Journal
SMALL
Volume 14, Issue 42, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201803310
Keywords
graphene; high capacity; host materials; Li dendrite; Li-metal batteries
Categories
Funding
- National Natural Science Foundation of China (NSFC) [21522601, U1508201]
- National Key Research and Development Program of China [2016YFB0101201]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Research Chair Program (CRC)
- Canada Foundation for Innovation (CFI)
- Western University
Ask authors/readers for more resources
A safe, high-capacity, and long-life Li metal anode is highly desired due to recent developments in high-energy-density Li-metal batteries. However, there are still rigorous challenges associated with the undesirable formation of Li dendrites, lack of suitable host materials, and unstable chemical interfaces. Herein, a carbon nanofiber-stabilized graphene aerogel film (G-CNF film), inspired by constructional engineering, is constructed. As the host material for Li deposition, the G-CNF film features a large surface area, porous structure, and a robust skeleton that can render low local current density. This allows for dendrite-free Li deposition and mitigation of problems associated with large volume change. Importantly, the G-CNF film can keep high Li plating/stripping efficiency at nearly 99% for over 700 h with an areal capacity of 10 mA h cm(-2) (the specific capacity up to 2588 mA h g(-1) based on the total mass of carbon host and Li metal). The symmetric cells can stably run for more than 1000 h with low voltage hysteresis. The full cell with the LiFePO4 cathode also delivers enhanced capacity and lowered overpotential. As two-in-one host materials for both cathodes and anodes in Li-O-2 batteries, the battery exhibits a capacity of 1.2 mA h cm(-2).
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