Safety shutdown separators [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.3 Electrical, magnetic, optical, communications, computer engineering; electronics, lighting
• Thông tin xuất bản: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Medium: ED : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 256500
• Chủ đề: 1. 30 direct energy conversion; 2. 36 materials science; 3. 37 inorganic, organic, physical, and analytical chemistry

Tóm tắt

 The present invention pertains to electrochemical cells which comprise (a) an anode
  (b) a cathode
  (c) a solid porous separator, such as a polyolefin, xerogel, or inorganic oxide separator
  and (d) a nonaqueous electrolyte, wherein the separator comprises a porous membrane having a microporous coating comprising polymer particles which have not coalesced to form a continuous film. This microporous coating on the separator acts as a safety shutdown layer that rapidly increases the internal resistivity and shuts the cell down upon heating to an elevated temperature, such as 110.degree. C. Also provided are methods for increasing the safety of an electrochemical cell by utilizing such separators with a safety shutdown layer.