Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 168, Issue 5, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac0020
Keywords
-
Funding
- Office of Vehicle Technologies of the U.S. Department of Energy, through the Advanced Battery Materials Research Program (Battery500 Consortium) [DE-EE0007765]
Ask authors/readers for more resources
Replacing manganese with aluminum through a continuous co-precipitation approach significantly enhances the electrochemical performance of NMC 811 cathodes. Among different Al% substituted samples, LiNi0.8Mn0.06Co0.1Al0.04O2 cathodes reduced the first capacity loss of pristine NMC 811 by 50% (18.0 vs 35.9 mAh g(-1)) and improved the capacity retention from 81.4% to 96.4% after 60 cycles at 0.5C in the voltage range of 2.8-4.4 V.
Nickel-rich layered oxides, such as LiNi0.8Mn0.1Co0.1O2 (NMC 811), are considered as one of the most promising candidates for the next-generation cathode because of their high energy densities and relatively low cost. However, the poor first Coulombic efficiency of NMC 811 leads to around a 15% capacity loss in the first cycle at a cut-off voltage of 4.4 V. Moreover, the structure degradation during cycling results in capacity fading and safety concerns, due to potential oxygen loss after charging. Here, with aluminum substitution for manganese through a developed continuous co-precipitation approach, the electrochemical performance of NMC 811 cathodes has been greatly enhanced. Among different Al% substituted samples, LiNi0.8Mn0.06Co0.1Al0.04O2 cathodes reduced by 50% the first capacity loss of pristine NMC 811(18.0 vs 35.9 mAh g(-1)) and improved the capacity retention from 81.4 to 96.4% after 60 cycles at 0.5C in the voltage range of 2.8-4.4 V.
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