α-MnO₂ Nanowire Catalysts with Ultra-High Capacity and Extremely Low Overpotential in Lithium-Air Batteries through Tailored Surface Arrangement

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α-MnO₂ Nanowire Catalysts with Ultra-High Capacity and Extremely Low Overpotential in Lithium-Air Batteries through Tailored Surface Arrangement

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Title: α-MnO₂ Nanowire Catalysts with Ultra-High Capacity and Extremely Low Overpotential in Lithium-Air Batteries through Tailored Surface Arrangement
Author(s):
Song, K.;
Jung, J.;
Heo, Y. -U;
Lee, Y. C.;
Cho, Kyeongjae;
Kang, Y. -M
Item Type: article
Keywords: Manganese oxides
Lithium-air batteries
Lithium peroxide
Abstract: We here report on very high capacity (11000 mA h g⁻¹), superb rate capability (4500 mA h g⁻¹ at 5000 mA g⁻¹) and high reversibility of Li-air batteries using α-MnO₂ NW catalysts mainly associated with their relatively large amount of Mn³⁺ exposed on the NW surface and a unique mechanism for deposition of discharge products. Our findings of the unprecedentedly fast Li-ion transport and reversible formation-decomposition of discharge products attributed to the modified surface arrangement of α-MnO₂ NWs suggest a strategy for achieving high-power Li-air batteries in combination with nano-architecture tailoring.
Alternative Title: Physical Chemistry Chemical Physics
ISSN: 14639076
Persistent Link: http://dx.doi.org/10.1039/c3cp53754d
http://hdl.handle.net/10735.1/3919
Terms of Use: This article may not be further made available or distributed.
Sponsors: "This research was supported by POSCO-RIST research program (2012K110) and by the NRF of Korea through WCU program (GrantNo.R-31-10083-0)."

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