Samsung Electronics Co., Ltd. (Gyeonggi-do, KR)

The composite separator is explained, along with a method for making it, and a secondary battery that includes the composite separator. The composite separator consists of a nonwoven fabric that is heat-resistant and a porous coating movie on at least one of the fabric’s surface. It also has the multi-phase monomer, which includes a stationary phase segment as well as a reversible one.

1. Field

Examples of embodiments are an ad hoc separator and the method of making it.

2. Description of the Related Art

With the growing capacity of secondary batteries, their applications areas are also expanding to high-capacity devices like power sources for electric vehicles and electric power storage systems. These types of applications can cause safety issues because of the production and use of these batteries.

A polyethylene separator can be used as a separator to secondary batteries. The polyethylene separator typically has good electrochemical stability and mechanical strength, but it may not have enough electrolyte wettability or satisfactory thermal stability, both of which can hinder the installation of high-capacity, high-output secondary batteries. To combat these shortcomings, coating ceramic particles or binder polymers on a surface of the separator made of polyethylene can be utilized. However, this process could be a disadvantage due to the melting point being low of the polyethylene itself.

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