Fibrous separation membrane for secondary battery and manufacturiing method thereof

Abstract

Disclosed herein is a fibrous separation membrane for secondary batteries, comprising: a support layer containing cellulose fiber; and a first heat-resistant resin layer applied on one side of the support layer.

1 .- 8 . (canceled) 
     
     
         9 . A method of manufacturing a fibrous separation membrane for secondary batteries, comprising:
 forming a support layer containing cellulose fiber; and   electrospinning a heat-resistant resin solution onto one side of the support layer to form a first ultrafine-fibrous heat-resistant resin layer.   
     
     
         10 . The method according to  claim 9 , further comprising: electrospinning a first polymer solution onto one side of the support layer to form a first ultrafine-fibrous polymer layer between the forming the support layer and the forming the first ultrafine-fibrous heat-resistant resin layer. 
     
     
         11 . The method according to  claim 10 , wherein the first polymer layer is made of a polymer material having a melting point of 100˜180° C. 
     
     
         12 . The method according to  claim 9 , further comprising: electrospinning a heat-resistant resin solution onto the other side of the support layer to form a second ultrafine-fibrous heat-resistant resin layer. 
     
     
         13 . The method according to  claim 12 , further comprising: electrospinning a second polymer solution onto the other side of the support layer to form a second ultrafine-fibrous polymer layer between the forming the support layer and the forming the second ultrafine-fibrous heat-resistant resin layer. 
     
     
         14 . The method according to  claim 13 , wherein the second polymer layer is made of a polymer material having a melting point of 100˜180° C.