Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 29, Pages 16040-16045Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b04343
Keywords
layered-layered Li1.2Mn0.6Ni0.2O2; barium doping; lithium ion battery; oxygen releasing; stabilizing oxygen radicals
Funding
- National Key Project on Basic Research [2015CB251104, 2013CB934000]
- National International Science and Technology Cooperation Project [2012DFG61480]
- China-Germany Electric Vehicle Project [2011AA11A290]
- China-US Electric Vehicle Project [2010DFA72760]
- Beijing Natural Science Foundation [2120001]
- Center for Electrical Energy Storage, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- National Science Foundation [CMMI-1200383, DMR-1410560]
- Argonne National Laboratory [4F31422]
- MRI-R2 grant from the National Science Foundation [DMR-0959470]
Ask authors/readers for more resources
The poor first-cycle Coulombic efficiency and rate performance of the Li-rich layered layered oxides are associated with oxygen gas generation in the first activation charging and sluggish charge transportation along the layers. hi this work, we report that barium doping improves the first-cycle efficiency of Li-rich layered-layered Li1.2Mn0.6Ni0.2O2 via suppression of the oxidation of O2- ions in the first charging. This effect can be attributed to the stabilizing effect of the barium cations on the oxygen radical intermediates generated during the oxidation of O2-. Meanwhile, because the stabilized oxygen radicals likely facilitate the charge transportation in the layered-layered structure, the barium-doped Li1.2Mn0.6Ni0.2O2 exhibits significant improvement in rate performance. Stabilizing the oxygen radicals could be a promising strategy to improve the electrochemical performance of Li-rich layered-layered oxides.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available