Ultrafast Discharge/Charge Rate and Robust Cycle Life for High-Performance Energy Storage Using Ultrafine Nanocrystals on the Binder-Free Porous Graphene Foam

Cited 27 time in webofscience Cited 0 time in scopus
  • Hit : 558
  • Download : 0
A hierarchical architecture fabricated by integrating ultrafine titanium dioxide (TiO2) nanocrystals with the binder-free macroporous graphene (PG) network foam for high-performance energy storage is demonstrated, where mesoporous open channels connected to the PG facilitate rapid ionic transfer during the Li-ion insertion/extraction process. Moreover, the binder-free conductive PG network in direct contact with a current collector provides ultrafast electronic transfer. This structure leads to unprecedented cycle stability, with the capacity preserved with nearly 100% Coulombic efficiency over 10 000 Li-ion insertion/extraction cycles. Moreover, it is proven to be very stable while cycling 10 to 100-fold longer compared to typical electrode structures for batteries. This facilitates ultrafast charge/discharge rate capability even at a high current rate giving a very short charge/discharge time of 40 s. Density functional theory calculations also clarify that Li ions migrate into the TiO2-PG interface then stabilizing its binder-free interface and that the Li ion diffusion occurs via a concerted mechanism, thus resulting in the ultrafast discharge/charge rate capability of the Li ions into ultrafine nanocrystals
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2016-07
Language
English
Article Type
Article
Keywords

LITHIUM-ION BATTERIES; CHEMICAL-REDUCTION; TIO2 ANATASE; ANODE; OXIDE; FABRICATION; CHALLENGES; ELECTRODES; NANOTUBES; CAPACITY

Citation

ADVANCED FUNCTIONAL MATERIALS, v.26, no.28, pp.5139 - 5148

ISSN
1616-301X
DOI
10.1002/adfm.201601355
URI
http://hdl.handle.net/10203/213180
Appears in Collection
EEW-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 27 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0