Porous graphene nanoarchitectures: An efficient catalyst for low charge-overpotential, long life, and high capacity lithium-oxygen batteries

Sun, Bing, Huang, Xiaodan, Chen, Shuangqiang, Munroe, Paul and Wang, Guoxiu (2014) Porous graphene nanoarchitectures: An efficient catalyst for low charge-overpotential, long life, and high capacity lithium-oxygen batteries. Nano Letters, 14 6: 3145-3152. doi:10.1021/nl500397y


Author Sun, Bing
Huang, Xiaodan
Chen, Shuangqiang
Munroe, Paul
Wang, Guoxiu
Title Porous graphene nanoarchitectures: An efficient catalyst for low charge-overpotential, long life, and high capacity lithium-oxygen batteries
Journal name Nano Letters   Check publisher's open access policy
ISSN 1530-6992
1530-6984
Publication date 2014-06-11
Sub-type Article (original research)
DOI 10.1021/nl500397y
Open Access Status Not yet assessed
Volume 14
Issue 6
Start page 3145
End page 3152
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
The electrochemical performance of lithium-oxygen (Li-O2) batteries awaits dramatic improvement in the design of porous cathode electrodes with sufficient spaces to accommodate the discharge products and discovery of effective cathode catalysts to promote both oxygen reduction reactions and oxygen evolution reactions. Herein, we report the synthesis of porous graphene with different pore size architectures as cathode catalysts for Li-O2 batteries. Porous graphene materials exhibited significantly higher discharge capacities than that of nonporous graphene. Furthermore, porous graphene with pore diameter around 250 nm showed the highest discharge capacity among the porous graphene with the small pores (about 60 nm) and large pores (about 400 nm). Moreover, we discovered that addition of ruthenium (Ru) nanocrystals to porous graphene promotes the oxygen evolution reaction. The Ru nanocrystal-decorated porous graphene exhibited an excellent catalytic activity as cathodes in Li-O2 batteries with a high reversible capacity of 17 700 mA h g-1, a low charge/discharge overpotential (about 0.355 V), and a long cycle life up to 200 cycles (under the curtaining capacity of 1000 mAh g-1). The novel porous graphene architecture inspires the development of high-performance Li-O2 batteries.
Keyword Cathode catalyst
Lithium-oxygen battery
Porous graphene
Ruthenium nanocrystals
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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