Journal
ADVANCED ENERGY MATERIALS
Volume 12, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202103332
Keywords
iron fluoride; lithium dendrites; lithium metal anodes; protective layers; valence gradient
Categories
Funding
- National Natural Science Foundation of China [U21A2080, 51788104]
- Tsinghua-Foshan Innovation Special Fund [2018THFS0409]
Ask authors/readers for more resources
A Fe-based protective layer has been constructed on Li anodes to address the challenges of unstable solid electrolyte interphase and Li dendrite formation. This protective layer enables stable and high-performance Li anode operation.
Li metal is the next-generation anode material for high-energy-density Li-ion batteries. Unfortunately, its practical application is hampered by drawbacks such as an unstable solid electrolyte interphase and undesirable Li dendrites. Herein, an Fe-based protective layer with a valence gradient is constructed on Li anodes, which consists of an Fe3+/Fe2+-rich outer layer and an Fe-0-containing inner layer. The protective layer not only isolates the underlying Li metal from the corrosive carbonate electrolyte, but also uniformly stores Li during plating and inhibits the growth of Li dendrites. The Li anode with the Fe-based protective layer shows dendrite-free Li plating/stripping behaviors; therefore, Li symmetric cells stably run for 1000 h at 1 mA cm(-2) and 1 mA h cm(-2) and even survive for 380 h at an ultra-high capacity of 30 mA h cm(-2). With such a highly stable Li anode, LiFePO4 cells operate steadily for 1600 and 1000 cycles at 1 and 5 C, respectively. High-loading LiCoO2 cells also present excellent cycling stability and rate capability, proving the advantages of the protective layer in Li anode protection.
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