TY - JOUR
T1 - Free-standing graphene-based porous carbon films with three-dimensional hierarchical architecture for advanced flexible Li-sulfur batteries
AU - Wu, Chao
AU - Fu, Lijun
AU - Maier, Joachim
AU - Yu, Yan
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2015.
PY - 2015/5/14
Y1 - 2015/5/14
N2 - Sulfur shows a large lithium-storage capacity and this make it an attractive cathode candidate for next-generation flexible lithium-ion batteries. However, the insulating nature of sulfur and the dissolution of intermediate polysulfides limit the rate performances and cycle life of Li-sulfur batteries. Here, we report a class of free-standing cathode films consisting of hierarchically porous carbon-encapsulated sulfur have high rate capability (a reversible capacity of 1017 mA h g-1, 865 mA h g-1, and 726 mA h g-1 at 0.2 C, 0.5 C and 1 C, respectively) as well as excellent cycle stability (approximate 10.5% capacity loss after 300 cycles). In addition, the free-standing cathode films have good mechanical flexibility, and thus show remarkable lithium-storage performances at the bent state. The results indicate that such free-standing cathode films with 3D hierarchical structure will provide new opportunities for Li-sulfur batteries for applications in flexible electronic devices.
AB - Sulfur shows a large lithium-storage capacity and this make it an attractive cathode candidate for next-generation flexible lithium-ion batteries. However, the insulating nature of sulfur and the dissolution of intermediate polysulfides limit the rate performances and cycle life of Li-sulfur batteries. Here, we report a class of free-standing cathode films consisting of hierarchically porous carbon-encapsulated sulfur have high rate capability (a reversible capacity of 1017 mA h g-1, 865 mA h g-1, and 726 mA h g-1 at 0.2 C, 0.5 C and 1 C, respectively) as well as excellent cycle stability (approximate 10.5% capacity loss after 300 cycles). In addition, the free-standing cathode films have good mechanical flexibility, and thus show remarkable lithium-storage performances at the bent state. The results indicate that such free-standing cathode films with 3D hierarchical structure will provide new opportunities for Li-sulfur batteries for applications in flexible electronic devices.
UR - http://www.scopus.com/inward/record.url?scp=84929493431&partnerID=8YFLogxK
U2 - 10.1039/c5ta00343a
DO - 10.1039/c5ta00343a
M3 - 文章
AN - SCOPUS:84929493431
SN - 2050-7488
VL - 3
SP - 9438
EP - 9445
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 18
ER -