隔离层或用于生产这种隔离层,特别是在锂电池中的锂二次电池中。
创新的多孔薄膜材料包括:
a)至少一种碳半金属氧化物相A,其中半金属为硅、铝、钛或锆,其具有共价结合到该(半)金属的碳氢基团;
b)可选地,一个或多个有机聚合物相B;
所述碳半金属氧化物相A在薄膜材料中形成基本连续的相域,在该相域中,存在孔相和可选的有机聚合物相B,相邻相同相域的两个相界之间的平均距离不超过50纳米,优选不超过10纳米,特别不超过5纳米,尤其不超过2纳米。