公开(公告)号：US20200076009A1

公开(公告)日：2020-03-05

申请号：US16547582

申请日：2019-08-22

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chi Ho KWOK ,  Ka I LEE ,  Chenmin LIU ,  Ivan Ka Yu LAU

IPC: H01M10/42 ,  H01M10/0525 ,  H01M2/16 ,  A62C3/16 ,  A62C35/10

Abstract: Lithium ion batteries with improved fire resistance properties are described. The lithium ion battery includes a first electrode including a lithium compound and a second electrode. A separator is positioned between the first electrode and the second electrode and an electrolyte is provided. wherein the separator comprises at least a layer of polymeric nanofibers positioned on one side of a separator core and a fire-retardant polymer coating formed opposite to the nanofiber layer which is simultaneously deposited during electrospinning process. The polymeric nanofibers have a diameter less than approximately 1 micron. The polymeric nanofibers have a fire-retardant material entrapped within the nanofibers. The fire-retardant material has a lower melting point than the polymeric nanofibers. The separator/nanofibers/fire-retardant material are configured such that a fire-initiating event releases the entrapped fire-retardant material from the nanofibers which extinguishes the fire-initiating event.