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Title: Prevention of lithium-ion battery thermal runaway using polymer-substrate current collectors

Journal Article · · Cell Reports Physical Science
 [1];  [2];  [2];  [3]; ORCiD logo [1];  [1]; ORCiD logo [4];  [4];  [5];  [3];  [2];  [6]; ORCiD logo [3]
  1. Univ. College London (United Kingdom)
  2. NASA Johnson Space Center, Houston, TX (United States)
  3. Univ. College London (United Kingdom); Faraday Institution, Didcot (United Kingdom)
  4. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  5. National Physical Lab., Teddington (United Kingdom)
  6. National Renewable Energy Lab. (NREL), Golden, CO (United States)

Isolating electronically conducting material from internal short circuits is a promising way to prevent the onset of thermal runaway within lithium-ion cells. Here, a metal-coated polymer current collector, which is designed to disconnect internal short circuits by withdrawing from the heating region, is tested in 18650 cells. In addition to having lower mass and manufacturing costs, cells with metal-coated polymer current collectors demonstrate a reduced risk of thermal runaway during nail penetration. High-speed synchrotron X-ray radiography of 18650 cells during nail-penetration testing, in tandem with pre- and post-mortem X-ray computed tomography, provides insights into the function of the current collectors. The results are compared with those of 18650 cells with standard commercial aluminum and copper current collectors. Cells with aluminum-coated polymer current collectors demonstrated 100% success in thermal runaway prevention during nail penetration, retaining a cell voltage >4.00 V, while standard cells consistently experienced thermal runaway.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office; Engineering and Physical Sciences Research Council (EPSRC); STFC
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1778200
Report Number(s):
NREL/JA-5700-79766; MainId:36986; UUID:a3bea937-859d-46ad-af14-8b5fd53d22da; MainAdminID:21263
Journal Information:
Cell Reports Physical Science, Vol. 2, Issue 3; ISSN 2666-3864
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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