Gas–solid interfacial modification of oxygen activity in layered oxide cathodes for lithium-ion batteries

Lattice oxygen can play an intriguing role in electrochemical processes, not only maintaining structural stability, but also influencing electron and ion transport properties in high-capacity oxide cathode materials for Li-ion batteries. Here, we report the design of a gas-solid interface reaction to achieve delicate control of oxygen activity through uniformly creating oxygen vacancies without affecting structural integrity of Li-rich layered oxides. Theoretical calculations and experimental characterizations demonstrate that oxygen vacancies provide a favourable ionic diffusion environment in the bulk and significantly suppress gas release from the surface. The target material is achievable in delivering a…

• UD
  U.S. Department of Energy

  Awards: -AC02-05CH11231, Contract No. DE-AC02-05CH11231, 05CH11231, 7073923, AC02-98CH10886, No. DE-AC02-05CH11231, AC02-05CH11231, 174433KYSB20150047, DE-AC02, Contract No. DE-AC02-98CH10886, DE-AC02-05CH11231, DE-AC02-
• SS
  Salt Science Research Foundation

  Award: BL14W1
• CA
  Chinese Academy of Sciences

  Awards: 2012B82001, XDA09010101, 174433KYSB20150047, DE-AC02-98CH10886
• OO
  Office of Science

  Awards: DE-AC02-98CH10886, AC02-05CH11231, -AC02-05CH11231, DE-AC02, No. DE-AC02-05CH11231, Contract No. DE-AC02-05CH11231
• UO
  University of California, San Diego
• NM
  Ningbo Municipal Science and Technology Innovative Research Team

  Award: 2012B82001
• DO
  Division of Materials Research
• BE
  Basic Energy Sciences

  Awards: DE-AC02, AC02-05CH11231, DE-AC02-98CH10886, Contract No. DE-AC02-05CH11231, DE-AC02-05CH11231, No. DE-AC02-05CH11231, -AC02-05CH11231, AC02-98CH10886
• BN
  Brookhaven National Laboratory

  Awards: DE-AC02-05CH11231, DE-AC02-98CH10886, AC02-98CH10886, Contract No. DE-AC02-98CH10886