Journal
ADVANCED MATERIALS
Volume 30, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201704353
Keywords
anodes; graphite; hydride; lithium-ion batteries; rare earths
Categories
Funding
- National Science Foundation of China (NSFC) [51431001, U1607126, 11375020, 21321001]
Ask authors/readers for more resources
The lithium storage capacity of graphite can be significantly promoted by rare earth trihydrides (REH3, RE = Y, La, and Gd) through a synergetic mechanism. High reversible capacity of 720 mA h g(-1) after 250 cycles is achieved in YH3-graphite nanocomposite, far exceeding the total contribution from the individual components and the effect of ball milling. Comparative study on LaH3-graphite and GdH3-graphite composites suggests that the enhancement factor is 3.1-3.4 Li per active H in REH3, almost independent of the RE metal, which is evident of a hydrogen-enhanced lithium storage mechanism. Theoretical calculation suggests that the active H from REH3 can enhance the Li+ binding to the graphene layer by introducing negatively charged sites, leading to energetically favorable lithiation up to a composition Li5C16H instead of LiC6 for conventional graphite anode.
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