Journal
SMALL
Volume 15, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201804670
Keywords
density functional theory; electrolyte decomposition; hysteresis; lithium-ion batteries; metal fluorides
Categories
Funding
- Army Research Office [W911NF-17-1-0053]
- Battery Materials Research program, under the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the US Department of Energy
- China Scholarship Council
Ask authors/readers for more resources
The rapid development of ultrahigh-capacity alloying or conversion-type anodes in rechargeable lithium (Li)-ion batteries calls for matching cathodes for next-generation energy storage devices. The high volumetric and gravimetric capacities, low cost, and abundance of iron (Fe) make conversion-type iron fluoride (FeF2 and FeF3)-based cathodes extremely promising candidates for high specific energy cells. Here, the substantial boost in the capacity of FeF2 achieved with the addition of NiF2 is reported. A systematic study of a series of FeF2-NiF2 solid solution cathodes with precisely controlled morphology and composition reveals that the presence of Ni may undesirably accelerate capacity fading. Using a powerful combination of state-of-the-art analytical techniques in combination with the density functional theory calculations, fundamental mechanisms responsible for such a behavior are uncovered. The unique insights reported in this study highlight the importance of careful selection of metals and electrolytes for optimizing electrochemical properties of metal fluoride cathodes.
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