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Title: Utilizing environmental friendly iron as a substitution element in spinel structured cathode materials for safer high energy lithium-ion batteries

Suppressing oxygen release from lithium ion battery cathodes during heating is a critical issue for the improvement of the battery safety characteristics because oxygen can exothermically react with the flammable electrolyte and cause thermal runaway. Previous studies have shown that oxygen release can be reduced by the migration of transition metal cations from octahedral sites to tetrahedral sites during heating. Such site-preferred migration is determined by the electronic structure of cations. In addition, taking advantage of the unique electronic structure of the environmental friendly Fe, this is selected as substitution element in a high energy density material LiNi 0.5Mn 1.5O 4 to improve the thermal stability. The optimized LiNi 0.33Mn 1.33Fe 0.33O 4 material shows significantly improved thermal stability compared with the unsubstituted one, demonstrated by no observed oxygen release at temperatures as high as 500°C. Due to the electrochemical contribution of Fe, the high energy density feature of LiNi 0.5Mn 1.5O 4 is well preserved.
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [4] ;  [3] ;  [5] ;  [6] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
  4. Canadian Light Sources, Inc., Saskatoon, SK (Canada)
  5. Osaka City Univ., Osaka (Japan)
  6. Dongguk Univ., Seoul (Korea, Republic of)
Publication Date:
Report Number(s):
Journal ID: ISSN 1614-6832; R&D Project: MA453MAEA; VT1201000
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 5; Journal Issue: 12; Journal ID: ISSN 1614-6832
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
25 ENERGY STORAGE; National Synchrotron Light Source; structure-property relationship; energy storage; lithium ion batteries; cathode; high voltage spinel
OSTI Identifier: