Carbon-, Binder-, and Precious Metal-Free Cathodes for Non-Aqueous Lithium-Oxygen Batteries: Nanoflake-Decorated Nanoneedle Oxide Arrays

Title
Carbon-, Binder-, and Precious Metal-Free Cathodes for Non-Aqueous Lithium-Oxygen Batteries: Nanoflake-Decorated Nanoneedle Oxide Arrays
Authors
Ahmer Riaz정규남장원영신경희이종원
Keywords
lithium-oxygen battery; carbon; metal oxide array; nanoarchitecture; cyclability
Issue Date
2014-10
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 6, NO 20, 17815-17822
Abstract
Rechargeable lithium–oxygen (Li–O2) batteries have higher theoretical energy densities than today’s lithium-ion batteries and are consequently considered to be an attractive energy storage technology to enable long-range electric vehicles. The main constituents comprising a cathode of a lithium–oxygen (Li–O2) battery, such as carbon and binders, suffer from irreversible decomposition, leading to significant performance degradation. Here, carbon- and binder-free cathodes based on nonprecious metal oxides are designed and fabricated for Li–O2 batteries. A novel structure of the oxide-only cathode having a high porosity and a large surface area is proposed that consists of numerous one-dimensional nanoneedle arrays decorated with thin nanoflakes. These oxide-only cathodes with the tailored architecture show high specific capacities and remarkably reduced charge potentials (in comparison with a carbon-only cathode) as well as excellent cyclability (250 cycles).
URI
http://pubs.kist.re.kr/handle/201004/48574
ISSN
19448244
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KIST Publication > Article
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