Carbon-, Binder-, and Precious Metal-Free Cathodes for Non-Aqueous Lithium-Oxygen Batteries: Nanoflake-Decorated Nanoneedle Oxide Arrays
- Carbon-, Binder-, and Precious Metal-Free Cathodes for Non-Aqueous Lithium-Oxygen Batteries: Nanoflake-Decorated Nanoneedle Oxide Arrays
- Ahmer Riaz; 정규남; 장원영; 신경희; 이종원
- lithium-oxygen battery; carbon; metal oxide array; nanoarchitecture; cyclability
- Issue Date
- ACS Applied Materials & Interfaces
- VOL 6, NO 20, 17815-17822
- 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).
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